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wsm L3301 Workshop Manual

wsm L3301 Workshop Manual

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WORKSHOP MANUAL
TRACTOR
L3301,L3901,L4701
KiSC issued 09, 2016 A

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Summary of Contents for wsm L3301

  • Page 1 WORKSHOP MANUAL TRACTOR L3301,L3901,L4701 KiSC issued 09, 2016 A...
  • Page 2 TO THE READER This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the L3301, L3901 and L4701. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing".  Information This section primarily contains information below. • Safety First •...
  • Page 3 Record of Revisions For pdf, use search function {Search word} to find all the revised locations. Last digit Issue Reference of the Main Revised Point and Corrective Measures {Search word} month Page Code No. 2016.09 Maintenance interval was introduced. G-15 G-77 CCV heater equipped model was introduced.
  • Page 4 INFORMATION KiSC issued 09, 2016 A...

  • Page 5: Table Of Contents

    INFORMATION CONTENTS 1. SAFETY FIRST ..........................I-1 2. SAFETY DECALS .......................... I-4 [1] L3301/L3901..........................I-4 [2] L4701............................I-7 3. SPECIFICATIONS........................I-10 [1] L3301/L3901........................... I-10 [2] L4701............................I-12 4. TRAVELING SPEEDS........................I-13 [1] L3301/L3901........................... I-13 [2] L4701............................I-14 5. DIMENSIONS ..........................I-15 [1] L3301/L3901...........................

  • Page 6: Safety First

    L3301, L3901, L4701, WSM INFORMATION 1. SAFETY FIRST SAFETY FIRST • This symbol, the industry's "Safety Alert Symbol", is used throughout this manual and on labels on the machine itself to warn of the possibility of personal injury. Read these instructions carefully.
  • Page 7 L3301, L3901, L4701, WSM INFORMATION OPERATE SAFELY • Do not use the machine after you consume alcohol or medication or when you are tired. • Put on applicable clothing and safety equipment. • Use applicable tools only. Do not use alternative tools or parts.
  • Page 8 L3301, L3901, L4701, WSM INFORMATION KEEP A GOOD AIRFLOW IN THE WORK AREA • If the engine is in operation, make sure that the area has good airflow. Do not operate the engine in a closed area. The exhaust gas contains poisonous carbon monoxide.

  • Page 9: Safety Decals

    L3301, L3901, L4701, WSM INFORMATION 2. SAFETY DECALS The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
  • Page 10 L3301, L3901, L4701, WSM INFORMATION 9Y1211012INI0002US0 KiSC issued 09, 2016 A...
  • Page 11 L3301, L3901, L4701, WSM INFORMATION 9Y1211012INI0003US0 CARE OF DANGER, WARNING AND CAUTION LABELS 1. Keep danger, warning and caution labels clean and free from obstructing material. 2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.

  • Page 12: L4701

    L3301, L3901, L4701, WSM INFORMATION [2] L4701 9Y1211012INI0005US0 KiSC issued 09, 2016 A...
  • Page 13 L3301, L3901, L4701, WSM INFORMATION 9Y1211012INI0006US0 KiSC issued 09, 2016 A...
  • Page 14 L3301, L3901, L4701, WSM INFORMATION 9Y1211012INI0007US0 CARE OF DANGER, WARNING AND CAUTION LABELS 1. Keep danger, warning and caution labels clean and free from obstructing material. 2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.

  • Page 15: Specifications

    L3301, L3901, L4701, WSM INFORMATION 3. SPECIFICATIONS [1] L3301/L3901 L3301 L3901 Model Manual Transmission Manual Transmission 19.5 kW 22.8 kW PTO power* 20.7 kW (27.7 HP) 23.9 kW (32.1 HP) (26.2 HP) (30.6 HP) Model D1803-CR-E4 Type Direct injection, vertical, water-cooled, 4-cycle diesel...
  • Page 16 L3301, L3901, L4701, WSM INFORMATION L3301 L3901 Model Manual Transmission Manual Transmission PTO shaft Rear PTO SAE 1-3/8, 6 splines size Transmission driven with Rear PTO Type Live-continuous running PTO overrunning 540 min 540 min 540 min (rpm) / (rpm) /...

  • Page 17: L4701

    L3301, L3901, L4701, WSM INFORMATION [2] L4701 L4701 Model Manual Transmission Model V2403-CR-E4 Type Direct injection, vertical, water-cooled, 4-cycle diesel Number of cylinders Total displacement 2.434 L (148.5 cu.in.) Bore and stroke 87 × 102.4 mm (3.4 × 4.0 in.)

  • Page 18: Traveling Speeds

    L3301, L3901, L4701, WSM INFORMATION 4. TRAVELING SPEEDS [1] L3301/L3901 [Manual Transmission Type] (At rated engine rpm) Model L3301/L3901 Tire size (Rear) 11.2-24 Range gear Main gear shift km/h (mph) shift lever lever 1.7 (1.1) 2.2 (1.4) 3.8 (2.3) 5.6 (3.5) Forward 6.6 (4.1)

  • Page 19: L4701

    L3301, L3901, L4701, WSM INFORMATION [2] L4701 [Manual Transmission Type] (At rated engine rpm) Model L4701 Tire size (Rear) 14.9-24 Range gear Main gear shift km/h (mph) shift lever lever 2.2 (1.4) 2.8 (1.7) 4.6 (2.8) 6.7 (4.2) Forward 8.0 (5.0) 10.0 (6.2)

  • Page 20: Dimensions

    L3301, L3901, L4701, WSM INFORMATION 5. DIMENSIONS [1] L3301/L3901 9Y1211012INI0014US0 I-15 KiSC issued 09, 2016 A...

  • Page 21: L4701

    L3301, L3901, L4701, WSM INFORMATION [2] L4701 9Y1211012INI0015US0 I-16 KiSC issued 09, 2016 A...
  • Page 22 GENERAL KiSC issued 09, 2016 A...
  • Page 23 GENERAL CONTENTS 1. TRACTOR IDENTIFICATION....................... G-1 [1] MODEL NAME AND SERIAL NUMBERS ................G-1 (1) L3301/L3901........................G-1 (2) L4701..........................G-2 [2] E4B ENGINE .......................... G-3 [3] CYLINDER NUMBER ......................G-3 2. GENERAL PRECAUTIONS......................G-4 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING ........G-5 [1] WIRING ..........................
  • Page 24 [2] SPECIAL TOOLS FOR TRACTOR ..................G-89 9. TIRES ............................G-99 [1] TIRE PRESSURE ......................... G-99 [2] TREADS ADJUSTMENT ....................G-100 (1) L3301/L3901......................... G-100 (2) L4701..........................G-102 [3] TIRE LIQUID INJECTION....................G-106 10. IMPLEMENT LIMITATIONS ..................... G-109 KiSC issued 09, 2016 A...

  • Page 25: Tractor Identification

    L3301, L3901, L4701, WSM GENERAL 1. TRACTOR IDENTIFICATION [1] MODEL NAME AND SERIAL NUMBERS (1) L3301/L3901 When contacting your local KUBOTA distributor, always specify engine serial number, tractor serial number and hour meter reading. (1) Tractor Identification Plate (4) ROPS Identification Plate...

  • Page 26: L4701

    L3301, L3901, L4701, WSM GENERAL (2) L4701 When contacting your local KUBOTA distributor, always specify engine serial number, tractor serial number and hour meter reading. (1) Tractor Identification Plate (4) ROPS Identification Plate (2) Tractor Serial Number (ROPS Serial Number)

  • Page 27: E4B Engine

    L3301, L3901, L4701, WSM GENERAL [2] E4B ENGINE [Example: Engine Model Name V2403-CR-TE4] The emission controls previously implemented in various countries to prevent air pollution will be stepped up as Nonroad Emission Standards continue to change. The timing or applicable date of the specific Nonroad Emission regulations depends on the engine output classification.

  • Page 28: General Precautions

    L3301, L3901, L4701, WSM GENERAL 2. GENERAL PRECAUTIONS • When you disassemble, carefully put the parts in a clean area to make it easy to find the parts. You must install the screws, bolts and nuts in their initial position to prevent the reassembly errors.

  • Page 29: Handling Precautions For Electrical Parts And Wiring

    L3301, L3901, L4701, WSM GENERAL 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING To ensure safety and prevent damage to the machine and surrounding equipment, obey the following precautions in handling electrical parts and wiring. IMPORTANT • Check electrical wiring for damage and loosened connection every year.
  • Page 30 L3301, L3901, L4701, WSM GENERAL • Repair or change torn or aged wiring immediately. (1) Aged (3) Insulating Vinyl Tape (2) Torn WSM000001GEG0065US0 • Securely insert grommet. (1) Grommet (A) Correct (B) Incorrect WSM000001GEG0066US0 • Securely clamp, being careful not to damage wiring.

  • Page 31: Battery

    L3301, L3901, L4701, WSM GENERAL [2] BATTERY • Be careful not to confuse positive and negative terminal posts. • When you remove battery cables, disconnect negative cable first. When you install battery cables, check for polarity and connect positive cable first.

  • Page 32: Circuit Tester

    L3301, L3901, L4701, WSM GENERAL • Use sandpaper to remove rust from terminals. • Repair deformed terminal. Make sure that there is no terminal being exposed or displaced. (1) Exposed Terminal (3) Sandpaper (2) Deformed Terminal (4) Rust WSM000001GEG0075US0 • Make sure that there is no female connector being too open.

  • Page 33: Color Of Wiring

    L3301, L3901, L4701, WSM GENERAL [6] COLOR OF WIRING • Colors of wire are specified to the color codes. • This symbol of "/" shows color with stripe (s). (An example) Red stripe on white color: W/R Color of wiring...

  • Page 34: Lubricants, Fuel And Coolant

    L3301, L3901, L4701, WSM GENERAL 4. LUBRICANTS, FUEL AND COOLANT [1] L3301/L3901 Capacity Place Lubricants, fuel and coolant L3301 L3901 42.0 L • No. 2-D S15 diesel fuel Fuel 11.0 U.S.gals • No. 1-D S15 diesel fuel if temperature is 9.24 Imp.gals...

  • Page 35: L4701

    L3301, L3901, L4701, WSM GENERAL [2] L4701 Capacity Place Lubricants, fuel and coolant L4701 51.0 L • No. 2-D S15 diesel fuel Fuel 13.5 U.S.gals • No. 1-D S15 diesel fuel if temperature is 11.2 Imp.gals below –10 °C (14 °F) 6.5 L...
  • Page 36 L3301, L3901, L4701, WSM GENERAL NOTE Engine Oil: • Oil used in the engine should have an American Petroleum Institute (API) service classification and Proper SAE Engine Oil according to the ambient temperatures as shown above. • Refer to the following table for the suitable API classification engine oil according to the engine type (with DPF (Diesel Particulate FIlter) type engines) and the fuel.

  • Page 37: Tightening Torques

    L3301, L3901, L4701, WSM GENERAL 5. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Tighten screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual according to the table below. Indication on top of bolt...

  • Page 38: Metric Screws, Bolts And Nuts

    L3301, L3901, L4701, WSM GENERAL [3] METRIC SCREWS, BOLTS AND NUTS Grade Property class 8.8 Property class 10.9 Unit N·m kgf·m lbf·ft N·m kgf·m lbf·ft 24 to 27 2.4 to 2.8 18 to 20 30 to 34 3.0 to 3.5...

  • Page 39: Maintenance Check List

    L3301, L3901, L4701, WSM GENERAL 6. MAINTENANCE CHECK LIST [1] L3301/L3901 Indication on hour meter Refer- Impor- Item Interval ence tant 50 100 150 200 250 300 350 400 450 500 550 600 650 700 page every   ...
  • Page 40 L3301, L3901, L4701, WSM GENERAL Indication on hour meter Refer- Impor- Item Interval ence tant 50 100 150 200 250 300 350 400 450 500 550 600 650 700 page every  21 Fuel filter Replace G-39 400 Hr every ...
  • Page 41 L3301, L3901, L4701, WSM GENERAL IMPORTANT • The jobs indicated by  must be done after the first 50 hours of operation. • *1: Air cleaner should be cleaned more often in dusty conditions than in normal conditions. • *2: Every 1,000 hours or every 1 year, whichever comes first.

  • Page 42: L4701

    L3301, L3901, L4701, WSM GENERAL [2] L4701 Indication on hour meter Refer- Impor- Item Interval ence tant 50 100 150 200 250 300 350 400 450 500 550 600 650 700 page every       ...
  • Page 43 L3301, L3901, L4701, WSM GENERAL Indication on hour meter Refer- Impor- Item Interval ence tant 50 100 150 200 250 300 350 400 450 500 550 600 650 700 page every  20 Water separator Clean G-66 400 Hr every ...
  • Page 44 L3301, L3901, L4701, WSM GENERAL IMPORTANT • The jobs indicated by  must be done after the first 50 hours of operation. • *1: Air cleaner should be cleaned more often in dusty conditions than in normal conditions. • *2: Every 1,000 hours or every 1 year, whichever comes first.

  • Page 45: Check And Maintenance

    L3301, L3901, L4701, WSM GENERAL 7. CHECK AND MAINTENANCE [1] L3301/L3901 CAUTION • Be sure to check and service the tractor on a flat place with engine shut off and pull the parking brake on and chock the wheels. 9Y1211012GEG0054US0 (1) Daily Check To prevent trouble from occurring, it is important to know the condition of the tractor.
  • Page 46 L3301, L3901, L4701, WSM GENERAL Checking Water Separator 1. As water is collected in the water separator, the red float is raised. 2. When the red float has reached the white line, close the fuel valve, loosen the retainer ring, take out the cup, and clean the cup.
  • Page 47 L3301, L3901, L4701, WSM GENERAL Checking Transmission Fluid Level 1. Park the machine on a flat surface, lower the implement and shut off engine. 2. To check the oil level, draw out the dipstick, wipe it clean, replace it, and draw it out again. Check to see that the oil level lies between the 2 notches.
  • Page 48 L3301, L3901, L4701, WSM GENERAL Cleaning Evacuator Valve 1. Open the evacuator valve to get rid of large particles of dust and dirt. (1) Evacuator Valve 9Y1211012GEG0064US0 Cleaning Grill and Radiator Screen CAUTION • Be sure to stop the engine before removing the screen.
  • Page 49 L3301, L3901, L4701, WSM GENERAL Checking Gauges, Meter and Easy Checker™ 1. Inspect the instrument panel for broken gauge(s), meter(s) and Easy Checker™ lamps. 2. Replace if broken. 9Y1211012GEG0068US0 Checking Head Light, Turn Signal / Hazard Light etc. 1. Inspect the lights for broken bulbs and lenses.

  • Page 50: Check Points Of Every 50 Hours

    L3301, L3901, L4701, WSM GENERAL (2) Check Points of Every 50 Hours Lubricating Grease Fittings 1. Apply a small amount of multipurpose grease to the following points every 50 hours: If you operated the machine in extremely wet and muddy conditions, lubricate grease fittings more often.
  • Page 51 L3301, L3901, L4701, WSM GENERAL Checking Engine Start System CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.  Preparation before testing 1. Place all control levers in the "NEUTRAL" position.
  • Page 52 L3301, L3901, L4701, WSM GENERAL Checking Operator Presence Control CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.  Preparation before testing 1. Place all control levers in the "NEUTRAL" position.

  • Page 53: Check Points Of Every 100 Hours

    L3301, L3901, L4701, WSM GENERAL (3) Check Points of Every 100 Hours Cleaning Air Cleaner Element [Single Element Type] 1. Remove the element. 2. Clean the element: – When dry dust adheres to the element, blow compressed air from the inside, turning the element. Pressure of compressed air must be under 205 kPa (2.1 kgf/cm...
  • Page 54 (1) Fuel Grommet 9Y1211012GEG0080US0 Adjusting Clutch Pedal  Adjusting procedure [with single clutch] [L3301 Manual Transmission Type], [HST Type] 1. Stop the engine and remove the key. 2. Slightly depress the clutch pedal and measure free travel at the top of pedal stroke.
  • Page 55 L3301, L3901, L4701, WSM GENERAL Adjusting Brake Pedal CAUTION • Stop the engine and chock the wheels before checking brake pedal. 1. Release the parking brake. 2. Slightly depress the brake pedals and measure free travel at top of pedal stroke.
  • Page 56 L3301, L3901, L4701, WSM GENERAL Checking Battery Condition DANGER To avoid the possibility of battery explosion: For the refillable type battery, follow the instructions below. • Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark.
  • Page 57 L3301, L3901, L4701, WSM GENERAL Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.

  • Page 58: Check Points Of Every 200 Hours

    L3301, L3901, L4701, WSM GENERAL (4) Check Points of Every 200 Hours Replacing Transmission Oil Filter [HST Type] CAUTION • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 59 L3301, L3901, L4701, WSM GENERAL Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position. 3. Lower the implement, lock the park brake and stop the engine. 4. Measure distance between tire beads at front of tire, at hub height.

  • Page 60: Check Points Of Every 400 Hours

    L3301, L3901, L4701, WSM GENERAL (5) Check Points of Every 400 Hours Changing Engine Oil CAUTION • Be sure to stop the engine before changing the oil. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 61 L3301, L3901, L4701, WSM GENERAL Changing Transmission Fluid / Replacing Hydraulic Oil Filter  Cleaning Magnetic Filter CAUTION • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 62 L3301, L3901, L4701, WSM GENERAL (Continued) (4) Dipstick [C] Manual Transmission Type (5) Oil Inlet [D] HST Type (A) Oil level is acceptable within this range. 9Y1211012GEG0094US0 G-38 KiSC issued 09, 2016 A...

  • Page 63: Check Point Of Every 600 Hours

    L3301, L3901, L4701, WSM GENERAL Replacing Fuel Filter 1. Remove the fuel filter. 2. Put a film of clean fuel on rubber seal of new filter. 3. Tighten the filter quickly until it contacts the mounting surface. Tighten filter by hand an additional 1/2 turn only.

  • Page 64: Check Point Of Every 800 Hours

    L3301, L3901, L4701, WSM GENERAL (7) Check Point of Every 800 Hours Adjusting Engine Valve Clearance • See "Valve Clearance" on page 1-S12. 9Y1211012GEG0100US0 Changing Front Axle Case Oil [4WD] 1. To drain the used oil, remove the right and left drain plugs and filling plug at the front axle case and let out the oil completely into the oil pan.

  • Page 65: Check Points Of Every 3000 Hours

    L3301, L3901, L4701, WSM GENERAL (9) Check Points of Every 3000 Hours Checking Supply Pump • See page "Supply Pump" on page 1-S49. 9Y1211012GEG0105US0 Checking and Cleaning EGR System • See "EGR Valve" on page 1-S40. 9Y1211012GEG0106US0 Cleaning DPF Muffler ...
  • Page 66 L3301, L3901, L4701, WSM GENERAL Checking Radiator Hose and Clamp Check to see if radiator hoses are properly fixed every 200 hours of operation or 6 months, whichever comes first. 1. If hose clamps are loose or water leaks, tighten bands securely.

  • Page 67: Check Points Of Every 2000 Hours Or 2 Years

    L3301, L3901, L4701, WSM GENERAL Checking Power Steering Line [Manual Transmission Type] 1. Check to see that all lines and hose clamps are tight and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once.
  • Page 68 L3301, L3901, L4701, WSM GENERAL Anti-Freeze CAUTION To avoid personal injury: • When using antifreeze, put on some protection such as rubber gloves. (Antifreeze contains poison.) • If it is swallowed, seek immediate medical help. Do NOT make a person throw up unless told to do so by poison control or a health care professional.

  • Page 69: Check Points Of Every 2 Years

    L3301, L3901, L4701, WSM GENERAL (Continued) 5. Adding the LLC a) Add only water if the mixture reduces in amount by evaporation b) If there is a mixture leak, add the LLC of the same manufacturer and type in the same mixture percentage.

  • Page 70: Others

    L3301, L3901, L4701, WSM GENERAL (15) Others Bleeding Fuel System Air must be removed: 1. When the fuel filter or lines are removed. 2. When water is drained from water separator. 3. When tank is completely empty. 4. After the tractor has not been used for a long period of time.
  • Page 71 L3301, L3901, L4701, WSM GENERAL Replacing Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system. 2. If any of the fuses should blow, replace with a new one of the same capacity.
  • Page 72 L3301, L3901, L4701, WSM GENERAL Replacing Head Lamp CAUTION To avoid personal injury: • Be careful not to drop the bulb, hit anything against the lamp, apply excess force, and get the lamp scratched. If broken, glass may cause injury.
  • Page 73 L3301, L3901, L4701, WSM GENERAL Replacing Oil Separator Hose • Replace if any deterioration (crack, hardening, scar of deformation) or damage occurred. (See page G-42.) 9Y1211012GEG0204US0 G-49 KiSC issued 09, 2016 A...

  • Page 74: L4701

    L3301, L3901, L4701, WSM GENERAL [2] L4701 CAUTION • Be sure to check and service the tractor on a flat place with engine shut off and pull the parking brake on and chock the wheels. 9Y1211012GEG0054US0 (1) Daily Check To prevent trouble from occurring, it is important to know the condition of the tractor. Check the following items before starting.
  • Page 75 L3301, L3901, L4701, WSM GENERAL Checking Water Separator 1. As water is collected in the water separator, the red float is raised. 2. When the red float has reached the white line, close the fuel valve, loosen the retainer ring, take out the cup, and clean the cup.
  • Page 76 L3301, L3901, L4701, WSM GENERAL Checking Coolant Level CAUTION • Do not remove radiator cap while coolant is hot. When cool, slowly rotate cap to the first stop and allow sufficient time for excess pressure to escape before removing the cap completely.
  • Page 77 L3301, L3901, L4701, WSM GENERAL Checking DPF Muffler CAUTION • Before checking or cleaning the DPF muffler, stop the engine and wait long enough until it is cooled down. 1. Check the DPF muffler and its surroundings for build-up of anything flammable.
  • Page 78 L3301, L3901, L4701, WSM GENERAL Checking and Cleaning of Electrical Wiring and Battery Cables CAUTION • A loosened terminal or connector, or damaged wire may affect the performance of electrical components or cause short circuits. Leakage of electricity could result in a fire hazard, a dead battery or damage to electrical components.

  • Page 79: Check Points Of Every 50 Hours

    L3301, L3901, L4701, WSM GENERAL (2) Check Points of Every 50 Hours Lubricating Grease Fittings 1. Apply a small amount of multipurpose grease to the following points every 50 hours: If you operated the machine in extremely wet and muddy conditions, lubricate grease fittings more often.
  • Page 80 L3301, L3901, L4701, WSM GENERAL Checking Engine Start System CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.  Preparation before testing 1. Place all control levers in the "NEUTRAL" position.
  • Page 81 L3301, L3901, L4701, WSM GENERAL Checking Wheel Bolt Torque CAUTION • Never operate tractor with a loose rim, wheel, or axle. • Any time bolts and nuts are loosened, retighten to specified torque. • Check all bolts and nuts frequently and keep them tight.

  • Page 82: Check Points Of Every 100 Hours

    L3301, L3901, L4701, WSM GENERAL (3) Check Points of Every 100 Hours Cleaning Air Cleaner Primary Element 1. Remove the air cleaner cover and primary element. 2. Clean the primary element: – When dry dust adheres to the element, blow compressed air from the inside, turning the element.
  • Page 83 L3301, L3901, L4701, WSM GENERAL Checking Fuel Grommet 1. Check the grommets for cracks and fuel leak. 2. If any of such problems is found, replace the grommet(s) with new one(s). (1) Fuel Grommet 9Y1211012GEG0150US0 Adjusting Clutch Pedal [Manual Transmission Type] ...
  • Page 84 L3301, L3901, L4701, WSM GENERAL Checking Battery Condition DANGER To avoid the possibility of battery explosion: For the refillable type battery, follow the instructions below. • Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark.
  • Page 85 L3301, L3901, L4701, WSM GENERAL Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.

  • Page 86: Check Points Of Every 200 Hours

    L3301, L3901, L4701, WSM GENERAL (4) Check Points of Every 200 Hours Replacing Transmission Oil Filter [HST Type] CAUTION • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 87 L3301, L3901, L4701, WSM GENERAL Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position. 3. Lower the implement, lock the park brake and stop the engine. 4. Measure distance between tire beads at front of tire, at hub height.

  • Page 88: Check Points Of Every 400 Hours

    L3301, L3901, L4701, WSM GENERAL (5) Check Points of Every 400 Hours Changing Engine Oil CAUTION • Be sure to stop the engine before changing the oil. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 89 L3301, L3901, L4701, WSM GENERAL Changing Transmission Fluid / Replacing Hydraulic Oil Filter  Cleaning Magnetic Filter CAUTION • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.

  • Page 90: Check Point Of Every 600 Hours

    L3301, L3901, L4701, WSM GENERAL Replacing Fuel Filter 1. Remove the fuel filter. 2. Put a film of clean fuel on rubber seal of new filter. 3. Tighten the filter quickly until it contacts the mounting surface. Tighten filter by hand an additional 1/2 turn only.

  • Page 91: Check Point Of Every 800 Hours

    L3301, L3901, L4701, WSM GENERAL (7) Check Point of Every 800 Hours Adjusting Engine Valve Clearance • See "Valve Clearance" on page 1-S12. 9Y1211012GEG0100US0 Changing Front Axle Case Oil [4WD] 1. To drain the used oil, remove the right and left drain plugs and filling plug at the front axle case and drain the oil completely into the oil pan.

  • Page 92: Check Points Of Every 3000 Hours

    L3301, L3901, L4701, WSM GENERAL (9) Check Points of Every 3000 Hours Checking Supply Pump • See page "Supply Pump" on page 1-S49. 9Y1211012GEG0105US0 Checking and Cleaning EGR System • See "EGR Valve" on page 1-S40. 9Y1211012GEG0106US0 Cleaning DPF Muffler ...
  • Page 93 L3301, L3901, L4701, WSM GENERAL Checking Radiator Hose and Clamp Check to see if radiator hoses are properly fixed every 200 hours of operation or 6 months, whichever comes first. 1. If hose clamps are loose or water leaks, tighten bands securely.
  • Page 94 L3301, L3901, L4701, WSM GENERAL Checking Power Steering Line 1. Check to see that all lines and hose clamps are tight and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once.

  • Page 95: Check Points Of Every 2000 Hours Or 2 Years

    L3301, L3901, L4701, WSM GENERAL (12) Check Points of Every 2000 Hours or 2 Years Flushing Cooling System and Changing Coolant CAUTION To avoid personal injury: • Do not remove radiator cap while coolant is hot. When cool, slowly rotate cap to the first stop and allow sufficient time for excess pressure to escape before removing the cap completely.
  • Page 96 L3301, L3901, L4701, WSM GENERAL Anti-Freeze CAUTION To avoid personal injury: • When using antifreeze, put on some protection such as rubber gloves. (Antifreeze contains poison.) • If it is swallowed, seek immediate medical help. Do NOT make a person throw up unless told to do so by poison control or a health care professional.

  • Page 97: Check Points Of Every 2 Years

    L3301, L3901, L4701, WSM GENERAL (Continued) 5. Adding the LLC a) Add only water if the mixture reduces in amount by evaporation b) If there is a mixture leak, add the LLC of the same manufacturer and type in the same mixture percentage.
  • Page 98 L3301, L3901, L4701, WSM GENERAL (15) Others Bleeding Fuel System Air must be removed: 1. When the fuel filter or lines are removed. 2. When water is drained from water separator. 3. When tank is completely empty. 4. After the tractor has not been used for a long period of time.
  • Page 99 L3301, L3901, L4701, WSM GENERAL Replacing Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system. 2. If any of the fuses should blow, replace with a new one of the same capacity.
  • Page 100 L3301, L3901, L4701, WSM GENERAL Replacing Head Lamp NOTE To avoid personal injury: • Be careful not to drop the bulb, hit anything against the lamp, apply excess force, and get the lamp scratched. If broken, glass may cause injury. Pay more attention to halogen lamps in particular, which have high pressure inside.
  • Page 101 L3301, L3901, L4701, WSM GENERAL Replacing Oil Separator Hose • Replace if any deterioration (crack, hardening, scar of deformation) or damage occurred. (See page G-69.) 9Y1211012GEG0211US0 G-77 KiSC issued 09, 2016 A...

  • Page 102: Special Tools

    L3301, L3901, L4701, WSM GENERAL 8. SPECIAL TOOLS [1] SPECIAL TOOLS FOR ENGINE Special Use Puller Set Code No. • 07916-09032 Application • Use exclusively to pull out bearing, gears and other parts with ease. WSM000001GEG0011US0 Piston Ring Compressor Code No.
  • Page 103 L3301, L3901, L4701, WSM GENERAL Oil Pressure Tester Code No. • 07916-32032 Application • Use to measure lubricating oil pressure. (1) Gauge (5) Adaptor 2 (2) Cable (6) Adaptor 3 (3) Threaded Joint (7) Adaptor 4 (4) Adaptor 1 (8) Adaptor 5...
  • Page 104 L3301, L3901, L4701, WSM GENERAL Plastigauge Code No. • 07909-30241 Application • Use to check the oil clearance between crankshaft and bearing, etc.. Measuring range • Green: 0.03 to 0.07 mm (0.001 to 0.003 in.) • Red: 0.05 to 0.1 mm (0.002 to 0.006 in.) •...
  • Page 105 L3301, L3901, L4701, WSM GENERAL Auxiliary Socket for Fixing Crankshaft Sleeve Application • To fix the crankshaft sleeve of the diesel engine. 80.0 mm (3.15 in.) 60.10 to 60.30 mm (2.367 to 2.374 in.) 80.0 mm dia. (3.15 in. dia.) 85.0 mm dia.
  • Page 106 L3301, L3901, L4701, WSM GENERAL (Continued) Application • To fix the crankshaft sleeve of the diesel engine. 42.0 mm (1.65 in.) 30.50 to 30.60 mm (1.201 to 1.204 in.) 23.0 mm (0.906 in.) 20.0 mm (0.787 in.) 2.0 mm (0.079 in.) 31.911 to 31.950 mm dia.
  • Page 107 L3301, L3901, L4701, WSM GENERAL Valve Guide Replacing Tool Application • To press out and press fit the valve guide. 225 mm (8.86 in.) 70 mm (2.8 in.) 45 mm (1.8 in.) 20 mm dia. (0.79 in. dia.) 12.7 to 12.9 mm dia. (0.500 to 0.507 in. dia.) 7.50 to 7.60 mm dia.
  • Page 108 L3301, L3901, L4701, WSM GENERAL Crankshaft Bearing 1 Replacing Tool Application • To press out and press fit the crankshaft bearing 1. [1] Extracting tool 135 mm (5.31 in.) 72 mm (2.8 in.) 40 mm radius (1.6 in. radius) 10 mm (0.39 in.) 20 mm (0.79 in.)
  • Page 109 L3301, L3901, L4701, WSM GENERAL Balancer Metal Replacing Tool (for Removing) Application • To remove the metal bearing. 41 mm (1.6 in.) 41.934 to 41.950 mm dia. (1.6510 to 1.6515 in. dia.) 32.5 mm (1.28 in.) 24.959 to 24.980 mm dia. (0.98264 to 0.98346 in. dia.) Chamfer 0.3 mm (0.01 in.)
  • Page 110 L3301, L3901, L4701, WSM GENERAL Balancer Metal Replacing Tool (for Fitting) Application • To press fit the metal bearing. 182 mm (7.17 in.) 60 mm dia. (2.4 in. dia.) 140 mm (5.51 in.) 46.950 to 46.975 mm dia. (1.8485 to 1.8494 in. dia.) 37 mm (1.5 in.)
  • Page 111 L3301, L3901, L4701, WSM GENERAL Injection Top Correction Jig Application • To detects and position the sensor in top-dead center position. 60 mm (2.4 in.) 45 mm (1.8 in.) 37.3 mm (1.47 in.) 3.5 mm (1.4 in.) 12 mm dia. (0.47 in. dia.) 10 mm dia.
  • Page 112 L3301, L3901, L4701, WSM GENERAL Bearing Case Cover Oil Seal Replacing Tool Application • To install bearing case cover oil seal. 42 mm dia. (1.7 in. dia.) 129 mm dia. (5.08 in. dia.) 32 to 32.025 mm dia. (1.260 to 1.261 in. dia.) 31.950 to 31.975 mm dia.

  • Page 113: Special Tools For Tractor

    L3301, L3901, L4701, WSM GENERAL [2] SPECIAL TOOLS FOR TRACTOR Tie-rod End Lifter Code No. • 07909-39051 Application • Use to remove the tie-rod end with ease. WSM000001GEG0029US0 Steering Wheel Puller Code No. • 07916-51090 Application • Use to remove the steering wheel without damage to the steering shaft.
  • Page 114 L3301, L3901, L4701, WSM GENERAL Rear Axle Cover Puller Code No. • 07916-51041 Application • Use to remove a rear axle cover from rear axle. WSM000001GEG0035US0 Relief Valve Pressure Tester Code No. • 07916-50045 Application • This allows easy measurement of relief set pressure.
  • Page 115 L3301, L3901, L4701, WSM GENERAL Rear Axle Nut Wrench 71 Code No. • 07916-52531 Application • Use to remove and tighten a rear axle nut. WSM000001GEG0040US0 Relief Valve Setting Pressure Adaptor G Code No. • 07916-52751 Application • This allows easy measurement of relief valve setting pressure from the hydraulic coupler.
  • Page 116 L3301, L3901, L4701, WSM GENERAL Hydraulic Arm Shaft Bushing Press-Fitting Tool Application • Use for replacing the hydraulic arm shaft bushings in the hydraulic cylinder body. NOTE • The special tools are not available, so make them. Refer to the figure.
  • Page 117 L3301, L3901, L4701, WSM GENERAL Pump Adaptor Application • Use for examining the main hydraulic pump. NOTE • When you use, attach with following parts. O-ring: 04811-00180 • This adaptor is changed from Adaptor 61 of flowmeter adaptor set (see page G-90).
  • Page 118 L3301, L3901, L4701, WSM GENERAL Cylinder Safety Valve Setting Pressure Adaptor Application • Use for setting the safety valve to the nozzle tester to measure cracking pressure and check oil tightness of the safety valves. NOTE • This special tool is not provided, so make it referring to the figure.
  • Page 119 L3301, L3901, L4701, WSM GENERAL Pump Adaptor 2 Application • Use for checking the relief valve of power steering. NOTE • This special tool is not provided, so make it referring to the figure. 11 mm dia. (0.43 in. dia.) 10 mm dia.
  • Page 120 L3301, L3901, L4701, WSM GENERAL Dual Clutch Assembling Tool Application • Use for disassembling and assembling dual clutch assembly. NOTE • When using, attach 3 spacers (5) to "I" part of table (1) by using M6 × 1.0 flat head screw.
  • Page 121 L3301, L3901, L4701, WSM GENERAL Rear Propeller Shaft Tool Application • For installing bearing, oil seals and sleeves on rear propeller shaft. Bearing and oil seal:(1) Sleeves: (1) and (2) 40 mm dia. (1.57 in. dia.) 26 mm dia. (1.02 in. dia.) 36 mm dia.
  • Page 122 L3301, L3901, L4701, WSM GENERAL Check and High Pressure Relief Valve Assembly Tool Application • Use for readjusting relief valve pressure. 30 mm (1.2 in.) Chamfer 0.4 mm (0.02 in.) 0.17 rad (10 °) 21 mm (0.83 in.) Chamfer 3 mm (0.1 in.) Chamfer 0.3 mm (0.01 in.)

  • Page 123: Tires

    L3301, L3901, L4701, WSM GENERAL 9. TIRES [1] TIRE PRESSURE WARNING To avoid personal injury: • Do not attempt to mount a tire on a rim. This should be done by a qualified person with the proper equipment. • Always maintain the correct tire pressure.

  • Page 124: Treads Adjustment

    L3301, L3901, L4701, WSM GENERAL [2] TREADS ADJUSTMENT CAUTION To avoid personal injury: • When working on slopes or working with trailer, set the wheel tread as wide as practice for the job for maximum stability. • Support tractor securely on stands before removing a wheel.
  • Page 125 L3301, L3901, L4701, WSM GENERAL [B] Rear Wheels Rear tread width can be adjusted with the tires listed below. To change the tread width 1. Remove the wheel rim and / or disk mounting bolts. 2. Change the position of the rim and / or disk (right and left) to the desired position, and tighten the bolts.

  • Page 126: L4701

    L3301, L3901, L4701, WSM GENERAL (2) L4701 [A] Front Wheels Front Wheels (2WD Model) Front tread can be adjusted in 4 steps. Models 6.00-16 1210 mm (47.6 in.) 1310 mm (51.6 in.) 1410 mm (55.5 in.) 1510 mm (59.4 in.) Farm 7.5L-15...
  • Page 127 L3301, L3901, L4701, WSM GENERAL To adjust the tread. 1. Lift the front of the tractor with a jack. 2. Remove the front axle mounting bolts (1) and the tie-rod mounting bolts (2). 3. Move the front axles (right and left) to the desired position, and tighten the bolts.
  • Page 128 L3301, L3901, L4701, WSM GENERAL Front Wheels (4WD Model) Front tread can not be adjusted. 8.3-16 27 x 8.50-15 27 x 10.50LL15 10-16.5 305R343 Tire Farm Turf Turf Industrial Turf 1155 mm 1200 mm 1180 mm 1195 mm 1305 mm Tread (45.5 in.)
  • Page 129 L3301, L3901, L4701, WSM GENERAL [B] Rear Wheels Rear tread can be adjusted in 6 steps. Models 14.9-24 1180 mm (46.5 in.) 1200 mm (47.2 in.) 1300 mm (51.2 in.) 1450 mm (57.1 in.) 1545 mm (60.8 in.) Farm 17.5L-24 –...

  • Page 130: Tire Liquid Injection

    L3301, L3901, L4701, WSM GENERAL [3] TIRE LIQUID INJECTION Auxiliary weights can be used to increase traction force for plowing in fields or clayey ground. Another way is to inject water or another liquid, such as a calcium chloride solution in the tires. Water must not be used in winter since it freezes at 0 °C (32 °F).
  • Page 131 L3301, L3901, L4701, WSM GENERAL Injection CAUTION • When a calcium chloride solution is used, cool it before pouring it into the tire. • Do not fill tires with water or solution more than 75 % of full capacity (to the valve stem level).
  • Page 132 L3301, L3901, L4701, WSM GENERAL Draining Water or Solution 1. Lift the rear tires off the ground. 2. Turn the tire so that the air valve is at the bottom. 3. Remove the air valve, and drain liquid (liquid can only be drained to the level of the valve and liquid under that level remains inside).

  • Page 133: Implement Limitations

    L3301, L3901, L4701, WSM GENERAL 10. IMPLEMENT LIMITATIONS The KUBOTA Tractor has been thoroughly tested for proper performance with implements sold or approved by KUBOTA. Use with implements which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Tractor may result in malfunctions or failures of the tractor, damage to other property and injury to the operator or others.
  • Page 134 L3301, L3901, L4701, WSM GENERAL Implement Remarks L3301 L3901 L4701 Max. Load 1000 kg (2200 lbs) 3000 kg (6600 lbs) Capacity Trailer Max. Drawbar 330 kg (730 lbs) 650 kg (1430 lbs) Load Max. Cutting 1829 mm (72 in.) 1829 mm (72 in.)
  • Page 135 L3301, L3901, L4701, WSM GENERAL Implement Remarks L3301 L3901 L4701 Max. Lifting 460 kg (1014 lbs) 700 kg (1545 lbs) Capacity 18.0 MPa Front-end Loader Max. Oil 15.9 MPa (162 kgf/cm , 2311 psi) (184 kgf/cm Pressure 2560 psi) Sub Frame...
  • Page 136 ENGINE KiSC issued 09, 2016 A...
  • Page 137 MECHANISM CONTENTS 1. FEATURES..........................1-M1 2. ENGINE BODY........................... 1-M2 [1] PISTON ..........................1-M2 [2] HALF-FLOATING HEAD COVER ..................1-M2 3. LUBRICATING SYSTEM......................1-M3 [1] OIL COOLER........................1-M3 4. COOLING SYSTEM ........................1-M4 [1] THERMOSTAT ........................1-M4 [2] BOTTOM BYPASS SYSTEM ....................1-M5 5.

  • Page 138: Features

    L3301, L3901, L4701, WSM ENGINE 1. FEATURES The diesel engines have the features of low cost and high efficiency. On the other hand, it is said that an amount of the nitrogen oxide (NOx) and particulate matter (PM) contained in their exhaust gas is relatively...

  • Page 139: Engine Body

    L3301, L3901, L4701, WSM ENGINE 2. ENGINE BODY [1] PISTON The piston skirt has a layer of molybdenum disulfide , which decreases the piston slap noise and thus the all the engine noise.  Molybdenum disulfide (MoS The molybdenum disulfide (1) is a solid lubricant, like Graphite or Teflon.

  • Page 140: Lubricating System

    L3301, L3901, L4701, WSM ENGINE 3. LUBRICATING SYSTEM [1] OIL COOLER The engine is equipped with a water-cooled oil cooler to keep the temperature of the oil from rising while the engine is operating and provide it with proper lubrication.

  • Page 141: Cooling System

    L3301, L3901, L4701, WSM ENGINE 4. COOLING SYSTEM [1] THERMOSTAT This thermostat uses a wax-pellet type. When temperature goes up, wax in metal container (pellet) changes to a liquid from a solid. The volume starts to expand in this process. As spindle is fixed, pellet goes down and valve goes down.

  • Page 142: Bottom Bypass System

    L3301, L3901, L4701, WSM ENGINE [2] BOTTOM BYPASS SYSTEM In addition to improving the cooling performance of the radiator by using a bottom bypass system, the mechanism uses a 3-stage thermostat valve that reduces thermal shock considerably compared to previous radiators.

  • Page 143: Fuel System

    L3301, L3901, L4701, WSM ENGINE 5. FUEL SYSTEM [1] OVERVIEW OF COMMON RAIL SYSTEM (1) Fuel Tank (2) Water Separator (3) Electromagnetic Pump (4) Check Valve (5) Fuel Sub Tank (6) Fuel Cooler (7) Feed Pump (8) Fuel Filter (9) Supply Pump...
  • Page 144 L3301, L3901, L4701, WSM ENGINE Separator The separator has a function of separating fuel and water through difference in specific gravity. There is a read float (7) with a specific weight of 0.9 made of a polypropylene material inside that has properties in that it is heavier than diesel and lighter than water.

  • Page 145: Supply Pump

    L3301, L3901, L4701, WSM ENGINE Feed Pump The feed pump (1) is installed after the fuel cooler and has a function of suctioning fuel from the fuel tank and feeding it through a filter and to the supply pump.  Operating During the up stroke, the piston (4) is pushed up by the fuel cam (7) via the tappet (6) and push rod (12).
  • Page 146 L3301, L3901, L4701, WSM ENGINE Suction Control Valve (SCV) (1) Cylinder Part (2) Solenoid (3) Armature (4) Discharge Port (5) Piston (6) Cylinder (7) Suction Port High Suction Volume Low Suction Volume Large Small (A) To pressurizing section (B) From fuel pump...
  • Page 147 L3301, L3901, L4701, WSM ENGINE Overflow Valve When the pressure of fuel delivered from the feed pump rises above a prescribed amount, the overflow valve has a function of returning fuel to the tank and is made up of a valve body (2), valve piston (5), spring (3), and ball (1).

  • Page 148: Rail

    L3301, L3901, L4701, WSM ENGINE [3] RAIL The rail (2) stores fuel at the high pressure applied by the supply pump and the injectors of each cylinder. The rail incorporates control parts-a rail pressure sensor (3) and a pressure limiter (1).

  • Page 149: Injector

    L3301, L3901, L4701, WSM ENGINE [4] INJECTOR General The injectors inject high-pressure fuel sent from the rail into the combustion chamber of the engine. The injections are controlled by the signal of engine's ECU to produce the ideal timing, amount of fuel, mixture and spray.
  • Page 150 L3301, L3901, L4701, WSM ENGINE Injector Structure Injectors consist of nozzle components (nozzle body (6), needle valve (7), nozzle spring (12), nozzle nut (13)) and control components (control chamber (3), solenoid (9), valve spring (8), TWV (Two Way Valve) (10), valve ball (1), valve body (4), command piston (5), suction orifice (11), discharge orifice (2).
  • Page 151 L3301, L3901, L4701, WSM ENGINE Injector Operation  No Injection While the solenoid (2) is not electrified, the two way electromagnetic valve (3) is pushed down by the valve spring (1) and the discharge orifice (11) path is closed by the valve ball (4).
  • Page 152 L3301, L3901, L4701, WSM ENGINE Injector Drive Circuit To increase the responsiveness of the injector, the voltage that drives the injector is raised to a high voltage, accelerating the magnetization of the solenoid and increasing the responsiveness of the TWV.

  • Page 153: Engine Control System

    L3301, L3901, L4701, WSM ENGINE [5] ENGINE CONTROL SYSTEM (1) Key Switch (14) Rail (25) Temperature Sensor (A) Main ECU (2) Acceleration Sensor (15) Rail Pressure Limiter (DPF Outlet Exhaust (B) Engine ECU (3) DPF INHIBIT Switch (16) Air Flow Sensor...

  • Page 154: Engine Ecu

    L3301, L3901, L4701, WSM ENGINE (1) Engine ECU The engine ECU (1) controls the amount, timing, mixture and pressure of fuel that is injected. The engine ECU (1) operates each kind of control based on the signals from each type of sensor.
  • Page 155 L3301, L3901, L4701, WSM ENGINE Camshaft Position Sensor The cam position sensor (1) is mounted near the supply pump gear of the gear case and the sensor functions in the same way as the crank position sensor. This sensor detects the teeth of the pulsar gear (2) and the engine ECU uses this signal to calculate the cam angle.

  • Page 156: Egr System

    L3301, L3901, L4701, WSM ENGINE 6. EGR SYSTEM [1] OVERVIEW (1) Air Cleaner (6) Crankshaft Position Sensor (11) EGR Cooler Exhaust Gas Flow (2) Air Flow Sensor (7) Camshaft Position Sensor (12) EGR Pipe Intake Air Flow (3) Intake Throttle Valve...

  • Page 157: Egr Cooler

    L3301, L3901, L4701, WSM ENGINE [2] EGR COOLER The EGR (Exhaust Gas Recirculation) cooler (1) is used to lower combustion temperature and efficiently cool EGR gas, with the aim of reducing the NOx that is in the exhaust gas of diesel engine.

  • Page 158: After Treatment System

    L3301, L3901, L4701, WSM ENGINE 7. AFTER TREATMENT SYSTEM [1] AFTER TREATMENT DEVICES (1) Common Rail System (8) Temperature Sensor (11) Temperature Sensor (a) EGR Valve Opening (2) Engine ECU (DOC Inlet Exhaust (DPF Outlet Exhaust (b) Injection Pattern (3) After Treatment Devices...
  • Page 159 L3301, L3901, L4701, WSM ENGINE Auto Mode PARKED REGENER- REGENER- WARNING ATION INDI- ATION INDI- INDICATOR CATOR Buzzer CATOR Auto Mode State Interval Level 0 (No need Regeneration is not required sounding Regeneration) Level 1 The regeneration cycle begins and continues until ...
  • Page 160 L3301, L3901, L4701, WSM ENGINE Diesel Oxidation Catalyst (DOC) An oxidizing catalyst set in front of the Diesel Particulate Filter (DPF) step that uses post injection unburned fuel to actively regenerate the DPF. (1) Diesel Oxidation Catalyst (DOC) 9Y1211012ENM0041US0 Diesel Particulate Filter (DPF) The Diesel Particulate Filter (DPF) is a device that captures and combusts PM in the exhaust gas.
  • Page 161 L3301, L3901, L4701, WSM ENGINE Air Flow Sensor The amount of air intake required for control of the EGR valve used to reduce NOx is measured. 9Y1211012ENM0044US0 Temperature Sensor This is mounted on the DPF muffler and the DPF muffler DOC intake, DPF intake, and DPF discharge exhaust temperature, needed for the post processing system, are measured.
  • Page 162 L3301, L3901, L4701, WSM ENGINE Oil Separator Removes oil in the blowby gases that pass through the element (1) and the oil is returned to the oil pan. Blowby gases that pass through the element (1) are mixed into the intake upstream.
  • Page 163 SERVICING CONTENTS 1. TROUBLESHOOTING.........................1-S1 2. SERVICING SPECIFICATIONS ....................1-S4 3. TIGHTENING TORQUES......................1-S9 4. CHECKING AND ADJUSTING....................1-S11 [1] ENGINE BODY........................1-S11 [2] LUBRICATING SYSTEM.....................1-S13 [3] COOLING SYSTEM ......................1-S13 [4] PCV VALVE.........................1-S16 [5] EGR COOLER........................1-S16 [6] ACCELERATION SENSOR ....................1-S17 5. PREPARATION .........................1-S18 [1] SEPARATING DPF MUFFLER FROM TRACTOR .............1-S18 [2] SEPARATING ENGINE FROM CLUTCH HOUSING............1-S24 [3] SEPARATING ENGINE FROM FRONT AXLE FRAME ............1-S36 6.

  • Page 164: Troubleshooting

    L3301, L3901, L4701, WSM ENGINE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Engine Does Not No fuel Fill fuel G-21, G-50 Start Air in the fuel system Bleed G-46, G-74 Water in the fuel system Change fuel and –...
  • Page 165 L3301, L3901, L4701, WSM ENGINE Reference Symptom Probable Cause Solution Page Either Black or Dark Overload Decrease the load – Gray Exhaust Gas Is Low grade fuel used Use the specified fuel G-10, G-11 Observed Fuel filter clogged Change G-39, G-66...
  • Page 166 L3301, L3901, L4701, WSM ENGINE Reference Symptom Probable Cause Solution Page Engine Overheated Engine oil insufficient Fill oil prescribed level G-36, G-64 Fan belt broken or elongated Change or adjust 1-S13 Coolant insufficient Fill oil prescribed level 1-S24 Radiator net and radiator fin clogged with dust...

  • Page 167: Servicing Specifications

    L3301, L3901, L4701, WSM ENGINE 2. SERVICING SPECIFICATIONS ENGINE BODY Item Factory Specification Allowable Limit Valve Clearance (When Cold) 0.18 to 0.22 mm – 0.0071 to 0.0086 in. Compression Pressure 2.95 to 3.23 MPa / 2.35 MPa / (When You Crank the Engine with the Starter)
  • Page 168 L3301, L3901, L4701, WSM ENGINE Item Factory Specification Allowable Limit Valve Spring Free Length 41.7 to 42.2 mm 41.2 mm 1.65 to 1.66 in. 1.62 in. Setting Load / 118 N / 35.0 mm 100 N / 35.0 mm Setting Length 12.0 kgf / 35.0 mm...
  • Page 169 L3301, L3901, L4701, WSM ENGINE Item Factory Specification Allowable Limit Camshaft Side Clearance 0.070 to 0.22 mm 0.30 mm 0.0028 to 0.0086 in. 0.012 in. Camshaft Bend – 0.01 mm 0.0004 in. Height 33.90 mm 33.85 mm (Intake / Exhaust) 1.335 in.
  • Page 170 L3301, L3901, L4701, WSM ENGINE Item Factory Specification Allowable Limit Oil Ring Ring Gap 0.20 to 0.40 mm 1.25 mm 0.0079 to 0.015 in. 0.0492 in. Connecting Rod Alignment – 0.05 mm 0.002 in. Piston Pin to Small End Bushing Oil Clearance 0.014 to 0.036 mm...
  • Page 171 L3301, L3901, L4701, WSM ENGINE LUBRICATING SYSTEM Item Factory Specification Allowable Limit Engine Oil Pressure At Idle Speed More than 50 kPa 98 kPa 0.5 kgf/cm 1.0 kgf/cm 7 psi 14 psi At Rated Speed 300 to 440 kPa 250 kPa 3.0 to 4.5 kgf/cm...

  • Page 172: Tightening Torques

    L3301, L3901, L4701, WSM ENGINE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) [Tractor] Item N·m kgf·m...
  • Page 173 L3301, L3901, L4701, WSM ENGINE [ENGINE] Dimension × Item N·m kgf·m lbf·ft Pitch B terminal nut of starter M8 × 1.25 5.9 to 11 0.60 to 1.2 4.4 to 8.6 Injector clamp screw M8 × 1.25 24 to 27 2.4 to 2.8...

  • Page 174: Checking And Adjusting

    L3301, L3901, L4701, WSM ENGINE 4. CHECKING AND ADJUSTING [1] ENGINE BODY Compression Pressure 1. After warming-up the engine, remove the air cleaner, muffler, glow lead, and glow plugs. 2. Set a compression tester (1) (Code No.: 07909-39081) with the adaptor (2) to the glow plug hole.
  • Page 175 L3301, L3901, L4701, WSM ENGINE Valve Clearance IMPORTANT • You must check and adjust the valve clearance when the engine is cold. 1. Remove the head cover. 2. Align the "1TC" mark line (3) on the flywheel and timing mark (2) on the housing.

  • Page 176: Lubricating System

    L3301, L3901, L4701, WSM ENGINE [2] LUBRICATING SYSTEM Engine Oil Pressure 1. Remove the engine oil pressure switch, and set the oil pressure tester (Code No.: 07916-32032). (Adaptor screw: PT 1/8) 2. Operate the engine for warming-up. 3. Measure the oil pressure at the idle speed and rated speed.
  • Page 177 L3301, L3901, L4701, WSM ENGINE Fan Belt Damage and Wear 1. Check the fan belt for damage. 2. If the fan belt has a damage, replace it. 3. Check if the fan belt is worn out and sunk in the pulley groove.
  • Page 178 L3301, L3901, L4701, WSM ENGINE Opening-temperature of Thermostat Valve 1. Push down the thermostat valve and put the thread between the valve and the valve seat. 2. Put the thermostat and the thermometer in the container and increase the temperature of the water gradually.

  • Page 179: Pcv Valve

    L3301, L3901, L4701, WSM ENGINE [4] PCV VALVE PCV (Positive Crankcase Ventilation) Valve (Oil Separator) 1. Remove the cover (1) and PCV valve (spring and diaphragm) (2). 2. Check whether there is no damage of the spring and/or no breaking or damage of the diaphragm.

  • Page 180: Acceleration Sensor

    L3301, L3901, L4701, WSM ENGINE [6] ACCELERATION SENSOR Acceleration Sensor Wire Adjustment 1. Turn the key switch to OFF position and stop the engine. 2. Set the acceleration lever (1) to MAX rpm position. 3. Measure the clearance "A" between acceleration lever (1) and the sensor lever (2).

  • Page 181: Preparation

    L3301, L3901, L4701, WSM ENGINE 5. PREPARATION [1] SEPARATING DPF MUFFLER FROM TRACTOR Battery Negative Cable Connector 1. Open bonnet. 2. Disconnect battery negative cable connector (1). (1) Battery Negative Cable Connector 9Y1211012RAS0005US0 Bonnet and Side Covers 1. Disconnect the headlight connector (1).
  • Page 182 L3301, L3901, L4701, WSM ENGINE DPF Muffler 1. Disconnect connectors for differential pressure sensor (1) and DPF temperature sensors (2), (3), (4). 2. Remove front exhaust pipe (14). 3. Remove exhaust pipe (15). 4. Remove flange mount bolts (10) and flange mount nut (11).
  • Page 183 L3301, L3901, L4701, WSM ENGINE Filter Comp (DPF) (If necessary) IMPORTANT • Always work in the workshop equipped with a electric hoist (including mobile hoist). • Put a product (engine) on a stable ground, and set the parking brake. • As the DPF muffler full assembly is hot just after the engine shutdown, make sure to start operation after it gets cool.
  • Page 184 L3301, L3901, L4701, WSM ENGINE (Continued) (When reassembling) IMPORTANT • Replace the gaskets (11) with new ones. • If the differential pressure hoses (4), (6) are damaged or cracked, replace it. • When the differential pressure pipes (3), (7) and...
  • Page 185 L3301, L3901, L4701, WSM ENGINE Judgment of Reuse of Filter Comp (DPF) Before Cleaning (Service Dealer) IMPORTANT • Before ordering to a cleaning contractor, follow the procedure below to make a judgment on whether the DPF is reusable. 1. Check to see that the exhaust gas outlet side on the removed DPF is not darkened.
  • Page 186 L3301, L3901, L4701, WSM ENGINE Judgment of Reuse of Filter Comp (DPF) After Cleaning by Cleaning Contractor IMPORTANT • After the cleaning contractor has cleaned the filter comp DPF, they should measure the quantity of remaining ash in the following procedure, and evaluate the reusability.

  • Page 187: Separating Engine From Clutch Housing

    L3301, L3901, L4701, WSM ENGINE [2] SEPARATING ENGINE FROM CLUTCH HOUSING Draining Coolant CAUTION • Do not remove the radiator cap when the engine is hot. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
  • Page 188 L3301, L3901, L4701, WSM ENGINE Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 189 L3301, L3901, L4701, WSM ENGINE Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 190 L3301, L3901, L4701, WSM ENGINE Draining Engine Oil CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil. • Allow engine to cool down sufficiently, oil can be hot and can burn. 1. To drain the used oil, remove the drain plug (1) at the bottom of the engine and drain the oil completely into the oil pan.
  • Page 191 L3301, L3901, L4701, WSM ENGINE Battery Negative Cable Connector 1. Open bonnet. 2. Disconnect battery negative cable connector (1). (1) Battery Negative Cable Connector 9Y1211012RAS0005US0 Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS"...
  • Page 192 L3301, L3901, L4701, WSM ENGINE Steering Wheel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller. 2. Remove the throttle grip (4). 3. Disconnect the main switch (5). 4. Disconnect the combination switch (6). 5. Disconnect the DPF switches (2).
  • Page 193 L3301, L3901, L4701, WSM ENGINE Step and Center Cover (L3301/L3901) 1. Remove the center cover (4). 2. Disconnect the throttle cable from the throttle pedal (2). 3. Remove the HST pedal (7). 4. Disconnect the differential lock spring and rod from the differential lock lever (3).
  • Page 194 L3301, L3901, L4701, WSM ENGINE Hydraulic Pipes and Electrical Wiring (Under Fuel Tank Base and Left Side) 1. Disconnect the connectors of injector (5). 2. Disconnect the glow plug (4). 3. Disconnect the EGR valve (3). 4. Disconnect the air flow sensor (2).
  • Page 195 L3301, L3901, L4701, WSM ENGINE (Continued) (13) CCV Heater relay [C] L3301/L3901 (14) CCV Heater Fuse [D] L4701 (15) CCV SB Fuse (16) CCV Heater (OUT) (17) CCV Heater (IN) 9Y1211012ENS0115US0 1-S32 KiSC issued 09, 2016 A...
  • Page 196 Steering bearing flange bolt 2.4 to 2.8 kgf·m (L3301/L3901) 17.3 to 20.2 lbf·ft (1) Suction Hose (6) Rail Pressure Sensor (2) Steering Joint Shaft (L3301/L3901) (7) Supply Pump (3) Delivery Pipe (8) Camshaft Position Sensor (4) Fuel Pump (9) Crank Shaft Position Sensor...
  • Page 197 L3301, L3901, L4701, WSM ENGINE Propeller Shaft (L3301/L3901) 1. Remove the screw (4) then tap out the spring pin (3). 2. Slide the propeller shaft cover 1 (5) to the front and the cover 2 (6) to the rear. 3. Tap out the spring pins (1) and then slide the coupling (2) to the front and coupling (8) to the rear.
  • Page 198 L3301, L3901, L4701, WSM ENGINE Propeller Shaft (L4701) 1. Remove the bracket 1 (1). 2. Remove the bracket 2 (2). 3. Slide the propeller shaft cover 2 (8) to the front and the propeller shaft cover 1 (3) to the rear.

  • Page 199: Separating Engine From Front Axle Frame

    L3301, L3901, L4701, WSM ENGINE [3] SEPARATING ENGINE FROM FRONT AXLE FRAME Clutch Assembly 1. Insert the clutch center tool (1). 2. Remove the clutch assembly (2) together with the clutch center tool. (When reassembling) • Direct the shorter end of the clutch disc boss toward the flywheel.
  • Page 200 L3301, L3901, L4701, WSM ENGINE (Continued) [L3301, L3901] [L4701] (20) CCV Heater 1 (21) Separator (CCV) (22) CCV Heater 2 9Y1211012ENS0028US0 1-S37 KiSC issued 09, 2016 A...
  • Page 201 L3301, L3901, L4701, WSM ENGINE Front Axle Frame 1. Remove one of two engine hooks attached on the flywheel side of engine and install it on left side of the engine. 2. Hold the engine by using hoist and engine hooks (1).

  • Page 202: Disassembling And Assembling

    L3301, L3901, L4701, WSM ENGINE 6. DISASSEMBLING AND ASSEMBLING [1] OUTER PARTS Outer Parts 1. Remove starter motor (1). 2. Remove hydraulic pump (2) with pump holder and regulator valve (L4701 only). (1) Starter Motor (2) Hydraulic Pump 9Y1211012ENS0030US0 [2] EGR EGR Related Parts 1.

  • Page 203: Common Rail

    L3301, L3901, L4701, WSM ENGINE [3] COMMON RAIL Common Rail and Injection Pipes CAUTION • Do not loosen the injection pipe when the fuel is under high pressure (within 5 minutes of stopping the engine). NOTE • Do not remove the pressure limiter (5) and rail pressure sensor (2) from the common rail (4).
  • Page 204 L3301, L3901, L4701, WSM ENGINE Camshaft Position Sensor 1. Remove the camshaft position sensor mounting screw. 2. Remove the camshaft position sensor (1). (When reassembling) • Replace the O-ring with a new one. 0.2 to 1.3 mm Air Gap Factory specification 0.008 to 0.059 in.

  • Page 205: Cylinder Head And Valves

    L3301, L3901, L4701, WSM ENGINE [4] CYLINDER HEAD AND VALVES Cylinder Head Cover and Glow Plug 1. Remove the glow lead and the glow plugs (1). 2. Remove the cylinder head cover (2). (When reassembling) • Check to see that the cylinder head cover gasket is not damaged.
  • Page 206 L3301, L3901, L4701, WSM ENGINE Overflow Pipe and Injectors 1. Remove the overflow pipe (1). 2. Remove the injector clamp (2). 3. Remove the injector (3) and its gasket (4). IMPORTANT • Do not disassemble the injector (3). • Do not remove the injector ID code (6).
  • Page 207 L3301, L3901, L4701, WSM ENGINE Rocker Arm and Push Rods 1. Remove the screws of the rocker arm bracket. 2. Remove the rocker arm assembly (1). 3. Remove the push rods (2). (When reassembling) • When you put the push rods (2) on the tappets (3), make sure that their ends are correctly engaged with the grooves.
  • Page 208 L3301, L3901, L4701, WSM ENGINE Cylinder Head 1. Remove the cylinder head screw in the sequence of (n or r) to (a). 2. Lift up the cylinder head (3) to remove. 3. Remove the cylinder head gasket (4). (When reassembling) •...
  • Page 209 L3301, L3901, L4701, WSM ENGINE (Continued) IMPORTANT • After you replace an item below, you have to select a cylinder head gasket. – Piston – Piston pin – Small end bushing – Connecting rod – Crankpin bearings To select the cylinder head gasket 1.

  • Page 210: Thermostat

    L3301, L3901, L4701, WSM ENGINE Valves 1. Remove the valve caps (3). 2. Push the valve spring retainer with the valve spring replacer (1) and remove the valve spring collets (4). 3. Remove the valve spring retainer (5) and valve spring (6).

  • Page 211: Supply Pump

    L3301, L3901, L4701, WSM ENGINE [6] SUPPLY PUMP Supply Pump CAUTION • Do not loosen the injection pipe when the fuel is under high pressure (Within 5 minutes of stopping the engine). 1. Remove the intake throttle valve assembly (2).

  • Page 212: Water Pump And Oil Cooler

    L3301, L3901, L4701, WSM ENGINE [7] WATER PUMP AND OIL COOLER Water Pump 1. Remove the pipe band and the water pipe (water pump side). 2. Remove the water pump (1). (When reassembling) • When mounting the water pump, be careful not to forget mounting the O-ring and not to let it out of position.

  • Page 213: Gear Case And Timing Gear

    L3301, L3901, L4701, WSM ENGINE [8] GEAR CASE AND TIMING GEAR Fan Drive Pulley 1. Lock the flywheel with the flywheel stopper. 2. Remove the mounting nut (1) of the fan drive pulley with a 46 mm (1.8 in.) deep socket wrench (3).
  • Page 214 L3301, L3901, L4701, WSM ENGINE Idle Gear (D1803-CR-E4) 1. Remove the external snap ring. 2. Remove the idle gear collar. 3. Remove the idle gear (2). (When reassembling) • Align each gear with its mark. – Idle gear (2) and crank gear (4) –...
  • Page 215 L3301, L3901, L4701, WSM ENGINE Camshaft and Balancer Shaft (V2403-CR-E4) 1. Remove the camshaft set bolts and draw out the camshaft (1). 2. Remove the balancer shaft 1 (2) set bolts and draw out the balancer shaft 1 (2). 3. Remove the balancer shaft 2 (3) set bolts and draw out the balancer shaft 2 (3).

  • Page 216: Piston And Connecting Rod

    L3301, L3901, L4701, WSM ENGINE Crank Gear 1. Pull out the crank gear (2) with a puller (1). 2. Remove the feather key. (1) Puller (2) Crank Gear 9Y1211012ENS0058US0 [9] PISTON AND CONNECTING ROD Oil Pan and Oil Strainer 1. Remove the oil pan mounting screws and remove the oil pan (1).
  • Page 217 L3301, L3901, L4701, WSM ENGINE Pistons 1. Fully clean the carbon (1) in the cylinders. 2. Remove the connecting rod cap (3). 3. Turn the flywheel and move the piston to top dead center. 4. Lightly tap the piston from the bottom of the crankcase with the grip of a hammer to pull the piston out.
  • Page 218 L3301, L3901, L4701, WSM ENGINE Piston Ring and Connecting Rod 1. Remove the piston rings (1), (2) and (3) with a piston ring tool. 2. Remove the piston pin (8) to disconnect the connecting rod (6) from the piston (5).

  • Page 219: Flywheel And Crankshaft

    L3301, L3901, L4701, WSM ENGINE [10] FLYWHEEL AND CRANKSHAFT Flywheel 1. Attach the stopper to the flywheel (1). 2. Remove 2 flywheel screws (2). 3. Put the 2 flywheel guide screws (3) in the holes. 4. Remove all the flywheel screws (2).
  • Page 220 L3301, L3901, L4701, WSM ENGINE Measuring Angular Deviation between Crankshaft TDC and Crank Position Sensor Detected TDC IMPORTANT • Perform this correction every time the crank shaft or flywheel is replaced. 9Y1211012ENS0063US0 Confirmation of Top Dead Center 1. Remove the rocker arm (1). (See page 1-S45.) 2.
  • Page 221 L3301, L3901, L4701, WSM ENGINE Confirmation of Crank Position Sensor Top Dead Center Detection Position 1. Align the 20th pulsar hole (5) from the area where there is no pulsar hole (1) on the outer circumference of the flywheel (2) with the crank position sensor mounting hole (4) on the flywheel housing (3).
  • Page 222 L3301, L3901, L4701, WSM ENGINE Bearing Case Cover 1. Remove the mounting screws of the bearing case cover. First, remove inner screws (5) and then external screws (3). 2. Remove the bearing case cover (6). IMPORTANT • The length of inner screws (5) and external screws (3) are different.
  • Page 223 L3301, L3901, L4701, WSM ENGINE Crankshaft NOTE • Before you disassemble, measure the side clearance of crankshaft. Measure it when you assemble again. [D1803-CR-E4] 1. Remove the screw 2 (1) of the main bearing case. 2. Turn the crankshaft to set the crankpin of the third cylinder to the bottom dead center.
  • Page 224 L3301, L3901, L4701, WSM ENGINE Main Bearing Case Assembly 1. Remove the screws 1 of the main bearing case (7). Then remove the main bearing case. 2. Remove other main bearing cases as above. (When reassembling) • Clean the oil channel in the main bearing case.

  • Page 225: Servicing

    L3301, L3901, L4701, WSM ENGINE 7. SERVICING [1] CYLINDER HEAD AND VALVES Top Clearance 1. Remove the cylinder head. 2. With the piston at TDC, use grease to affix three or four plastigauges (1) of a diameter 1.5 mm (0.059 in.) × 5.0 to 7.0 mm (0.20 to 0.27 in.) long to the crown of the piston;...
  • Page 226 L3301, L3901, L4701, WSM ENGINE Cylinder Head Flaw 1. Prepare an air spray red check. 2. Clean the surface of the cylinder head with detergent (2). 3. Apply some red permeative liquid (1) on the cylinder head surface. After you apply, do not touch it for 5 to 10 minutes.
  • Page 227 L3301, L3901, L4701, WSM ENGINE Replacement of Valve Guide (When removing) 1. Press out the used valve guide with the valve guide replacing tool. (See page G-83.) (When installing) 1. Clean the new valve guide and valve guide bore, and apply engine oil to them.
  • Page 228 L3301, L3901, L4701, WSM ENGINE Correction of Valve and Valve Seat NOTE • Before you correct the valve and seat, check the valve stem and measure the I.D. of the valve guide section. Repair them if necessary. • After you correct the valve seat, be sure to check the valve recessing.
  • Page 229 L3301, L3901, L4701, WSM ENGINE Free Length and Tilt of Valve Spring 1. Measure the free length (B) of valve spring with a vernier calipers. 2. If the measurement is less than the allowable limit, replace it. 3. Put the valve spring on a surface plate, and put a square on the side of the valve spring.
  • Page 230 L3301, L3901, L4701, WSM ENGINE Push Rod Bend 1. Put the push rod on V blocks. 2. Set a dial indicator with its point on the middle of the push rod. 3. Turn the push rod slowly and read the variation on the indicator.

  • Page 231: Timing Gears

    L3301, L3901, L4701, WSM ENGINE [2] TIMING GEARS Timing Gear Backlash 1. Set a dial indicator (lever type) with its point on the gear tooth. 2. Hold the mating gear and move the gear to measure the backlash. 3. If the backlash is more than the allowable limit, measure the oil clearance in the journal part of each shaft.
  • Page 232 L3301, L3901, L4701, WSM ENGINE Side Clearance of Camshaft 1. Set a dial indicator with its point on the camshaft. 2. Move the cam gear to the front and rear to measure the side clearance. 3. If the measurement is more than the allowable limit, replace the camshaft stopper.
  • Page 233 L3301, L3901, L4701, WSM ENGINE Oil Clearance of Balancer Shaft Journal (V2403-CR-E4) 1. Measure the balancer shaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. for balancer shaft with an inside micrometer or cylinder gauge.

  • Page 234: Piston And Connecting Rod

    L3301, L3901, L4701, WSM ENGINE Replacement of Idle Gear Bushing (When removing) 1. Press out the used idle gear bushing with the replacing tool. (See page G-83.) (When installing) 1. Clean a new idle gear bushing and idle gear bore, and apply engine oil to them.
  • Page 235 L3301, L3901, L4701, WSM ENGINE Connecting Rod Alignment NOTE • Make sure that the oil clearance of the small end bushing is less than the allowable limit. 1. Install the piston pin into the connecting rod. 2. Install the connecting rod on the alignment tool of the connecting rod.

  • Page 236: Crankshaft

    L3301, L3901, L4701, WSM ENGINE Clearance between Piston Ring and Groove 1. Clean the rings and the ring grooves, and install each ring in its groove. 2. Measure the clearance between the ring and the groove with a feeler gauge or depth gauge.
  • Page 237 L3301, L3901, L4701, WSM ENGINE Crankshaft Bend 1. Hold the 2 end journals of crankshaft with V blocks on the surface plate. 2. Set a dial indicator with its point on the middle journal. 3. Turn the crankshaft slowly and read the variation on the indicator.
  • Page 238 L3301, L3901, L4701, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 1. Measure the O.D. of the crankshaft journal with an external micrometer. 2. Measure the I.D. of the crankshaft bearing 1 with an internal micrometer. 3. Calculate the oil clearance.
  • Page 239 L3301, L3901, L4701, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 1. Put a strip of plastigauge on the center of the journal. 2. Install the bearing case and tighten the baring case screws 1 to the specified torque, and remove the bearing case again.
  • Page 240 L3301, L3901, L4701, WSM ENGINE Replacement of Crankshaft Sleeve 1. Remove the used crankshaft sleeve (3). 2. Set the sleeve guide (2) to the crankshaft (5). 3. Set the stopper (1) to the crankshaft (5) (see the figure). 4. Increase the temperature of a new sleeve to between 150 and 200 °C (302 and 392 °F).

  • Page 241: Cylinder

    L3301, L3901, L4701, WSM ENGINE [5] CYLINDER Cylinder Wear 1. Measure the I.D. of the cylinder at the 6 positions (see figure) with a cylinder gauge. 2. Find the maximum and minimum inner diameters. 3. Find the difference between the maximum and the minimum inner diameters.

  • Page 242: Oil Pump

    L3301, L3901, L4701, WSM ENGINE [6] OIL PUMP Rotor Lobe Clearance 1. Measure the clearance between the lobes of the inner rotor and the outer rotor with a feeler gauge. 2. Measure the clearance between the outer rotor and the pump body with a feeler gauge.
  • Page 243 CLUTCH KiSC issued 09, 2016 A...
  • Page 244 MECHANISM CONTENTS 1. FEATURE ........................... 2-M1 [1] TRAVELING CLUTCH......................2-M1 (1) Manual Transmission Model................... 2-M1 (2) Hydrostatic Transmission (HST) Model................2-M2 KiSC issued 09, 2016 A...

  • Page 245: Feature

    [1] TRAVELING CLUTCH (1) Manual Transmission Model Single Stage Clutch (L3301, L4701) Manual Transmission Model (L3301, L4701) are equipped with the single stage clutch. The clutch is located between the engine and the transmission and is operated by stepping on the clutch pedal.
  • Page 246 CLUTCH (2) Hydrostatic Transmission (HST) Model Single Stage Clutch (L3301, L3901) HST models (L3301, L3901) are equipped with the single stage clutch. The clutch is located between the engine and the transmission and is operated by stepping on the clutch pedal.
  • Page 247 1. TROUBLESHOOTING.........................2-S1 2. SERVICING SPECIFICATIONS ....................2-S3 3. TIGHTENING TORQUES......................2-S4 4. CHECKING AND ADJUSTING....................2-S5 5. DISASSEMBLING AND ASSEMBLING ..................2-S6 [1] L3301/L3901..........................2-S6 (1) Separating Engine and Clutch Housing................2-S6 (2) Separating Clutch Assembly ..................2-S13 [2] L4701...........................2-S14 (1) Separating Engine and Clutch Housing.................2-S14 (2) Separating Clutch Assembly ..................2-S21 6.

  • Page 248: Troubleshooting

    L3301, L3901, L4701, WSM CLUTCH 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Clutch Drags Clutch pedal free travel excessive Adjust 2-S5 Clutch disc boss spline sticking or rusted Replace or remove 2-S21 dust Dust on clutch disc generated from clutch disc Remove rust –...
  • Page 249 L3301, L3901, L4701, WSM CLUTCH Reference Symptom Probable Cause Solution Page Vibration Main shaft bent Replace 3-S39, 3-S48, 3-S74, 3-S86 Clutch disc rivet worn or broken Replace 2-S21, 2-S22 Clutch parts broken Replace – 9Y1211012CLS0001US0 2-S2 KiSC issued 09, 2016 A...

  • Page 250: Servicing Specifications

    L3301, L3901, L4701, WSM CLUTCH 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Clutch Pedal Free Travel 20 to 30 mm – 0.8 to 1.2 in. Pressure Plate to Adjusting Bolt Clearance 0.9 to 1.0 mm – 0.035 to 0.039 in.

  • Page 251: Tightening Torques

    L3301, L3901, L4701, WSM CLUTCH 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) Item N·m kgf·m lbf·ft...

  • Page 252: Checking And Adjusting

    L3301, L3901, L4701, WSM CLUTCH 4. CHECKING AND ADJUSTING Adjusting Clutch Pedal (Single Clutch) 1. Stop the engine and remove the key. 2. Slightly depress the clutch pedal and measure free travel at the top of pedal stroke. 3. If measurement is needed, loosen the lock nut (1) and turn the clutch rod (2) or turnbuckle (3) to adjust the rod length within acceptable limits.

  • Page 253: Disassembling And Assembling

    L3301, L3901, L4701, WSM CLUTCH 5. DISASSEMBLING AND ASSEMBLING [1] L3301/L3901 (1) Separating Engine and Clutch Housing Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 254 L3301, L3901, L4701, WSM CLUTCH Battery Negative Cable Connector 1. Open bonnet. 2. Disconnect battery negative cable connector (1). (1) Battery Negative Cable Connector 9Y1211012RAS0005US0 Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS"...
  • Page 255 L3301, L3901, L4701, WSM CLUTCH Steering Wheel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller. 2. Remove the throttle grip (4). 3. Disconnect the main switch (5). 4. Disconnect the combination switch (6). 5. Disconnect the DPF switches (2).
  • Page 256 L3301, L3901, L4701, WSM CLUTCH Step and Center Cover (L3301/L3901) 1. Remove the center cover (4). 2. Disconnect the throttle cable from the throttle pedal (2). 3. Remove the HST pedal (7). 4. Disconnect the differential lock spring and rod from the differential lock lever (3).
  • Page 257 L3301, L3901, L4701, WSM CLUTCH Hydraulic Pipes and Electrical Wiring (Under Fuel Tank Base and Left Side) 1. Disconnect the connectors of injector (5). 2. Disconnect the glow plug (4). 3. Disconnect the EGR valve (3). 4. Disconnect the air flow sensor (2).
  • Page 258 Steering bearing flange bolt 2.4 to 2.8 kgf·m (L3301/L3901) 17.3 to 20.2 lbf·ft (1) Suction Hose (6) Rail Pressure Sensor (2) Steering Joint Shaft (L3301/L3901) (7) Supply Pump (3) Delivery Pipe (8) Camshaft Position Sensor (4) Fuel Pump (9) Crank Shaft Position Sensor...
  • Page 259 L3301, L3901, L4701, WSM CLUTCH Propeller Shaft (L3301/L3901) 1. Remove the screw (4) then tap out the spring pin (3). 2. Slide the propeller shaft cover 1 (5) to the front and the cover 2 (6) to the rear. 3. Tap out the spring pins (1) and then slide the coupling (2) to the front and coupling (8) to the rear.

  • Page 260: Separating Clutch Assembly

    L3301, L3901, L4701, WSM CLUTCH (2) Separating Clutch Assembly Clutch Assembly 1. Insert the clutch center tool (1). 2. Remove the clutch assembly (2) together with the clutch center tool. (When reassembling) • Direct the shorter end of the clutch disc boss toward the flywheel.

  • Page 261: L4701

    L3301, L3901, L4701, WSM CLUTCH [2] L4701 (1) Separating Engine and Clutch Housing Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 262 L3301, L3901, L4701, WSM CLUTCH Bonnet and Side Covers 1. Disconnect the headlight connector (1). 2. Remove the damper (2) from the bonnet. 3. Disconnect the bolt (3) from the bonnet. 4. Remove the bonnet (4). 5. Remove the R.H. and L.H. side covers (5).
  • Page 263 L3301, L3901, L4701, WSM CLUTCH Fuel Tank and Base 1. Disconnect the fuel sensor (4). 2. Disconnect the fuel return line (1). 3. Remove the fuel tank band (2). 4. Remove the fuel tank (3). 5. Disconnect the connector and hoses from the differential pressure sensor (6).
  • Page 264 L3301, L3901, L4701, WSM CLUTCH Hydraulic Pipes and Electrical Wiring (Under Fuel Tank Base and Left Side) 1. Disconnect the injector connectors (5). 2. Disconnect the glow plug (4). 3. Disconnect the EGR valve (3) connector. 4. Disconnect the air flow sensor (2) connector.
  • Page 265 L3301, L3901, L4701, WSM CLUTCH Hydraulic Pipes and Electrical Wiring (Right Side) 1. Remove the suction hose (1). 2. Remove the delivery pipe (4). 3. Remove the EGR valve (2) connector. 4. Disconnect the crank position sensor (7). 5. Disconnect the fuel pump (8).
  • Page 266 L3301, L3901, L4701, WSM CLUTCH Power Steering Controller Hoses 1. Since identification tapes are not installed to the hoses, mark the hoses as shown in the picture. 2. After marking, disconnect the left delivery hose (3) and the right delivery hose (1).
  • Page 267 L3301, L3901, L4701, WSM CLUTCH Propeller Shaft (L4701) 1. Remove the bracket 1 (1). 2. Remove the bracket 2 (2). 3. Slide the propeller shaft cover 2 (8) to the front and the propeller shaft cover 1 (3) to the rear.

  • Page 268: Separating Clutch Assembly

    L3301, L3901, L4701, WSM CLUTCH (2) Separating Clutch Assembly Clutch Assembly 1. Insert the clutch center tool. 2. Remove the clutch assembly together with the clutch center tool. (When reassembling) • Direct the shorter end of the clutch disc boss toward the flywheel.

  • Page 269: Servicing

    L3301, L3901, L4701, WSM CLUTCH 6. SERVICING [1] SINGLE STAGE CLUTCH Backlash between Clutch Disc Boss and Shaft 1. Mount the clutch disc to the main shaft. 2. Hold the main shaft so that it does not turn. 3. Rotate disc lightly and measure the displacement around the disc edge.
  • Page 270 L3301, L3901, L4701, WSM CLUTCH Pressure Plate Flatness 1. Place a straightedge on the pressure plate and measure clearance with a feeler gauge at several points. 2. If the clearance exceeds the allowable limit, replace it. 3. When the pressure plate is worn around its outside and its inside surface only is in contact with the straightedge, replace even if the clearance is within allowable limit.

  • Page 271: Dual Stage Clutch

    L3301, L3901, L4701, WSM CLUTCH [2] DUAL STAGE CLUTCH Backlash between Clutch Disc Boss and Shaft 1. Mount the PTO clutch disc to the 16T gear shaft. 2. Hold the gear 16T gear shaft so that it does not turn.
  • Page 272 L3301, L3901, L4701, WSM CLUTCH Release Lever Height 1. Mount the dual stage clutch exclusive tool (Code No. 07916-90052). 2. Measure the clearance between gauge ring and the top of adjusting screw with a feeler gauge. 3. If the clearance is not within the factory specifications, adjust with the adjusting screws.
  • Page 273 TRANSMISSION KiSC issued 09, 2016 A...
  • Page 274 (4) Front Wheel Drive Section (4WD Model Only) ............... 3-M9 [2] PTO SYSTEM ........................3-M10 (1) Structure ........................3-M10 (2) Shift Linkage (L3301/L3901) ..................3-M12 (3) System of PTO Clutch (L4701)..................3-M12 3. HYDROSTATIC TRANSMISSION (HST) MODEL ..............3-M15 [1] Hydrostatic Transmission Assembly................... 3-M15 (1) Structure ........................

  • Page 275: Structure

    L3301, L3901, L4701, WSM TRANSMISSION 1. STRUCTURE [1] MANUAL TRANSMISSION MODEL (1) L3301 (1) Main Gear Shift Section (2) Synchro-shuttle Gear Shift Section (3) Range Gear Shift Section (4) PTO Clutch Section (5) Front Wheel Drive Section (4WD Model Only)
  • Page 276 L3301, L3901, L4701, WSM TRANSMISSION (2) L3901 (1) Main Gear Shift Section (2) Synchro-shuttle Gear Shift Section (3) Range Gear Shift Section (4) PTO Gear Shift Section (5) Front Wheel Drive Section (4WD Model Only) 2WD Model 3-M2 KiSC issued 09, 2016 A...
  • Page 277 L3301, L3901, L4701, WSM TRANSMISSION (3) L4701 (1) Main Gear Shift Section (2) Synchro-shuttle Gear Shift Section (3) Lo Range Gear Shift Section (4) PTO Clutch Section (5) Front Wheel Drive Section (4WD Model Only) 2WD Model 3-M3 KiSC issued 09, 2016 A...
  • Page 278 L3301, L3901, L4701, WSM TRANSMISSION [2] HYDROSTATIC TRANSMISSION (HST) MODEL (1) L3301/L3901 (1) Hydrostatic Transmission Section (2) Range Gear Shift Section (3) PTO Clutch Section (4) Front Wheel Drive Section 3-M4 KiSC issued 09, 2016 A...
  • Page 279 L3301, L3901, L4701, WSM TRANSMISSION (2) L4701 (1) Hydrostatic Transmission Section (2) Range Gear Shift Section (3) PTO Clutch Section (4) Front Wheel Drive Section 3-M5 KiSC issued 09, 2016 A...

  • Page 280: Manual Transmission Model

    L3301, L3901, L4701, WSM TRANSMISSION 2. MANUAL TRANSMISSION MODEL [1] POWER TRAIN FOR TRAVELING GEARS (1) Main Gear Shift Section L3301/L3901 Besides neutral, four ways of power train from the main gear shaft (11) to the counter shaft (1) are available by operating the 1, 2, 3, 4 range gear shift lever.

  • Page 281: Synchro-Shuttle Section

    L3301, L3901, L4701, WSM TRANSMISSION (2) Synchro-Shuttle Section L3301/L3901 Besides neutral, forward and reverse of power train from counter shaft (1) are available by operating the synchro-shuttle lever. Power is transmitted as follows. F: Forward Counter Shaft (1) → 23T Gear (2) → 22T Gear (11) →...

  • Page 282: Range Gear Shift Section

    L3301, L3901, L4701, WSM TRANSMISSION (3) Range Gear Shift Section L3301/L3901 Two ways of power train from the shuttle gear shaft (1) to the spiral bevel pinion shaft (8) are available by operating the range gear shift lever. Power is transmitted as follows.

  • Page 283: Front Wheel Drive Section (4Wd Model Only)

    L3301, L3901, L4701, WSM TRANSMISSION (4) Front Wheel Drive Section (4WD Model Only) L3301/L3901 2-wheel drive or 4-wheel drive is selected by operating the front wheel drive lever to shift the 33T shift gear (5). When the front wheel drive lever is set to disengage, 33T shift gear (5) is neutral.

  • Page 284: Pto System

    L3301, L3901, L4701, WSM TRANSMISSION [2] PTO SYSTEM (1) Structure L3301 (1) Main Gear Shaft (3) PTO Counter Shaft (5) PTO Clutch (7) PTO Shaft (2) 45T Gear (4) PTO Clutch Shifter (6) PTO Drive Shaft PTO is "ENGAGED" or "DISENGAGED" by operating the shift lever of the PTO shifter.
  • Page 285 L3301, L3901, L4701, WSM TRANSMISSION L4701 (1) PTO Gear Shaft 1 (4) Accumulator (6) PTO Gear Shaft (7) PTO Drive Shaft (2) PTO Gear Shaft 2 (5) PTO Clutch Valve (PTO Clutch Shaft) (8) Rear PTO Shaft (3) PTO Clutch Pack The independent PTO operated by PTO clutch pack (3) is adopted to L4701.

  • Page 286: Shift Linkage (L3301/L3901)

    L3301, L3901, L4701, WSM TRANSMISSION (2) Shift Linkage (L3301/L3901) (1) PTO Shift Lever (2) PTO Shift Range Arm (3) PTO Fork Rod (4) PTO Shift Fork Disengaged Engaged The PTO shift lever (1) to the PTO shift fork (4) are connected by the PTO shift range arm (2) as shown in the figure above.
  • Page 287 L3301, L3901, L4701, WSM TRANSMISSION  PTO Clutch Control Switch "OFF" Position When the PTO control switch is set at "OFF" position, the coil is not a magnetic. The spring pushes the rod and the ball (12) is pushed by the plunger (11).
  • Page 288 L3301, L3901, L4701, WSM TRANSMISSION  PTO Clutch Control Switch "ON" Position When the PTO control switch is set at "ON" position the coil (16) of the solenoid valve (3) is excited. The rod (14) is pulled in to the solenoid valve (3) by the excited coil (16).

  • Page 289: Hydrostatic Transmission (Hst) Model

    L3301, L3901, L4701, WSM TRANSMISSION 3. HYDROSTATIC TRANSMISSION (HST) MODEL [1] Hydrostatic Transmission Assembly (1) Structure [A] L3301/L3901 The HST of this tractor is a built-in type to the clutch housing. HST assembly chiefly consists of HST case (clutch housing case), variable displacement piston pump, fixed displacement piston motor, charge pump and various valves.
  • Page 290 L3301, L3901, L4701, WSM TRANSMISSION (1) Input Shaft (5) Piston (Pump) (9) Cylinder Block (Motor) (12) Check and High Pressure (2) Pump Shaft (6) Cylinder Block (Pump) (10) Fixed Swashplate Relief Valve (3) 27T Gear (7) Case Relief Valve (11) 28T Gear...
  • Page 291 L3301, L3901, L4701, WSM TRANSMISSION [B] L4701 (1) 23T Input Gear Shaft (2) HST Case (Clutch Housing) (3) Check and High Pressure Relief Valve (4) Check Port (for High Pressure Relief Valve) (5) Check Port (for High Pressure Relief Valve)
  • Page 292 L3301, L3901, L4701, WSM TRANSMISSION (1) Fixed Swashplate (7) Regulator Assembly (13) HST Case Sectional View X-X' (2) Variable Swashplate (8) Port Block Cover (14) Case Relief Valve Sectional View Z-Z' (3) Pump Shaft (9) Charge Pump (15) Charge Relief Valve...

  • Page 293: Oil Flow

    L3301, L3901, L4701, WSM TRANSMISSION (2) Oil Flow L3301/L3901 (1) Pump Shaft (5) Fixed Displacement Motor (9) Oil Cooler To Hydraulic Block (2) Variable Displacement Pump (6) Output Shaft (Motor Shaft) (10) Hydraulic Pump (Main Circuit) To Power Steering (3) Check and High Pressure...
  • Page 294 L3301, L3901, L4701, WSM TRANSMISSION L4701 (1) Transmission Case (9) Charge Pump (15) HST Pedal To Power Steering (2) Hydraulic Filter (10) Check and High Pressure (16) PTO Clutch Pressure Priority Controller (3) Hydraulic Pump Relief Valve Valve To PTO Clutch Valve...

  • Page 295: Operation

    L3301, L3901, L4701, WSM TRANSMISSION (3) Operation [A] L3301/L3901 When the HST pedal is in the neutral position (1) Oil Cooler (7) Charge Relief Valve (10) Case Relief Valve (14) Hydraulic Pump (2) Oil Filter (HST) (8) Check and High Pressure...
  • Page 296 L3301, L3901, L4701, WSM TRANSMISSION When the HST pedal is pressed toward the forward side (1) Oil Cooler (8) Check and High Pressure (13) Hydraulic Control Valve Pump Port A (2) Oil Filter (HST) Relief Valve (Forward) (14) Hydraulic Pump...
  • Page 297 L3301, L3901, L4701, WSM TRANSMISSION When the HST pedal is pressed toward the reverse side (1) Oil Cooler (8) Check and High Pressure (13) Hydraulic Control Valve Pump Port A (2) Oil Filter (HST) Relief Valve (Forward) (14) Hydraulic Pump...
  • Page 298 L3301, L3901, L4701, WSM TRANSMISSION [B] L4701 Servomechanism (1) Control Lever (5) Control Shaft (9) Orifice Slit for Connection of (Connected to HST Pedal) (6) Servo Piston (10) Pin A Swashplate (2) Regulator Valve Assembly (7) Spring (Fixed with Control Shaft)
  • Page 299 L3301, L3901, L4701, WSM TRANSMISSION Neutral (1) Transmission Case (9) Regulator Valve Assembly (16) Case Relief Valve (23) Check and High Pressure (2) Filter (10) HST Pedal (17) Charge Pump Relief Valve (3) Input Shaft (11) Spool (18) Charge Relief Valve...
  • Page 300 L3301, L3901, L4701, WSM TRANSMISSION Forward (1) Transmission Case (10) HST Pedal (19) Oil Filter Pump Port A (2) Filter (11) Spool (20) PTO Clutch Valve Circuit Pump Port B (3) Input Shaft (12) Bypass Pipe (21) Motor Cylinder Block...
  • Page 301 L3301, L3901, L4701, WSM TRANSMISSION Reverse (1) Transmission Case (10) HST Pedal (19) Oil Filter Pump Port (2) Filter (11) Spool (20) PTO Clutch Valve Circuit AB: Pump Port (3) Input Shaft (12) Bypass Pipe (21) Motor Cylinder Block BC: Motor Port...

  • Page 302: Power Train For Traveling Gears

    L3301, L3901, L4701, WSM TRANSMISSION [2] POWER TRAIN FOR TRAVELING GEARS (1) Range Gear Shift Section L3301/L3901 The range gear shift section is located in the mid case. It changes the speed to five position (L, N, M, N and H) by shifting of shift gear (3) in the straight line on shaft (2).

  • Page 303: Front Wheel Drive Section

    L3301, L3901, L4701, WSM TRANSMISSION (2) Front Wheel Drive Section L3301/L3901 Front wheel drive section is located in the differential gear case. 2 wheel drive or 4 wheel drive is selected by operating the front wheel drive lever to shift the shift gear (2).

  • Page 304: Linkage Mechanism

    L3301, L3901, L4701, WSM TRANSMISSION [3] LINKAGE MECHANISM (1) HST PEDAL CONTROL LINKAGE L3301/L3901 (1) HST Pedal (3) Spring (5) Neutral Rod (7) Pedal Bracket (2) Neutral Holder Arm (4) Neutral Holder (6) Damper (8) Ball Bearing The speed control pedal (HST pedal) (1) and the holder (Trunnion) are linked with the pedal bracket and HST neutral rod (5).
  • Page 305 L3301, L3901, L4701, WSM TRANSMISSION L4701 (1) HST Assembly (4) HST Control Rod (7) Neutral Rod (10) Neutral Holder Arm (2) Regulator Valve Assembly (5) HST Pedal (8) Neutral Holder (11) Damper (3) HST Control Lever (6) Connecting Shaft (9) Ball Bearing...

  • Page 306: Cruise Control

    L3301, L3901, L4701, WSM TRANSMISSION (2) Cruise Control L3301/L3901 (Option) (1) Connecting Shaft (4) Cruise Lever 1 (6) Cruise Lever 2 (8) Lever Rod (2) Cruise Adjusting Rod (5) Release Lever (7) Cruise Control Lever (9) Release Spring (3) Release Wire The cruise control lever (7) and HST pedal are linked with the lever rod (8), cruise lever 1 (4), cruise lever 2 (6), cruise adjusting rod (2) and connecting shaft (1).
  • Page 307 L3301, L3901, L4701, WSM TRANSMISSION L4701  Speed Set (1) HST Pedal (4) Release Lever (7) Cruise Control Lever (10) Cruise Lever 1 (2) Connecting Shaft (5) Friction Plate (8) Lever Rod (11) Cruise Adjusting Rod (3) Cruise Spring (6) Friction Disk...

  • Page 308: Pto System

    L3301, L3901, L4701, WSM TRANSMISSION [4] PTO SYSTEM (1) Structure L3301/L3901 (1) Pump Shaft (HST) (3) PTO Clutch (5) 15T-44T Gear (7) PTO Drive Shaft (2) PTO Counter Shaft (4) 16T Gear Shaft (6) 27T Gear (8) PTO Shaft PTO is "ENGAGED" or "DISENGAGED" by operating the shift lever of the PTO clutch (3).

  • Page 309: Mechanism

    L3301, L3901, L4701, WSM TRANSMISSION (2) Mechanism [A] L3301/L3901 Shift Linkage (1) PTO Lever (3) PTO Shift Fork (5) Lever Disengaged (2) PTO Shift Cable (4) 16T PTO Clutch Engaged The PTO lever (1) through the shift fork (3) are connected by shift cable (2), as shown in the figure above.
  • Page 310 L3301, L3901, L4701, WSM TRANSMISSION [B] L4701 Oil Flow The pressured oil from the charge pump (2) located in the HST assembly (3) flows into the PTO clutch valve (4). When the PTO clutch control switch is at the "ON"...
  • Page 311 L3301, L3901, L4701, WSM TRANSMISSION  PTO Clutch Control Switch "ON" Position When the PTO control switch is set at "ON" position the coil of the PTO solenoid valve (3) is excited. The spring (15) under the ball (2) is pushed into the solenoid valve (3).
  • Page 312 SERVICING CONTENTS 1. TROUBLESHOOTING.........................3-S1 2. SERVICING SPECIFICATIONS ....................3-S6 [1] L3301/L3901..........................3-S6 [2] L4701.............................3-S8 3. TIGHTENING TORQUES......................3-S10 [1] L3301/L3901........................3-S10 [2] L4701...........................3-S11 4. CHECKING AND ADJUSTING....................3-S13 [1] L3301/L3901........................3-S13 (1) MANUAL TRANSMISSION MODEL ................3-S13 (2) HST Model........................3-S14 [2] L4701...........................3-S18 (1) MANUAL TRANSMISSION MODEL ................3-S18 (2) HST Model........................3-S20...

  • Page 313: Troubleshooting

    L3301, L3901, L4701, WSM TRANSMISSION 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive Transmission fluid insufficient Fill G-37, G-65 Transmission Noise Gear worn or backlash improper Replace 3-S100, 3-S104, 3-S108, 3-S113 Bearing worn or broken Replace 3-S104, 3-S108, 3-S113...
  • Page 314 L3301, L3901, L4701, WSM TRANSMISSION Reference Symptom Probable Cause Solution Page Hard Shifting Shifter or shift fork worn or damaged Replace 3-S100, 3-S104, 3-S108, 3-S114 Shift fork bent Replace 3-S100, 3-S104, 3-S108, 3-S114 Shift linkage rusted Repair – Shaft part of shift arms rusted Repair –...
  • Page 315 L3301, L3901, L4701, WSM TRANSMISSION Reference Symptom Probable Cause Solution Page System Will Not Oil level is low Check oil level or fill G-37, G-65 Operate in Either oil to propeller level Direction Speed control pedal linkage damaged Repair or linkage...
  • Page 316 L3301, L3901, L4701, WSM TRANSMISSION Reference Symptom Probable Cause Solution Page Loss of Power Oil level is low Check oil level or fill G-37, G-65 oil to proper level Speed control pedal linkage damaged Repair linkage 3-S16, 3-S23 Charge pressure is too low...
  • Page 317 L3301, L3901, L4701, WSM TRANSMISSION PTO CLUTCH Reference Symptom Probable Cause Solution Page PTO Clutch Slips Operating pressure is low Adjust 3-S19, 3-S20 PTO clutch valve malfunctioning Repair or replace 3-S78 Clutch disc or drive plate excessively worn Replace 3-S80...

  • Page 318: Servicing Specifications

    L3301, L3901, L4701, WSM TRANSMISSION 2. SERVICING SPECIFICATIONS [1] L3301/L3901 Item Factory Specification Allowable Limit Gear Backlash 0.1 to 0.3 mm 0.4 mm 0.0040 to 0.011 in. 0.02 in. Gear to Spline Clearance 0.030 to 0.078 mm 0.20 mm 0.0012 to 0.0030 in.
  • Page 319 L3301, L3901, L4701, WSM TRANSMISSION Item Factory Specification Allowable Limit Check and High Pressure Relief Valve Setting Pressure 33.4 to 36.2 MPa – Condition 340 to 370 kgf/cm • Engine Speed: 4840 to 5260 psi Maximum • Oil Temperature 45 to 55 °C (113 to 131 °F) •...

  • Page 320: L4701

    L3301, L3901, L4701, WSM TRANSMISSION [2] L4701 Item Factory Specification Allowable Limit Gear Backlash 0.1 to 0.3 mm 0.4 mm 0.004 to 0.012 in. 0.02 in. Gear to Spline Clearance 0.030 to 0.078 mm 0.2 mm 0.0012 to 0.0030 in.
  • Page 321 L3301, L3901, L4701, WSM TRANSMISSION Item Factory Specification Allowable Limit High Pressure Relief Valve Setting Pressure 33.4 to 36.3 MPa – Condition 340.0 to 370.0 kgf/cm • Oil Temperature 4836 to 5263 psi 40 to 60 °C (104 to 140 °F) –...

  • Page 322: Tightening Torques

    L3301, L3901, L4701, WSM TRANSMISSION 3. TIGHTENING TORQUES [1] L3301/L3901 Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) Item N·m...
  • Page 323 L3301, L3901, L4701, WSM TRANSMISSION [2] L4701 Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: "5. TIGHTENING TORQUES" on page G-13.) Item N·m kgf·m lbf·ft HST control lever setting hex. head screw 6.9 to 8.3...
  • Page 324 L3301, L3901, L4701, WSM TRANSMISSION Item N·m kgf·m lbf·ft Cradle bearing bracket mounting hex. head screw 61 to 71 6.2 to 7.2 44.8 to 52.1 Check and high pressure relief valve hex. head plug 59 to 78 6.0 to 8.0 43.4 to 57.9...

  • Page 325: Checking And Adjusting

    L3301, L3901, L4701, WSM TRANSMISSION 4. CHECKING AND ADJUSTING [1] L3301/L3901 (1) MANUAL TRANSMISSION MODEL Checking Shuttle Shift Lever Neutral Position 1. Check if the shuttle shift lever (1) is in position "A" when lever is released at position "N".

  • Page 326: Hst Model

    L3301, L3901, L4701, WSM TRANSMISSION (2) HST Model Checking High Pressure Relief Valve Pressure CAUTION • When checking, park the machine on flat ground, apply the parking brake. 1. Remove the hex. socket head plug from P1 or P2 port. (P2 is for forward and P1 is for reverse.)
  • Page 327 L3301, L3901, L4701, WSM TRANSMISSION Checking Charge Relief Pressure CAUTION • When parking, park the machine on flat ground, apply the parking brake. 1. Remove the brake rod and the propeller shaft. (See page 1-S34.) 2. Remove the hex. socket head plug from P port (1).
  • Page 328 L3301, L3901, L4701, WSM TRANSMISSION Adjusting Neutral 1. Disengage the front wheel drive lever. (Drive only rear wheels.) 2. Set the cruise control to "OFF" position. (HST pedal is neutral position.) 3. Check to see that the length (A) of HST neutral rod (5) is specified length.
  • Page 329 L3301, L3901, L4701, WSM TRANSMISSION Adjusting PTO Wire 1. Check to see that the threaded portion of PTO wire(3) rear side is set at center position. If not, set by lock nuts (2). 2. Set the PTO lever (1) at the "OFF" position "A".

  • Page 330: L4701

    L3301, L3901, L4701, WSM TRANSMISSION [2] L4701 (1) MANUAL TRANSMISSION MODEL Checking Shuttle Shift Lever Neutral Position 1. Check if the shuttle shift lever (1) is in position "A" when lever is released at position "N". 2. If the lever is not in position "A", adjust shuttle shift lever position with the turnbuckle (2).
  • Page 331 L3301, L3901, L4701, WSM TRANSMISSION PTO Clutch Oil Operating Pressure 1. Remove the plug (2) from the PTO clutch solenoid valve (1). 2. Install the adaptor (3) to the PTO clutch solenoid valve (1). 3. Install the hydraulic cable and the gauge to the adaptor (3).

  • Page 332: Hst Model

    L3301, L3901, L4701, WSM TRANSMISSION (2) HST Model PTO Clutch Oil Operating Pressure 1. Remove the plug (2) from the PTO clutch solenoid valve. 2. Install the adaptor (3) to the PTO clutch solenoid valve. 3. Install the hydraulic cable and the gauge to the adaptor (3).
  • Page 333 L3301, L3901, L4701, WSM TRANSMISSION Checking High Pressure Relief Valve Pressure CAUTION • When checking, park the machine on flat ground, apply the parking brake. 1. Remove the hex. socket head plug from P1 or P2 port. (P2 is for forward and P1 is for reverse.)
  • Page 334 L3301, L3901, L4701, WSM TRANSMISSION Checking Charge Relief Pressure CAUTION • When checking, park the machine on flat ground, apply the parking brake. NOTE • Use a new transmission oil filter. 1. Remove the hex. socket head plug from P2 (or P1) port.
  • Page 335 L3301, L3901, L4701, WSM TRANSMISSION Adjusting Neutral CAUTION • Stop the engine when adjusting the HST neutral. 1. Set the cruise control lever to "OFF" position. (HST pedal is in Neutral position.) 2. Check to see that the length a of HST control rod (2) and the length b of neutral rod (6) are specified length.
  • Page 336 L3301, L3901, L4701, WSM TRANSMISSION Cruise Lever Operating Force 1. Push the cruise control lever (1) into maximum tied position. After that pull it 50 mm (2 in.) back. 2. Measure the force needed to move the cruise control lever back into the maximum position at middle of the lever grip (2).
  • Page 337 L3301, L3901, L4701, WSM TRANSMISSION Cruise Control Linkage and Maximum Travel Speed CAUTION • Stop the engine when adjusting the cruise control linkage and pedal stroke. NOTE • Be sure to adjust the HST neutral position. • Be sure to check whether the "traveling speed coefficient"...

  • Page 338: Disassembling And Assembling

    L3301, L3901, L4701, WSM TRANSMISSION 5. DISASSEMBLING AND ASSEMBLING [1] L3301/L3901 (1) Preparation [A] Separating Engine and Clutch Housing Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge.
  • Page 339 L3301, L3901, L4701, WSM TRANSMISSION Battery Negative Cable Connector 1. Open bonnet. 2. Disconnect battery negative cable connector (1). (1) Battery Negative Cable Connector 9Y1211012RAS0005US0 Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS"...
  • Page 340 L3301, L3901, L4701, WSM TRANSMISSION Steering Wheel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller. 2. Remove the throttle grip (4). 3. Disconnect the main switch (5). 4. Disconnect the combination switch (6). 5. Disconnect the DPF switches (2).
  • Page 341 L3301, L3901, L4701, WSM TRANSMISSION Step and Center Cover (L3301/L3901) 1. Remove the center cover (4). 2. Disconnect the throttle cable from the throttle pedal (2). 3. Remove the HST pedal (7). 4. Disconnect the differential lock spring and rod from the differential lock lever (3).
  • Page 342 L3301, L3901, L4701, WSM TRANSMISSION Hydraulic Pipes and Electrical Wiring (Under Fuel Tank Base and Left Side) 1. Disconnect the connectors of injector (5). 2. Disconnect the glow plug (4). 3. Disconnect the EGR valve (3). 4. Disconnect the air flow sensor (2).
  • Page 343 Steering bearing flange bolt 2.4 to 2.8 kgf·m (L3301/L3901) 17.3 to 20.2 lbf·ft (1) Suction Hose (6) Rail Pressure Sensor (2) Steering Joint Shaft (L3301/L3901) (7) Supply Pump (3) Delivery Pipe (8) Camshaft Position Sensor (4) Fuel Pump (9) Crank Shaft Position Sensor...
  • Page 344 L3301, L3901, L4701, WSM TRANSMISSION Propeller Shaft (L3301/L3901) 1. Remove the screw (4) then tap out the spring pin (3). 2. Slide the propeller shaft cover 1 (5) to the front and the cover 2 (6) to the rear. 3. Tap out the spring pins (1) and then slide the coupling (2) to the front and coupling (8) to the rear.
  • Page 345 L3301, L3901, L4701, WSM TRANSMISSION [B] Separating Clutch Housing Case Outer Components 1. Disconnect the throttle cable (15). 2. Remove the steering support (5). 3. Remove the grips (1), (2), and (14). 4. Remove the lever guides (3) and (13).
  • Page 346 L3301, L3901, L4701, WSM TRANSMISSION [C] Separating Transmission Case Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 347 L3301, L3901, L4701, WSM TRANSMISSION Battery Negative Cable Connector 1. Open bonnet. 2. Disconnect battery negative cable connector (1). (1) Battery Negative Cable Connector 9Y1211012RAS0005US0 Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS"...
  • Page 348 L3301, L3901, L4701, WSM TRANSMISSION Outer Components 1. Place the disassembling stands under the transmission case. 2. Remove the grips (3), (4), and (5). 3. Remove the lever guides (1) and (6). 4. Remove the center cover (12) and floor sheet cover (7).
  • Page 349 L3301, L3901, L4701, WSM TRANSMISSION Separating Transmission Case and Clutch Housing 1. Check the clutch housing case and transmission case are securely mounted on the disassembling stands. 2. Loosen and remove the transmission case mounting nut. 3. Separate the transmission case from the clutch housing case.
  • Page 350 L3301, L3901, L4701, WSM TRANSMISSION Brake Case 1. Loosen and remove the brake case mounting screws and nuts. 2. Separate the brake case, tapping the brake case lever lightly. (When reassembling) • Apply grease to the brake ball seats. (Do not apply grease excessively.).

  • Page 351: Disassembling And Assembling (Manual Transmission Model)

    L3301, L3901, L4701, WSM TRANSMISSION (2) Disassembling and Assembling (Manual Transmission Model) [A] Clutch Housing Case Release Hub and Clutch Lever 1. Remove the safety switch (4). 2. Remove the step brackets (6). 3. Disconnect the clutch rod (5) from clutch lever (3).
  • Page 352 L3301, L3901, L4701, WSM TRANSMISSION Synchro-shuttle Gear Assembly 1. Remove the shuttle lever stopper screw (1). 2. Remove the bearing holder (3) with synchro-shuttle assembly. (When reassembling) • Reinstall the synchronizer keys (17) in the key grooves of the synchronizer rings (16) firmly.
  • Page 353 L3301, L3901, L4701, WSM TRANSMISSION Counter Shaft 1. Remove the bearing cover (2). 2. Screw down the two M6 screws in to bearing cover and pull it out. 3. Remove the screws (3) and remove the springs and balls. 4. Tap out the spring pins (4).
  • Page 354 L3301, L3901, L4701, WSM TRANSMISSION Main Shaft and PTO Counter Shaft 1. Remove the screws (1), (2) and remove the spring (3) and ball (4). 2. Tap out the spring pin (5). 3. Draw out the fork rod (7) to front.
  • Page 355 L3301, L3901, L4701, WSM TRANSMISSION [B] Transmission Case Front Drive Case 1. Remove the front drive case. 2. Remove the oil seal (1). 3. Tap out the propeller shaft 1 (3) to the front. 4. Remove the shift gear (6).
  • Page 356 L3301, L3901, L4701, WSM TRANSMISSION PTO Shaft 1. Remove the internal snap ring (1). 2. Tap out the PTO shaft (3) to the front "A". (When reassembling) • In the staking nut (2) was removed, replace a new one, and after tightening it to the specified torque, be sure to stake it firmly.
  • Page 357 L3301, L3901, L4701, WSM TRANSMISSION Range Gear Shaft 1. Remove the bearing stoppers (1), shift fork rod stopper (4) and stopper screw (5). 2. Slide the shift arm (6) to outside. 3. Remove the bearing (2) with puller. 4. Remove the 18T-31T range gear shaft (3).
  • Page 358 L3301, L3901, L4701, WSM TRANSMISSION Pinion Shaft 1. Remove the lock nut (3). 2. Remove the pinion bearing cover (2), shim (8) and tapper roller bearing (6). 3. Move the 6T pinion shaft assembly backward and then remove the 42T gear and the 6T pinion shaft (14) assembly.
  • Page 359 L3301, L3901, L4701, WSM TRANSMISSION [C] Differential Gear Assembly Bearing and Differential Lock Shifter 1. Secure the differential gear in a vise. 2. Remove the ball bearing with a puller. 3. Remove the differential lock shifter. 9Y1211012TRS0048US0 Spiral Bevel Gear 1.

  • Page 360: Disassembling And Assembling (Hst Model)

    L3301, L3901, L4701, WSM TRANSMISSION (3) Disassembling and Assembling (HST Model) [A] Clutch Housing Case Clutch Lever, Release Fork and Release Bearing 1. Remove the release fork mounting screws (2). 2. Draw out the clutch lever (3) to remove the release fork (1).
  • Page 361 L3301, L3901, L4701, WSM TRANSMISSION Port Block 1. Remove the port block mounting hex. head screws. 2. Pull and remove the port block (1) from clutch housing. (When reassembling) • Install port block (1) with valve plates (2), (3) and new gasket (4) in place.
  • Page 362 L3301, L3901, L4701, WSM TRANSMISSION Readjustment of Relief Valve (When the HST does not work due to its loose hexagon socket head screw) IMPORTANT • The KUBOTA does not recommend the readjustment of relief valve. And KUBOTA will recommend the exhaust with genuine parts.
  • Page 363 L3301, L3901, L4701, WSM TRANSMISSION Shaft Case, Input Shaft and Gear 1. Remove the shaft case mounting screws. 2. Screw down the two M6 screws into the shaft case (1). 3. Remove the shaft case (1) with the input shaft assembly.
  • Page 364 L3301, L3901, L4701, WSM TRANSMISSION Cylinder Block Assemblies 1. Remove the motor swashplate setting hex. head screw (1). 2. Remove the motor cylinder block assembly (3) with a motor shaft (2). 3. Remove the pump cylinder block assembly (7) and pump shaft (8).
  • Page 365 L3301, L3901, L4701, WSM TRANSMISSION Trunnion 1. Remove the internal cir-clip (1) both side. 2. Remove the cover (2) and (4). 3. Remove the trunnion (3). (When reassembling) • Apply transmission oil to the O-ring. NOTE • Be careful not to damage the O-ring with cover (4).
  • Page 366 L3301, L3901, L4701, WSM TRANSMISSION [B] Mid Case PTO Clutch 1. Remove the PTO clutch mounting screw (1). 2. Remove the washer (2), clutch cam (3) and spring (4). (When reassembling) 61 to 70 N·m Tightening torque Clutch cam mounting screw 6.2 to 7.2 kgf·m...
  • Page 367 L3301, L3901, L4701, WSM TRANSMISSION [C] Transmission Case Hydraulic Cylinder Assembly 1. Loosen and remove the hydraulic cylinder assembly mounting screws and nuts. 2. Support the hydraulic cylinder assembly with nylon lift strap and hoist, and then remove it. (When reassembling) •...
  • Page 368 L3301, L3901, L4701, WSM TRANSMISSION Gear and Shaft Assembly 1. Remove the spacer mounting screws. 2. Separate the spacer (1) from the transmission case. 3. Remove the 16T gear shaft assembly (2). 4. remove the pinion shaft assembly (3) and PTO drive shaft assembly (4).
  • Page 369 L3301, L3901, L4701, WSM TRANSMISSION Brake Case 1. Loosen the remove the brake case mounting screws and nut. 2. Separate the brake case, tapping the brake case lever lightly. (When reassembling) • Apply grease to the brake ball seats. (Do not grease excessively.)
  • Page 370 L3301, L3901, L4701, WSM TRANSMISSION PTO Bearing Case 1. Remove the bearing case (2) mounting screws. 2. Remove the PTO shaft (1) with bearing case. (1) PTO Shaft (2) PTO Bearing Case 9Y1211012TRS0071US0 PTO Shaft 1. Remove the internal cir-clip (2).
  • Page 371 L3301, L3901, L4701, WSM TRANSMISSION [D] Differential Gear Assembly Bearing and Differential Lock Shifter 1. Secure the differential gear in a vise. 2. Remove the ball bearing with a puller. 3. Remove the differential lock shifter. 9Y1211012TRS0048US0 Spiral Bevel Gear 1.

  • Page 372: L4701

    L3301, L3901, L4701, WSM TRANSMISSION [2] L4701 (1) Preparation [A] Separating Engine and Clutch Housing Case Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 373 L3301, L3901, L4701, WSM TRANSMISSION Bonnet and Side Covers 1. Disconnect the headlight connector (1). 2. Remove the bolt (2) from the bonnet bracket. 3. Disconnect the damper (3) from the bonnet. 4. Remove the bonnet (4). 5. Remove the R.H. and L.H. side covers (5).
  • Page 374 L3301, L3901, L4701, WSM TRANSMISSION Fuel Tank and Base 1. Disconnect the fuel sensor (4). 2. Disconnect the fuel return line (1). 3. Remove the fuel tank band (2). 4. Remove the fuel tank (3). 5. Disconnect the connector and hoses from the differential pressure sensor (6).
  • Page 375 L3301, L3901, L4701, WSM TRANSMISSION Hydraulic Pipes and Electrical Wiring (Under Fuel Tank Base and Left Side) 1. Disconnect the injector connectors (5). 2. Disconnect the glow plug (4). 3. Disconnect the EGR valve (3) connector. 4. Disconnect the air flow sensor (2) connector.
  • Page 376 L3301, L3901, L4701, WSM TRANSMISSION Hydraulic Pipes and Electrical Wiring (Right Side) 1. Remove the suction hose (1). 2. Remove the delivery pipe (4). 3. Remove the EGR valve (2) connector. 4. Disconnect the crank position sensor (7). 5. Disconnect the fuel pump (8).
  • Page 377 L3301, L3901, L4701, WSM TRANSMISSION Power Steering Controller Hoses 1. Since identification tapes are not installed to the hoses, mark the hoses as shown in the picture. 2. After marking, disconnect the left delivery hose (3) and the right delivery hose (1).
  • Page 378 L3301, L3901, L4701, WSM TRANSMISSION Propeller Shaft (L4701) 1. Remove the bracket 1 (1). 2. Remove the bracket 2 (2). 3. Slide the propeller shaft cover 2 (8) to the front and the propeller shaft cover 1 (3) to the rear.
  • Page 379 L3301, L3901, L4701, WSM TRANSMISSION [B] Separating Clutch Housing and Mid Case Outer Components 1. Remove the mounting bolts and the steering support (1). 2. Disconnect the differential lock pedal. 3. Remove the step (2) and the main wiring harness.
  • Page 380 L3301, L3901, L4701, WSM TRANSMISSION Separating Mid Case from Transmission Case 1. Loosen and remove screws and nuts securing mid case (1) to transmission case (2). 2. Separate mid case from transmission case (2). (When reassembling) • Apply liquid gasket (Three Bond 1208D or equivalent) to joint face of mid case and transmission case after eliminate water, oil and stuck liquid gasket.
  • Page 381 L3301, L3901, L4701, WSM TRANSMISSION [C] Separating Transmission Case Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 382 L3301, L3901, L4701, WSM TRANSMISSION Three Point Linkage and ROPS 1. Secure the ROPS (1) with safety strap (2). 2. Remove the stabilizer joint (5), the top link (8), the lift rods (6) and the lower links (7). 3. Remove ROPS mounting screws (4), and remove the ROPS.
  • Page 383 L3301, L3901, L4701, WSM TRANSMISSION Suction Pipe and Hydraulic Block 1. Remove the suction pipe (5). 2. Remove the hydraulic block (3). 3. Remove 3P delivery pipe (1). 4. Remove the brake connecting rod R.H. (4) and L.H.. (When reassembling) •...
  • Page 384 L3301, L3901, L4701, WSM TRANSMISSION Separating Mid Case from Transmission Case 1. Loosen and remove screws and nuts securing mid case (1) to transmission case (2). 2. Separate mid case from transmission case (2). (When reassembling) • Apply liquid gasket (Three Bond 1208D or equivalent) to joint face of mid case and transmission case after eliminate water, oil and stuck liquid gasket.

  • Page 385: Disassembling And Assembling (Manual Transmission Model)

    L3301, L3901, L4701, WSM TRANSMISSION Brake Case 1. Remove the brake case mounting screws and nuts. 2. Separate the brake case, tapping the brake case lever lightly. (When reassembling) • Apply grease to the brake ball seats. (Do not grease excessively.).
  • Page 386 L3301, L3901, L4701, WSM TRANSMISSION Shaft Case 1. Remove the shaft case mounting screws. 2. Remove the shaft case (1) by using jack screw M6. (When reassembling) • Replace the gasket with a new one. (When replacing oil seal in shaft case) •...
  • Page 387 L3301, L3901, L4701, WSM TRANSMISSION Clutch Housing Bearing Holder 1. Remove clutch housing bearing holder (2) mounting screws. 2. Remove three interlock balls (4) after removing stopper screw (1). 3. Pull out clutch housing bearing holder (2) by using two jack screws (6) M8 to the hole "A".
  • Page 388 L3301, L3901, L4701, WSM TRANSMISSION Gear Shaft Assemblies 1. Remove shift fork assembly (1), (2) together with main gear shaft assembly (3). 2. Remove counter gear shaft assembly (4), the PTO counter gear shaft assembly (5), the PTO gear shaft assembly (6), and then the main shaft (7).
  • Page 389 L3301, L3901, L4701, WSM TRANSMISSION Assembling Shafts to Clutch Housing Case 1. Turn the clutch housing case vertical. 2. Assemble all shafts to the clutch housing case. 3. Install the rear cover. 4. Tighten the rear cover mounting bolts to the tightening torque.
  • Page 390 L3301, L3901, L4701, WSM TRANSMISSION [B] Mid Case PTO Clutch Valve and PTO Clutch Holder 1. Remove PTO clutch valve (1). 2. Remove PTO clutch holder (6) together with PTO clutch pack (5) by using two jack screw M8 to the holes "A" of the PTO clutch holder (6).
  • Page 391 L3301, L3901, L4701, WSM TRANSMISSION Removing Clutch Hub, Clutch Disks and Clutch Plates 1. Remove the snap ring (2) and the back plate (3). 2. Remove the clutch hub (1), the plates (17) and the disks (18) from the PTO clutch case (6).
  • Page 392 L3301, L3901, L4701, WSM TRANSMISSION Removing Piston and PTO Brake Disk 1. Depress the return spring (3) by using a jig (10). 2. Remove the cir-clip (1) form the PTO clutch case (7). 3. Remove the piston (4). 4. Remove the brake plate (5) and the brake disk (6).
  • Page 393 L3301, L3901, L4701, WSM TRANSMISSION Transmission Bearing Holder 1. Remove spring pin (2) holding hi-shift fork rod (3) to transmission bearing holder (1). 2. Remove transmission bearing holder by using 2 jack screws M8 (4). (1) Transmission Bearing Holder (3) Hi-Shift Fork Rod...
  • Page 394 L3301, L3901, L4701, WSM TRANSMISSION Shaft Assemblies 1. Remove front wheel drive gear shaft assembly (6). 2. Remove pinion gear shaft assembly (1). 3. Remove PTO gear shaft assembly (5). (1) Pinion Gear Shaft Assembly (5) PTO Gear Shaft Assembly...
  • Page 395 L3301, L3901, L4701, WSM TRANSMISSION (Continued) 4. Remove the Hi-Lo gear shaft assembly (3). 5. Remove the Hi-Lo gear fork rod (2) and the front wheel drive shift lever (4). (1) Pinion Gear Shaft Assembly (3) Hi-Lo Gear Shaft Assembly...
  • Page 396 L3301, L3901, L4701, WSM TRANSMISSION PTO Shaft 1. Remove the PTO shaft cover. 2. Remove the bearing case mounting screws, and draw out the PTO shaft (1) with bearing case (2). 3. Remove the internal snap ring (3). 4. Tap out the PTO shaft (1) to the front.
  • Page 397 L3301, L3901, L4701, WSM TRANSMISSION Differential Case Cover and Differential Side Gear 1. Remove the differential case cover (3). 2. Remove the differential side gear (1) and differential side gear washer (2). (When reassembling) • Apply molybdenum disulfide (Three Bond 1901 or equivalent) to the inner circumferential surface of the differential side gear boss.

  • Page 398: Disassembling And Assembling (Hst Model)

    L3301, L3901, L4701, WSM TRANSMISSION (3) Disassembling and Assembling (HST Model) [A] HST Housing Case Clutch Lever, Release Fork and Release Bearing 1. Remove the release fork mounting bolts (2). 2. Draw out the clutch lever (3) to remove the release fork (1).
  • Page 399 L3301, L3901, L4701, WSM TRANSMISSION HST Gear and Bearing 1. Remove the 27T HST gear (3) with the bearings (2), (4) from the HST housing case. 2. Remove the ball bearing (2) and the bearing (4) from the 27T HST gear (3).
  • Page 400 L3301, L3901, L4701, WSM TRANSMISSION Port Block 1. Remove the port block mounting hex. head screws (1). 2. Pull and remove the port block (2). 3. Remove the gasket between port block (2) and the HST housing case (10). (When reassembling) •...
  • Page 401 L3301, L3901, L4701, WSM TRANSMISSION Cylinder Block Assemblies 1. Remove the cylinder block assemblies (1), (4) with pistons (5), (6). (When reassembling) • Apply clean transmission oil to cylinder blocks. NOTE • Be careful not to damage the surface of the cylinder blocks and the pistons.
  • Page 402 L3301, L3901, L4701, WSM TRANSMISSION Swashplate and Pump Shaft 1. Remove the swashplate (3) from the pump shaft (2). 2. Remove the cradle bearing bracket mounting hex. head screws (6). 3. Tap the pump shaft (2) with a plastic hammer slightly to slide out it with cradle bearing bracket (5) and the ball bearing (9) to the rear side.
  • Page 403 L3301, L3901, L4701, WSM TRANSMISSION Charge Relief Valve 1. Remove the hex. head plug (5). 2. Remove the spring guide (3), the shim (if installed), the spring (2) and the valve poppet (1). NOTE • Install the valve component, noting the number of the shims in the charge relief valve.
  • Page 404 L3301, L3901, L4701, WSM TRANSMISSION Servo Piston Assembly 1. Remove the servo piston assembly mounting hex. head screws (1). 2. Remove the servo piston under cover mounting hex. head screws (6). 3. Remove the servo piston assembly (2). (When reassembling) NOTE •...
  • Page 405 L3301, L3901, L4701, WSM TRANSMISSION Checking and Adjusting HST Neutral Position CAUTION • Park the tractor on a flat place and keep all the levers at "Neutral" position. • Jack up the tractor rear axle and set the front drive lever to "2WD"...
  • Page 406 L3301, L3901, L4701, WSM TRANSMISSION [B] Mid Case Mid Case Bearing Holder and Gear Shafts 1. Remove the bearing holder mounting bolts. 2. Remove the mid case bearing holder (5). 3. Remove the shafts (1), (2), (3), (4). 4. Remove the PTO clutch valve (9) from the mid case.
  • Page 407 L3301, L3901, L4701, WSM TRANSMISSION Disassembling PTO Clutch Assembly 1. Remove the snap ring (2) and the back plate (3). 2. Remove the clutch hub (1), the plates (17) and the disks (18) from the PTO clutch case (6). 3. Remove the cir-clip (11).
  • Page 408 L3301, L3901, L4701, WSM TRANSMISSION Removing Piston and PTO Brake Disk 1. Depress the return spring (3) by using a jig (10). 2. Remove the cir-clip (1) form the PTO clutch case (7). 3. Remove the piston (4). 4. Remove the brake plate (5) and the brake disk (6).
  • Page 409 L3301, L3901, L4701, WSM TRANSMISSION Transmission Bearing Holder 1. Remove spring pin (2) holding hi-shift fork rod (3) to transmission bearing holder (1). 2. Remove transmission bearing holder by using 2 jack screws M8 (4). (1) Transmission Bearing Holder (3) Hi-Shift Fork Rod...
  • Page 410 L3301, L3901, L4701, WSM TRANSMISSION Shaft Assemblies 1. Remove front wheel drive gear shaft assembly (6). 2. Remove pinion gear shaft assembly (1). 3. Remove PTO gear shaft assembly (5). (1) Pinion Gear Shaft Assembly (5) PTO Gear Shaft Assembly...
  • Page 411 L3301, L3901, L4701, WSM TRANSMISSION (Continued) 4. Remove the Hi-Lo gear shaft assembly (3). 5. Remove the Hi-Lo gear fork rod (2) and the front wheel drive shift lever (4). (1) Pinion Gear Shaft Assembly (3) Hi-Lo Gear Shaft Assembly...

  • Page 412: Servicing

    L3301, L3901, L4701, WSM TRANSMISSION 6. SERVICING [1] L3301/L3901 (1) Clutch Housing Case [A] Manual Transmission Model Gear Backlash 1. Set a dial indicator (lever type) on one of the tooth faces. 2. Clamp the mating gear. 3. Measure backlash by turning the gear to be measured.
  • Page 413 L3301, L3901, L4701, WSM TRANSMISSION Checking Contact between Coupling and Shifter 1. Check to see if there is flaw or wear on the spline of the coupling and shifter, and the ley groove on the coupling. 2. Engage the shifter with the coupling, and check that they slide smoothly.
  • Page 414 L3301, L3901, L4701, WSM TRANSMISSION Valve Plate 1. Check the engagement of the valve plate (2), (3) and the anchor pin (1). 2. Pushing the valve plate against the anchor pin, lift it to remove. 3. Check the valve plate for foreign particles.
  • Page 415 L3301, L3901, L4701, WSM TRANSMISSION Thrust Plate and Swashplate 1. Check the piston contact face of the thrust plate (1), and the thrust plate contact face of the swashplate (2) for scratches and excessive wear. 2. If the thrust plate (1) and the swashplate (2) are worn and scored, replace them.

  • Page 416: Transmission Case

    L3301, L3901, L4701, WSM TRANSMISSION (2) Transmission Case Checking Bearing 1. Hold the inner race, and push and pull the outer race in all directions to check for wear and roughness. 2. Apply transmission fluid to the bearing, and hold the inner race.
  • Page 417 L3301, L3901, L4701, WSM TRANSMISSION Spiral Bevel Pinion Turning Torque (with Differential Gear) 1. Grip the spiral bevel pinion nut with a torque wrench and measure the turning torque. 2. If the turning torque is not within the factory specifications, check the differential gear turning force, backlash and tooth contact again.
  • Page 418 L3301, L3901, L4701, WSM TRANSMISSION Proper Contact More than 35 % red lead contact area on the gear tooth surface. The center of tooth contact at 1/3 of the entire width from the small end. (A) Proper Contact 9Y1211012TRS0152US0 Heel Contact and Tip Contact Replace the adjusting shim with thicker one to move the bevel pinion shaft forward.
  • Page 419 L3301, L3901, L4701, WSM TRANSMISSION Clearance between Differential Pinion Shaft and Differential Pinion 1. Measure the differential pinion shaft O.D. 2. Measure the differential pinion I.D. and calculate the clearance. 3. If the clearance exceed the allowable limit, replace them.

  • Page 420: L4701

    L3301, L3901, L4701, WSM TRANSMISSION [2] L4701 (1) Clutch Housing Case [A] Manual Transmission Model Checking Bearing 1. Hold the inner race, and push and pull the outer race in all directions to check for wear and roughness. 2. Apply transmission fluid to the bearing, and hold the inner race.
  • Page 421 L3301, L3901, L4701, WSM TRANSMISSION [B] HST Model Charge Pump 1. Check the charge pump case (3), the inner rotor (2) and the outer rotor (1) for scratches and wear. 2. If scratch or wear are found, replace the charge pump as an assembly.
  • Page 422 L3301, L3901, L4701, WSM TRANSMISSION Valve Plate 1. Check the engagement of the valve plate (2), (3) and the anchor pins (1). 2. Pushing the valve plate (2), (3) against the anchor pins (1), remove the valve plate (2), (3).
  • Page 423 L3301, L3901, L4701, WSM TRANSMISSION Check and High Pressure Relief Valve 1. Check the valve plug (1) and the valve (4), (5) for scratches and damage. 2. Check the spring (3) for damage. 3. If anything is unusual, replace the check and high pressure relief valve as an assembly.

  • Page 424: Mid Case

    L3301, L3901, L4701, WSM TRANSMISSION (2) Mid Case Clutch Disc Wear 1. Measure the thickness of PTO clutch disc with vernier calipers. 2. If the thickness is less than the allowable limit, replace it. 1.70 to 1.90 mm Factory specification 0.067 to 0.075 in.

  • Page 425: Transmission Case

    L3301, L3901, L4701, WSM TRANSMISSION Thickness of Seal Ring 1. Measure the thickness of seal rings (1) with an outside micrometer. 2. If the measurement is less than the allowable limit, replace it. 2.45 to 2.50 mm Factory specification 0.096 to 0.098 in.
  • Page 426 L3301, L3901, L4701, WSM TRANSMISSION Clearance between Shift Fork and Shift Gear Groove or Shifter Groove 1. Place for in the groove to check clearance with feeler gauge. 2. If the clearance exceeds allowable limit, replace. 0.15 to 0.40 mm...
  • Page 427 L3301, L3901, L4701, WSM TRANSMISSION Backlash and Tooth Contact between Spiral Bevel Gear and Spiral Bevel Pinion Shaft 1. Set the dial indicator (lever type) with its finger on the tooth surface. 2. Measure the backlash by fixing the spiral bevel pinion shaft (3) and moving the spiral bevel gear (4) by hand.
  • Page 428 L3301, L3901, L4701, WSM TRANSMISSION Proper Contact More than 35 % red lead contact area on the gear tooth surface. The center of tooth contact at 1/3 of the entire width from the small end. (A) Proper Contact 9Y1211012TRS0152US0 Heel Contact and Tip Contact Replace the adjusting shim with thicker one to move the bevel pinion shaft forward.
  • Page 429 L3301, L3901, L4701, WSM TRANSMISSION Clearance between Differential Pinion Shaft and Differential Pinion 1. Measure the differential pinion shaft O.D. 2. Measure the differential pinion I.D. and calculate the clearance. 3. If the clearance exceed the allowable limit, replace them.

  • Page 430: Rear Axle

    REAR AXLE KiSC issued 09, 2016 A...
  • Page 431 MECHANISM CONTENTS 1. STRUCTURE..........................4-M1 KiSC issued 09, 2016 A...
  • Page 432 L3301, L3901, L4701, WSM REAR AXLE 1. STRUCTURE L3301/L3901 (1) Ball Bearing (2) Rear Axle (3) Rear Axle Case (4) Differential Gear Shaft (5) Brake Case (6) Brake Disc (7) Differential Lock Shift Fork (8) 39T Bevel Gear (9) Differential Pinion...
  • Page 433 SERVICING CONTENTS 1. TROUBLESHOOTING.........................4-S1 2. TIGHTENING TORQUES......................4-S2 3. DISASSEMBLING AND ASSEMBLING ..................4-S3 [1] SEPARATING REAR AXLE CASE ..................4-S3 [2] DISASSEMBLING REAR AXLE ....................4-S8 4. SERVICING ..........................4-S9 KiSC issued 09, 2016 A...

  • Page 434: Troubleshooting

    L3301, L3901, L4701, WSM REAR AXLE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive or Unusual Improper backlash between differential gear Replace – Noise at All Time shaft and final gear Bearing worn Replace 4-S9 Insufficient or improper type of transmission fluid...
  • Page 435 86.8 to 101 Rear axle case mounting M10 bolts 48.0 to 55.9 4.9 to 5.7 36 to 41 Rear axle case mounting M10 nuts (L3301/L3901) 48.1 to 55.9 4.9 to 5.7 36 to 41 Rear axle case mounting M10 nuts (L4701) 60.8 to 70.6...

  • Page 436: Disassembling And Assembling

    L3301, L3901, L4701, WSM REAR AXLE 3. DISASSEMBLING AND ASSEMBLING [1] SEPARATING REAR AXLE CASE Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 437 L3301, L3901, L4701, WSM REAR AXLE Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 438 L3301, L3901, L4701, WSM REAR AXLE Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS" (see page G-95.)) to the front axle bracket and chock wheels. (1) Front Axle Rocking Restrictor 9Y1211012RAS0006US0 Three Point Linkage 1.
  • Page 439 4. Remove the floor seat cover (4). 5. Remove the center cover (5). (1) Seat Switch Connector (4) Floor Seat Cover (2) Position Control Lever Guide (5) Center Cover (L3301/L3901 Only) (3) Lever Guide 9Y1211012RAS0010US0 4-S6 KiSC issued 09, 2016 A...
  • Page 440 L3301, L3901, L4701, WSM REAR AXLE Fender 1. Remove the fenders (1). (1) Fender 9Y1211012RAS0011US0 Rear Axle Case 1. Loosen and remove the rear axle case mounting screws and nuts. 2. Support the rear axle case (1) with the nylon lift strap and hoist.

  • Page 441: Disassembling Rear Axle

    L3301, L3901, L4701, WSM REAR AXLE [2] DISASSEMBLING REAR AXLE (1) Rear Axle (2) Oil Seal (3) Internal Snap Ring (4) Ball Bearing (5) Spacer (6) Rear Axle Case (7) Gear (8) Lock Nut (9) Ball Bearing (10) Ball Bearing 1.
  • Page 442 L3301, L3901, L4701, WSM REAR AXLE 4. SERVICING Checking Bearing 1. Hold the inner race, and push and pull the outer race in all directions to check for wear and roughness. 2. Apply transmission fluid to the bearing, and hold the inner race.
  • Page 443 BRAKES KiSC issued 09, 2016 A...
  • Page 444 MECHANISM CONTENTS 1. STRUCTURE..........................5-M1 2. OPERATION..........................5-M2 KiSC issued 09, 2016 A...
  • Page 445 L3301, L3901, L4701, WSM BRAKES 1. STRUCTURE L3301/L3901 (1) Brake Case (2) Cam Plate (3) Brake Cam (4) Brake Cam Lever (5) Brake Rod (6) Brake Pedal 9Y1211012BRM0001US0 L4701 (1) Brake Case (2) Brake Cam Lever (3) Parking Brake Lever...
  • Page 446 L3301, L3901, L4701, WSM BRAKES 2. OPERATION (1) Cam Plate (4) Brake Case (6) Brake Shaft (7) Brake Cam (2) Steel Plate (5) Steel Ball (Differential Gear Shaft) (8) Brake Cam Lever (3) Brake Disc The brake body is incorporated in the brake case (4) filled with transmission oil and is designed to brake when the brake disc (3) splined with the differential gear shaft (6) is pressed against the cam plate (1) by means of the cam mechanism incorporating steel balls (5).

  • Page 447: Servicing

    SERVICING CONTENTS 1. TROUBLESHOOTING.........................5-S1 2. SERVICING SPECIFICATIONS ....................5-S2 3. TIGHTENING TORQUES......................5-S3 4. CHECKING AND ADJUSTING....................5-S4 5. DISASSEMBLING AND ASSEMBLING ..................5-S5 [1] SEPARATING BRAKE CASE ....................5-S5 [2] DISASSEMBLING THE BRAKE CASE ................5-S11 6. SERVICING ..........................5-S12 KiSC issued 09, 2016 A...

  • Page 448: Troubleshooting

    L3301, L3901, L4701, WSM BRAKES 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Uneven Braking Brake pedal play unevenly adjusted Adjust 5-S4 Force Brake disc worn Replace 5-S11, 5-S12 Cam plate warped Replace 5-S11, 5-S12 Brake Drags Too little free play in the brake pedals...

  • Page 449: Servicing Specifications

    L3301, L3901, L4701, WSM BRAKES 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Brake Pedal Free Travel 15 to 20 mm – 0.6 to 0.8 in. Cam Plate Flatness – 0.3 mm 0.01 in. Cam Plate and Ball Height 20.9 to 21.1 mm 20.5 mm...
  • Page 450 86.8 to 101 Rear axle case mounting M10 bolts 48.0 to 55.9 4.9 to 5.7 36 to 41 Rear axle case mounting M10 nuts (L3301/L3901) 48.1 to 55.9 4.9 to 5.7 36 to 41 Rear axle case mounting M10 nuts (L4701) 60.8 to 70.6...

  • Page 451: Checking And Adjusting

    L3301, L3901, L4701, WSM BRAKES 4. CHECKING AND ADJUSTING Brake Pedal Free Travel CAUTION • Stop the engine and remove the key, then chock the wheel before checking brake pedals. 1. Release the parking brake. 2. Slightly depress the brake pedals and measure free travel "C"...

  • Page 452: Disassembling And Assembling

    L3301, L3901, L4701, WSM BRAKES 5. DISASSEMBLING AND ASSEMBLING [1] SEPARATING BRAKE CASE Draining Transmission Fluid (L3301/L3901) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 453 L3301, L3901, L4701, WSM BRAKES Draining Transmission Fluid (L4701) CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 454 L3301, L3901, L4701, WSM BRAKES Front Axle Rocking Restrictor 1. Install the front axle rocking restrictor (1) (refer to "SPECIAL TOOLS" (see page G-95.)) to the front axle bracket and chock wheels. (1) Front Axle Rocking Restrictor 9Y1211012RAS0006US0 Three Point Linkage 1.
  • Page 455 4. Remove the floor seat cover (4). 5. Remove the center cover (5). (1) Seat Switch Connector (4) Floor Seat Cover (2) Position Control Lever Guide (5) Center Cover (L3301/L3901 Only) (3) Lever Guide 9Y1211012RAS0010US0 5-S8 KiSC issued 09, 2016 A...
  • Page 456 L3301, L3901, L4701, WSM BRAKES Fender 1. Remove the fenders (1). (1) Fender 9Y1211012RAS0011US0 Rear Axle Case 1. Loosen and remove the rear axle case mounting screws and nuts. 2. Support the rear axle case (1) with the nylon lift strap and hoist.
  • Page 457 L3301, L3901, L4701, WSM BRAKES Brake Case (L3301/L3901) 1. Remove the suction pipe (1). 2. Remove the brake rod (2). 3. Separate the brake case (4), tapping the brake cam lever (3). (When reassembling) • Apply grease to the brake ball seats. (Do not grease excessively.)

  • Page 458: Disassembling The Brake Case

    L3301, L3901, L4701, WSM BRAKES [2] DISASSEMBLING THE BRAKE CASE Brake Case (1) Ball Seat (2) Ball (3) Cam Plate (4) Brake Disc (5) Plate (6) Brake Case (7) Brake Cam (8) O-ring (9) Brake Cam Lever  It is possible to disassemble as shown in the figure above.

  • Page 459: Servicing

    L3301, L3901, L4701, WSM BRAKES 6. SERVICING Brake Cam Lever Movement 1. Move the brake cam lever by hand to check the movement. 2. If the movement is heavy, refine the brake cam with sandpaper. 9Y1211012BRS0009US0 Cam Plate Flatness 1. Place the cam plate on the surface plate.

  • Page 460: Front Axle

    FRONT AXLE KiSC issued 09, 2016 A...
  • Page 461 MECHANISM CONTENTS 1. STRUCTURE..........................6-M1 [1] 2WD Model........................... 6-M1 [2] 4WD Model........................... 6-M2 KiSC issued 09, 2016 A...
  • Page 462 L3301, L3901, L4701, WSM FRONT AXLE 1. STRUCTURE [1] 2WD Model L3301/L3901 L4701 (1) Slotted Nut (8) Front Axle Frame (14) Dust Cover (20) Taper Roller Bearing (2) Plain Washer (9) Bushing (15) Oil Seal (21) Front Wheel Cap (3) Front Wheel Hub...
  • Page 463 L3301, L3901, L4701, WSM FRONT AXLE [2] 4WD Model (1) Front Axle (13) Shim (25) Collar (37) Ball Bearing (2) Collar (14) Ball Bearing (26) Collar (38) Oil Seal (3) Oil Seal (15) Shim (27) Collar (39) Ball Bearing (4) Ball Bearing...
  • Page 464 2. SERVICING SPECIFICATIONS ....................6-S2 3. TIGHTENING TORQUES......................6-S5 4. CHECKING AND ADJUSTING....................6-S6 5. DISASSEMBLING AND ASSEMBLING ..................6-S9 [1] L3301/L3901..........................6-S9 (1) Separating Front Axle from Front Axle Frame..............6-S9 (2) Disassembling Front Axle....................6-S12 [2] L4701...........................6-S17 (1) Separating Front Axle from Front Axle Frame...............6-S17 (2) Disassembling Front Axle....................6-S19...

  • Page 465: Troubleshooting

    L3301, L3901, L4701, WSM FRONT AXLE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Front Wheels Wander Tire pressure uneven Adjust G-99 to Right or Left Improper toe-in adjustment (improper alignment) Adjust 6-S6 Clearance between front axle middle boss and...

  • Page 466: Servicing Specifications

    L3301, L3901, L4701, WSM FRONT AXLE 2. SERVICING SPECIFICATIONS [2WD] Item Factory Specification Allowable Limit Toe-in 2 to 8 mm – 0.08 to 0.31 in. Front Wheel Axial Sway Less than – 5.0 mm 0.20 in. Front Axle Rocking Force 49 to 196 N·m...
  • Page 467 L3301, L3901, L4701, WSM FRONT AXLE [4WD] Item Factory Specification Allowable Limit Toe-in 2 to 8 mm – 0.08 to 0.3 in. Front Wheel Axial Sway Less than – 5.0 mm 0.20 in. Front Axle Rocking Force 49 to 196 N·m –...
  • Page 468 L3301, L3901, L4701, WSM FRONT AXLE Item Factory Specification Allowable Limit Front Axle Case Boss (Rear) to Bracket Clearance 0.100 to 0.292 mm 1.0 mm Bushing 0.00394 to 0.01150 in. 0.03937 in. • Front Axle Case Boss (Rear) O.D. 69.970 to 70.000 mm –...
  • Page 469 83.2 to 90.4 Tie-rod lock nut (L4701) 83.3 to 88.2 8.5 to 9.0 62 to 65 Front axle rocking force adjusting bolt [L3301/L3901] 23 to 27 2.4 to 2.7 17 to 19 Lock nut (front axle rocking force) [L4701] 98 to 147 10.0 to 14.9...

  • Page 470: Checking And Adjusting

    L3301, L3901, L4701, WSM FRONT AXLE 4. CHECKING AND ADJUSTING Toe-in 1. Park the tractor on the flat place. 2. Inflate the tires to the specified pressure. 3. Turn steering wheel so front wheels are in the straight ahead position.
  • Page 471 L3301, L3901, L4701, WSM FRONT AXLE Axial Sway of Front Wheel 1. Jack up the front side of tractor. 2. Set a dial gauge on the outside of rim. 3. Turn the wheel slowly and read the runout of rim.
  • Page 472 L3301, L3901, L4701, WSM FRONT AXLE Front Wheel Steering Angle [4WD] 1. Inflate the tires to the specified pressure. 2. Steer the wheels to the extreme right until the front gear case (1) contacts with the bevel gear case (2) at right hand side of the front axle.

  • Page 473: Disassembling And Assembling

    L3301, L3901, L4701, WSM FRONT AXLE 5. DISASSEMBLING AND ASSEMBLING [1] L3301/L3901 (1) Separating Front Axle from Front Axle Frame Draining Front Axle Case Oil [4WD] 1. Place the oil pans underneath the front axle case. 2. Remove the drain plug (1) both sides and filling port plug (3) to drain the oil.
  • Page 474 L3301, L3901, L4701, WSM FRONT AXLE Bumper and Tie-rods 1. Remove the bumper. 2. Remove the tie-rods with the tie-rod end lifter. In this case, take special care not to damage the tie-rod end nut (slotted nut). (It is preferable to replace it with an unrequired nut.)
  • Page 475 L3301, L3901, L4701, WSM FRONT AXLE Front Axle Assembly 1. Place the disassembling stand under the front axle, and hang up the front bumper by the hoist to support it. 2. Remove the shaft bracket 1 mounting screws and shaft bracket 2 mounting screws.

  • Page 476: Disassembling Front Axle

    L3301, L3901, L4701, WSM FRONT AXLE (2) Disassembling Front Axle [A] 2WD Model Front Wheel Hub 1. Remove the front wheel hub cap (1). 2. Draw out the cotter pin. 3. Remove the slotted nut (2). 4. Remove the collar.
  • Page 477 L3301, L3901, L4701, WSM FRONT AXLE Knuckle Shaft 1. Remove the knuckle arm (1) and draw out the knuckle shaft (4) from the front axle. (When reassembling) • Insert the thrust ball bearing (2) and oil seal (3), noting its direction.
  • Page 478 L3301, L3901, L4701, WSM FRONT AXLE Bevel Gear Case, Axle Flange and Front Gear Case 1. Remove the plug (4). 2. Remove the internal snap ring (3) and shim (2). 3. Remove the axle flange (1). 4. Tap out the bevel gear (6) and ball bearing.
  • Page 479 L3301, L3901, L4701, WSM FRONT AXLE Axle 1. Remove the bearing with a special use puller set. 2. Remove the bevel gear (2). 3. Remove out the collar (1). 4. Tap out the axle (3). (When reassembling) • Install the oil seal (5) of axle flange (4), noting its direction as shown in the figure below.
  • Page 480 L3301, L3901, L4701, WSM FRONT AXLE Spiral Bevel Pinion Shaft and Differential Gear Assembly 1. Remove the differential yoke shaft (11), (12) both sides. 2. Remove the oil seal (6) and internal snap ring (5). 3. Remove the plug (10), and then tap out the spiral bevel pinion shaft (3) by the brass rod and hammer.

  • Page 481: L4701

    L3301, L3901, L4701, WSM FRONT AXLE [2] L4701 (1) Separating Front Axle from Front Axle Frame Draining Front Axle Case Oil [4WD] 1. Place the oil pans underneath the front axle case. 2. Remove the drain plug (3) both sides and filling port plug (2) to drain the oil.
  • Page 482 L3301, L3901, L4701, WSM FRONT AXLE Power Steering Hoses 1. Remove cylinder covers (3). 2. Disconnect power steering hoses (1), (2) from steering cylinder. (When reassembling) • When connecting power steering hoses, hold joint with wrench not to turn the joint and tighten hoses.

  • Page 483: Disassembling Front Axle

    L3301, L3901, L4701, WSM FRONT AXLE (2) Disassembling Front Axle [A] 2WD Model Front Wheel Hub 1. Remove the cotter pin and remove the slotted nut (2). 2. Disconnect the knuckle arm (1) and tie-rod end (3). 3. Remove the front wheel cap (4).
  • Page 484 L3301, L3901, L4701, WSM FRONT AXLE Knuckle Shaft and Outer Front Axle 1. Remove the knuckle arm (1) and draw out the knuckle shaft (2) from the front axle. 2. Remove the outer front axle (3). (When reassembling) • Apply grease to the knuckle shaft (2) and thrust collar (4), (5).
  • Page 485 L3301, L3901, L4701, WSM FRONT AXLE [B] 4WD Model Tie-rods 1. Pull out the cotter pin and remove the tie-rod end slotted nuts. 2. Remove the tie-rod with a tie-rod end lifter. (When reassembling) • After tightening the tie-rod end nut to the specified torques, install a cotter pin as shown in the figure left.
  • Page 486 L3301, L3901, L4701, WSM FRONT AXLE Bevel Gear and Bevel Gear Shaft 1. Remove the plug (5). 2. Remove the internal snap ring (4) and shim (3). 3. Tap out the bevel gear (2) with ball bearing. 4. Draw out the bevel gear shaft (1).
  • Page 487 L3301, L3901, L4701, WSM FRONT AXLE Axle 1. Remove the bearing with a special use puller set. 2. Remove the bevel gear (2). 3. Remove the collar (1). 4. Tap out the axle (3). (When reassembling) • Install the oil seal (5) of axle flange (4), noting its direction as shown in the figure below.
  • Page 488 L3301, L3901, L4701, WSM FRONT AXLE Spiral Bevel Pinion Shaft and Differential Gear Assembly 1. Remove the differential yoke shaft (9), (10) both sides. 2. Remove the oil seal (6) and internal snap ring (5). 3. Remove the collar (4).
  • Page 489 L3301, L3901, L4701, WSM FRONT AXLE Differential Gear 1. Remove the differential case cover mounting screws (9) and then remove the differential case cover (5), ball bearing (6) and spiral bevel gear (7) as a unit. 2. Remove the external snap ring (8), and then remove the ball bearing (6) and spiral bevel gear (7) as a unit with a puller.

  • Page 490: Servicing

    L3301, L3901, L4701, WSM FRONT AXLE 6. SERVICING [1] 2WD MODEL Clearance between Front Axle Middle Boss and Shaft Bracket Bushing 1. Measure the front axle middle boss O.D. at several points where it contacts with the bushing. 2. Measure the shaft bracket 1 bushing I.D. and bracket 2 bushing I.D.
  • Page 491 L3301, L3901, L4701, WSM FRONT AXLE Clearance between Knuckle Shaft (Kingpin) and Bushing 1. Measure the shaft O.D. at several points where it contacts with the bushings. 2. Measure the bushing I.D. in the same method, and calculate the clearance.

  • Page 492: 4Wd Model

    L3301, L3901, L4701, WSM FRONT AXLE [2] 4WD MODEL Clearance between Differential Case (Differential Case Cover) and Differential Side Gear 1. Measure the differential side gear O.D.. 2. Measure the differential case bore I.D. and calculate the clearance. 3. Measure the differential case cover bore I.D. and calculate the clearance.
  • Page 493 L3301, L3901, L4701, WSM FRONT AXLE Backlash between Differential Pinon and Differential Side Gear 1. Set a dial gauge (lever type) on a tooth of the differential pinion. 2. Fix the differential side gear and move the differential pinion to measure the backlash.
  • Page 494 L3301, L3901, L4701, WSM FRONT AXLE Backlash between Spiral Bevel Pinion Shaft and Spiral Bevel Gear 1. Set a dial gauge (lever type) with its finger on the spline of spiral bevel pinion shaft. 2. Measure the backlash by moving the spiral bevel pinion shaft by hand lightly.
  • Page 495 L3301, L3901, L4701, WSM FRONT AXLE Backlash between 11T Bevel Gear and 42T Bevel Gear 1. Place plastigauge or wire of solder to three spots on the 42T bevel gear (1) with grease. 2. Fix the axle flange and front gear case.
  • Page 496 L3301, L3901, L4701, WSM FRONT AXLE Clearance between Front Axle Case Bosses and Bracket Bushings 1. Measure the front axle case bosses O.D. with an outside micrometer. 2. Measure the bracket bushing I.D. and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace the bracket bushing.
  • Page 497 STEERING KiSC issued 09, 2016 A...
  • Page 498 MECHANISM CONTENTS 1. STRUCTURE (L3301/L3901) ..................... 7-M1 [1] LINKAGE ..........................7-M1 [2] HYDRAULIC CIRCUIT ......................7-M2 [3] HYDRAULIC PUMP ......................7-M2 [4] STEERING GEAR BOX ....................... 7-M3 (1) STRUCTURE ......................... 7-M3 (2) OPERATION ........................7-M4 2. STRUCTURE (L4701) ........................ 7-M5 [1] LINKAGE ..........................

  • Page 499: Structure (L3301/L3901)

    L3301, L3901, L4701, WSM STEERING 1. STRUCTURE (L3301/L3901) [1] LINKAGE (1) Power Steering Controller (Steering Gear Box) (2) Joint Shaft 2 (3) Mini-Flange (4) Support (5) Joint Shaft (6) Steering Shaft (7) Bolt (8) Hydraulic Pump (9) Delivery Pipe (10) Return Hose...

  • Page 500: Hydraulic Circuit

    L3301, L3901, L4701, WSM STEERING [2] HYDRAULIC CIRCUIT (1) Sector Shaft (2) Ball Nut (Piston) (3) Worm Shaft (4) Control Valve (5) Relief Valve (6) Steering Wheel (7) Hydraulic Pump (8) Transmission Case (A) To Hydraulic Pump (Manual Transmission Model) (B) To HST Unit (HST Model) Control valve (4) is main part of Integral type power steering.

  • Page 501: Steering Gear Box

    L3301, L3901, L4701, WSM STEERING [4] STEERING GEAR BOX (1) STRUCTURE (1) Input Shaft (3) Sleeve (5) Main Shaft (7) Gear Box (2) Torsion Bar (4) Ball Nut (6) Sector Shaft (8) Adjust Screw This integral power steering mechanism consists of the following two major components as shown above: hydraulic control valve and steering force assist hydraulic cylinder.

  • Page 502: Operation

    L3301, L3901, L4701, WSM STEERING (2) OPERATION Neutral Position While the steering wheel is not moved, the torsion bar (2) is not twisted. There is no gap between the input shaft (1) and sleeve (3). This makes no pressure difference between the chambers "a" and "b" of the cylinder, which keeps the ball nut (4) and sector shaft (6) in their positions.

  • Page 503: Structure (L4701)

    L3301, L3901, L4701, WSM STEERING 2. STRUCTURE (L4701) [1] LINKAGE (1) Steering Wheel (3) Steering Shaft 2 (5) Steering Controller (7) Steering Cylinder (2) Steering Shaft 1 (4) Joint Shaft 2 (6) Hydraulic Pump Full hydrostatic type power steering is used on this model. The steering system consists of steering wheel, steering controller, steering cylinder and other components shown in the figure.

  • Page 504: Hydraulic Circuit

    L3301, L3901, L4701, WSM STEERING [2] HYDRAULIC CIRCUIT When the engine starts, the hydraulic pump (8) pressurize oil from transmission case (7) through oil filter (6) and send the oil, to the steering controller (3). The oil which has entered steering controller (3) is directed to control valve (10).

  • Page 505: Steering Controller

    L3301, L3901, L4701, WSM STEERING [4] STEERING CONTROLLER The steering controller mainly consists of a control valve, a metering device and a relief valve. The metering device comprises a set of special gears called "Gerotor". (1) Dowel Pin (6) Centering Spring...

  • Page 506: Oil Flow

    L3301, L3901, L4701, WSM STEERING (3) Oil Flow Neutral Position When the steering wheel (1) is not being turned, valve plate (2) is held in the neutral position by centering spring. Under this condition, an oil passage is formed between P port (from pump) and T port (to transmission case) in the control valve, and all oil from the hydraulic pump flows to T port.
  • Page 507 L3301, L3901, L4701, WSM STEERING Left Turn The steering system operates in the same way at a left-turn as well, except that oil flows into and out of steering cylinder in the directions opposite to those at a right-turn. (1) Steering Wheel...

  • Page 508: Steering Cylinder

    L3301, L3901, L4701, WSM STEERING [5] STEERING CYLINDER (1) Tie-rod (3) Head Cover (5) Head Cover (7) Internal Snap Ring (2) Piston Rod (4) Cylinder Tube (6) Front Axle Case The steering cylinder is a single piston both rod double-acting type. This steering cylinder is installed parallel to the front axle and connected to tie-rods.
  • Page 509 [1] L3301/L3901..........................7-S1 [2] L4701.............................7-S2 2. SERVICING SPECIFICATIONS ....................7-S3 3. TIGHTENING TORQUES......................7-S5 4. CHECKING AND ADJUSTING....................7-S6 [1] STEERING WHEEL PLAY (L3301/L3901) ................7-S6 [2] HYDRAULIC PUMP TEST USING FLOW-METER (POWER STEERING) ......7-S6 [3] RELIEF VALVE ........................7-S9 (1) L3301/L3901........................7-S9 (2) L4701..........................7-S10 [4] BLEEDING ..........................7-S10 5.
  • Page 510 L3301, L3901, L4701, WSM STEERING 1. TROUBLESHOOTING [1] L3301/L3901 Reference Symptom Probable Cause Solution Page Excessive Steering Improper wheel play adjustment Adjust 7-S6 Wheel Play Backlash between sector gear shaft and rack Adjust 7-S21 (piston) too large Steering linkage worn Replace –...
  • Page 511 L3301, L3901, L4701, WSM STEERING [2] L4701 Reference Symptom Probable Cause Solution Page Tractor Can Not Be Steering controller broken Replace 7-S19 Steered Pipe broken Replace 7-S19 Front Wheels Improper toe-in adjustment Adjust G-63 Vibration Air in the hydraulic system...

  • Page 512: Servicing Specifications

    L3301, L3901, L4701, WSM STEERING 2. SERVICING SPECIFICATIONS STEERING WHEEL PLAY Item Factory Specification Allowable Limit Steering Wheel [L3301/L3901] Play 20 to 50 mm – 0.79 to 1.9 in. POWER STEERING Item Factory Specification Allowable Limit Hydraulic Pump [L3301/L3901] Delivery at Above –...
  • Page 513 L3301, L3901, L4701, WSM STEERING HYDRAULIC PUMP Item Factory Specification Allowable Limit Housing Bore Depth of scratch 0.09 mm – 0.0035 in. Bushing to Gear Shaft Clearance 0.020 to 0.081 mm 0.15 mm 0.0008 to 0.0032 in. 0.0059 in. • Gear shaft O.D.
  • Page 514 L3301, L3901, L4701, WSM STEERING 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) [L3301/L3901] Item N·m kgf·m...

  • Page 515: Checking And Adjusting

    L3301, L3901, L4701, WSM STEERING 4. CHECKING AND ADJUSTING [1] STEERING WHEEL PLAY (L3301/L3901) Steering Wheel Play 1. Turn the front wheels straight ahead. 2. Rotate the steering wheel lightly by hand, and measure the play (A). 3. If the play (A) is not within the factory specifications, turn the adjusting screw (1) to adjust.
  • Page 516 L3301, L3901, L4701, WSM STEERING Hydraulic Flow Test IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with that flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.
  • Page 517 L3301, L3901, L4701, WSM STEERING (Continued) [L3301/L3901] Above Hydraulic pump delivery 14.4 L/min. Factory specification at no pressure 3.80 U.S.gals/min. 3.17 Imp.gals/min. Above 14.1 L/min. Factory specification 3.72 U.S.gals/min. Hydraulic pump delivery 3.10 U.S.gals/min. at rated pressure 11.9 L/min. Allowable limit 3.14 U.S.gals/min.

  • Page 518: Relief Valve

    L3301, L3901, L4701, WSM STEERING [3] RELIEF VALVE (1) L3301/L3901 Relief Valve Setting Pressure 1. Disconnect the power steering delivery pipe joint bolt. 2. Install the adaptor E instead of joint bolt, and then set a thread joint, cable and pressure gauge.

  • Page 519: L4701

    L3301, L3901, L4701, WSM STEERING (2) L4701 Relief Valve Setting Pressure 1. Disconnect the power steering delivery pipe joint bolt. 2. Install the adaptor E instead of joint bolt, and then set a thread joint, cable and pressure gauge. 3. Start the engine and set the engine speed at max. speed.

  • Page 520: Disassemling And Assembling

    L3301, L3901, L4701, WSM STEERING 5. DISASSEMLING AND ASSEMBLING [1] L3301/L3901 (1) Hydraulic Pump Hydraulic Pump Assembly 1. Remove the side cover (5). 2. Remove the steering joint shaft (1). 3. Disconnect the suction hose (3). 4. Disconnect the return hose (8).
  • Page 521 L3301, L3901, L4701, WSM STEERING Reserve Tank, Battery and Front Support 1. Remove battery negative cable (1). 2. Disconnect battery plus connector (2). 3. Remove battery stay (3). 4. Remove battery (4). 5. Remove air cleaner assembly (5). 6. Remove slow blow fuse boxes (6).
  • Page 522 L3301, L3901, L4701, WSM STEERING Steering Gear Box Assembly 1. Remove the bolts (1). 2. Remove the steering gear box (2). (When reassembling) 78 to 90 N·m Steering gear box mounting Tightening torque 7.9 to 9.2 kgf·m bolt 58 to 66 lbf·ft...

  • Page 523: Disassembling Steering Gear Box

    L3301, L3901, L4701, WSM STEERING (3) Disassembling Steering Gear Box Pitman Arm 1. Turn the input shaft clockwise and counterclockwise several time to drain oil from gear box. 2. Secure the power steering gear box with a vise. 3. Remove the nut and spring washer.
  • Page 524 L3301, L3901, L4701, WSM STEERING Valve Assembly 1. Remove the valve housing mounting screws. 2. Remove the valve assembly (1) and ball nut (2). (When reassembling) • Apply oil to O-ring and oil seal. 48 to 55 N·m Valve housing mounting Tightening torque 4.9 to 5.7 kgf·m...

  • Page 525: L4701

    L3301, L3901, L4701, WSM STEERING [2] L4701 (1) Hydraulic Pump [A] Manual Transmission Model Preparation 1. Remove the side cover (R.H.). 2. Disconnect the delivery pipe (PTO) (5), power steering delivery hose (4) and power steering return hose (3) from the regulator valve (2).
  • Page 526 L3301, L3901, L4701, WSM STEERING [B] HST Model Hydraulic Pump Assembly 1. Remove the side cover. 2. Disconnect the suction hose (1). 3. Disconnect the power steering return hose (2). 4. Disconnect the delivery pipe (3-point hitch) (3). 5. Disconnect the power steering delivery hose (4).

  • Page 527: Steering Controller

    L3301, L3901, L4701, WSM STEERING (2) Steering Controller Battery Negative Cable Terminal 1. Open the bonnet. 2. Disconnect the battery negative cable terminal connector (1). (1) Battery Negative Terminal Connector 9Y1211012STS0035US0 Steering Wheel and Rear Bonnet 1. Remove steering wheel cap (1).
  • Page 528 L3301, L3901, L4701, WSM STEERING Power Steering Controller Hoses 1. Mark the hoses to identify which port the hoses are connected shown in figure. 2. Remove the hoses. (When reassembling) • Be sure to connect the both delivery hoses to original position.

  • Page 529: Servicing

    L3301, L3901, L4701, WSM STEERING 6. SERVICING [1] L3301/L3901 (1) Hydraulic Pump Housing Bore (Depth of Scratch) 1. Check for the scratch on the interior surface of the housing caused by the gear. 2. If the scratch reaches more than half the area of the interior surface of the housing, replace at pump assembly.

  • Page 530: Steering Gear Box

    L3301, L3901, L4701, WSM STEERING (2) Steering Gear Box Backlash between Sector Gear and Ball Nut 1. Set a dial indicator with its finger on the pitman arm. 2. Move the pitman arm lightly, and measure the pitman arm deflection.

  • Page 531: L4701

    L3301, L3901, L4701, WSM STEERING [2] L4701 (1) Hydraulic Pump Housing Bore (Depth of Scratch) 1. Check for the scratch on the interior surface of the housing caused by the gear. 2. If the scratch reaches more than half the area of the interior surface of the housing, replace at pump assembly.

  • Page 532: Hydraulic System

    HYDRAULIC SYSTEM KiSC issued 09, 2016 A...
  • Page 533 MECHANISM CONTENTS 1. STRUCTURE..........................8-M1 [1] L3301/L3901......................... 8-M1 [2] L4701............................ 8-M2 (1) Manual Transmission Model................... 8-M2 (2) HST Model........................8-M3 2. HYDRAULIC CIRCUIT ....................... 8-M4 [1] L3301/L3901......................... 8-M4 (1) Manual Transmission Model................... 8-M4 (2) HST Model........................8-M5 [2] L4701............................ 8-M6 (1) Manual Transmission Model...................

  • Page 534: Structure

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 1. STRUCTURE [1] L3301/L3901 (1) Hydraulic Block (2) Power Steering Controller (3) Hydraulic Pump (4) Front Hydraulic Block (5) Hydraulic Oil Filter HST Model 8-M1 KiSC issued 09, 2016 A...
  • Page 535 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [2] L4701 (1) Manual Transmission Model (1) Hydraulic Block (3) Regulator Valve (5) Power Steering Controller (6) Front Hydraulic Block (7) Hydraulic Oil Filter (8) PTO Clutch Valve (2) Power Steering Cylinder (4) Hydraulic Pump...
  • Page 536 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) HST Model (1) Hydraulic Block (3) Power Steering Cylinder (5) Hydraulic Pump (7) Front Hydraulic Block (8) Hydraulic Oil Filter (9) PTO Clutch Valve (2) Hydraulic Oil Filter (HST) (4) Oil Cooler (6) Power Steering Controller...

  • Page 537: L3301/L3901

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 2. HYDRAULIC CIRCUIT [1] L3301/L3901 (1) Manual Transmission Model (1) Oil Tank (Transmission Case) (4) Hydraulic Pump (6) Front Hydraulic Block (10) Relief Valve (Power Steering) (2) Hydraulic Oil Filter (Three Point Hitch) (7) Position Control Valve...
  • Page 538 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) HST Model (1) Oil Tank (Transmission Case) (5) Hydraulic Pump (9) Power Steering Controller (13) Relief Valve (Power Steering) (2) Hydraulic Oil Filter (Power Steering) (10) Hydraulic Oil Filter (HST) (14) Relief Valve...

  • Page 539: Manual Transmission Model

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [2] L4701 (1) Manual Transmission Model (1) Oil Tank (Transmission Case) (5) Hydraulic Pump (9) Regulator Valve (13) Relief Valve (2) Hydraulic Oil Filter (Power Steering) (10) PTO Clutch Valve (Three Point Hitch) (3) Engine...

  • Page 540: Hst Model

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) HST Model (1) Oil Tank (Transmission Case) (5) Hydraulic Pump (8) Hydraulic Cylinder (12) Relief Valve (Power Steering) (2) Hydraulic Oil Filter (Power Steering) (9) HST Unit (13) Relief Valve (3) Engine (6) Front Hydraulic Block...

  • Page 541: Three Point Hitch Hydraulic System

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 3. THREE POINT HITCH HYDRAULIC SYSTEM [1] THREE POINT HITCH HYDRAULIC CIRCUIT Hydraulic Oil Flow (1) Oil Tank (Transmission Case) (2) Hydraulic Oil Filter (3) Hydraulic Pump (4) Relief Valve (5) Position Control Valve...

  • Page 542: Hydraulic Cylinder

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [2] HYDRAULIC CYLINDER (1) Lowering Speed Adjusting (4) Hydraulic Cylinder (8) Hydraulic Rod (12) Position Control Arm Knob (5) O-ring (9) Hydraulic Arm (13) Spool Drive Lever (2) Lowering Speed Adjusting (6) Back-up Ring...

  • Page 543: Linkage Mechanism

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [3] LINKAGE MECHANISM (1) Position Control Lever (2) Control Arm (3) Spool Drive Lever (4) Spool Joint 1 (5) Spool Head (6) Position Control Valve (7) Feedback Lever Shaft (8) Feedback Lever (9) Feedback Rod...
  • Page 544 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM Lowering 1. When the position control lever is moved to the Lowering position, the control arm (2) rotates to the arrow. Therefore, the spool drive lever (1) moves around the fulcrum P and push the spool (3) and poppet 2 (4) opening the Lowering circuit.

  • Page 545: Position Control Valve

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [4] POSITION CONTROL VALVE  Neutral Pressurized oil delivered from the P port, pushes the unload poppet (2) and returns to the transmission case from T port. Since the poppet 1 (3) is closed by the spring located behind the poppet 1 (3), the oil in the hydraulic cylinder is not drained to the transmission case.
  • Page 546 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM  Lowering When the control lever is moved to "DOWN" position, the spool (1) is pushed into the position control valve body as shown in the figure. Since the spool (1) blocks the oil entering to A...

  • Page 547: Hydraulic Pump

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [5] HYDRAULIC PUMP The gear type hydraulic pump is adopted for these models. This pump is called as tandem type and composed two pair of gears, side plates, bushings and other components as shown in the figure.

  • Page 548: Front Hydraulic Block

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 4. FRONT HYDRAULIC BLOCK [1] STRUCTURE (1) Cap To Implement Control Valve To Position Control Valve : To Transmission Case (2) Front Hydraulic Block From Implement Control From Hydraulic Pump : From Implement Control...

  • Page 549: Relief Valve

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [3] RELIEF VALVE The 3-point hydraulic circuit has a relief valve to restrict the maximum pressure in its circuit. This is a guide piston relief valve with damper, a direct acting relief valve suitable for relatively high...
  • Page 550 [3] RELIEF VALVE ........................8-S11 (1) Three Point Hitch Hydraulic System................8-S11 (2) Power Steering System ....................8-S12 [4] SAFETY VALVE ........................8-S14 [5] POSITION CONTROL ROD ....................8-S15 (1) L3301/L3901........................8-S15 (2) L4701..........................8-S16 5. DISASSEMBLING AND ASSEMBLING ..................8-S17 [1] HYDRAULIC PUMP ......................8-S17 (1) L3301/L3901........................8-S17 (2) L4701..........................8-S18 [2] HYDRAULIC CYLINDER.....................8-S20...
  • Page 551 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Implement Does Not Control linkage improperly adjusted Adjust 8-S15, Rise (Not Noise) 8-S16 Control linkage improperly assembled or Repair or replace 8-S24 damaged Position control valve malfunctioning (unload...

  • Page 552: Servicing Specifications

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 2. SERVICING SPECIFICATIONS POWER STEERING Item Factory Specification Allowable Limit Hydraulic Pump [L3301/L3901] Delivery at Above – Condition No Pressure 16.1 L/min. • Engine Speed: 4.25 U.S.gals/min. approx. 2700 min (rpm) 3.54 Imp.gals/min. • Rated Pressure: 11.1 to 12.0 MPa...
  • Page 553 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM THREE POINT HITCH HYDRAULIC SYSTEM) Item Factory Specification Allowable Limit Hydraulic Pump [L3301/L3901] Delivery at Above – Condition No Pressure 23.7 L/min. • Engine Speed: 6.26 U.S.gals/min. approx. 2700 min (rpm) 5.21 Imp.gals/min. • Rated Speed: 15.7 to 16.1 MPa...
  • Page 554 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM HYDRAULIC CYLINDER Item Factory Specification Allowable Limit Bushings Press-fit Location (Right Side) 11.3 to 11.7 mm – 0.445 to 0.460 in. (Left Side) 16.8 to 17.2 mm – 0.662 to 0.677 in. Cylinder Bore [L3301/L3901] I.D.
  • Page 555 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) Item N·m kgf·m...

  • Page 556: Checking And Adjusting

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 4. CHECKING AND ADJUSTING [1] HYDRAULIC PUMP (POWER STEERING) (1) Test Using Flow-meter Preparation (L3301/L3901 Only) 1. Remove the bolt (2), (4). 2. Remove the joint shaft (1). (When reassembling) • Lift the joint shaft (1) so that there should be a clearance (A) of more than 5 mm (0.2 in.) between the joint shaft (1) and flywheel...
  • Page 557 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM Hydraulic Flow Test IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with that flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.

  • Page 558: Hydraulic Pump (Three Point Hitch Hydraulic System)

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (Continued) [L3301/L3901] Above Hydraulic pump delivery 14.4 L/min. Factory specification at no pressure 3.80 U.S.gals/min. 3.17 Imp.gals/min. Above 14.1 L/min. Factory specification 3.72 U.S.gals/min. Hydraulic pump delivery 3.10 U.S.gals/min. at rated pressure 11.9 L/min.
  • Page 559 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM Hydraulic Flow Test IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with that flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.
  • Page 560 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (Continued) [L3301/L3901] Above Hydraulic pump delivery 23.7 L/min. Factory specification at no pressure 6.26 U.S.gals/min. 5.21 Imp.gals/min. Above 23.2 L/min. Factory specification 6.13 U.S.gals/min. Hydraulic pump delivery 5.10 Imp.gals/min. at rated pressure 19.5 L/min.

  • Page 561: Relief Valve

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [3] RELIEF VALVE (1) Three Point Hitch Hydraulic System Relief Valve Setting Pressure IMPORTANT • When removing the plug from hydraulic cylinder, be sure to lower the three point hitch. 1. Remove the plug from hydraulic cylinder.

  • Page 562: Power Steering System

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) Power Steering System [A] L3301/L3901 Relief Valve Setting Pressure 1. Disconnect the power steering delivery pipe joint bolt. 2. Install the adaptor E instead of joint bolt, and then set a thread joint, cable and pressure gauge.
  • Page 563 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [B] L4701 Relief Valve Setting Pressure 1. Disconnect the power steering delivery pipe joint bolt. 2. Install the adaptor E instead of joint bolt, and then set a thread joint, cable and pressure gauge.

  • Page 564: Safety Valve

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [4] SAFETY VALVE Safety Valve Setting Pressure Test Using Injection Nozzle Tester 1. Remove the safety valve assembly (1). 2. Attach the safety valve to an injection nozzle tester with a safety valve setting adaptor. (Refer to "SPECIAL TOOLS" (see page G-94.).)

  • Page 565: Position Control Rod

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [5] POSITION CONTROL ROD (1) L3301/L3901 Feedback Rod Adjustment 1. Set the position control lever (1) to the lowest position. 2. Start the engine, and set the engine revolution to idling. 3. Move the position control lever (1) to uppermost position.

  • Page 566: L4701

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) L4701 Feedback Rod Adjustment 1. Set the position control lever (1) to the lowest position. 2. Start the engine, and set the engine revolution to idling. 3. Move the position control lever (1) to uppermost position.

  • Page 567: Disassembling And Assembling

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 5. DISASSEMBLING AND ASSEMBLING [1] HYDRAULIC PUMP (1) L3301/L3901 Hydraulic Pump Assembly 1. Remove the side cover (5). 2. Remove the steering joint shaft (1). 3. Disconnect the suction hose (3). 4. Disconnect the return hose (8).

  • Page 568: L4701

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (2) L4701 [A] Manual Transmission Model Preparation 1. Remove the side cover (R.H.). 2. Disconnect the delivery pipe (PTO) (5), power steering delivery hose (4) and power steering return hose (3) from the regulator valve (2).
  • Page 569 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [B] HST Model Hydraulic Pump Assembly 1. Remove the side cover. 2. Disconnect the suction hose (1). 3. Disconnect the power steering return hose (2). 4. Disconnect the delivery pipe (3-point hitch) (3). 5. Disconnect the power steering delivery hose (4).

  • Page 570: Hydraulic Cylinder

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [2] HYDRAULIC CYLINDER Battery Negative Cable 1. Open the bonnet. 2. Remove the battery negative cable (1). (1) Battery Negative Cable 9Y1211012HYS0009US0 Lift Rod 1. Remove the top link (1). 2. Remove the rubber spring (2).
  • Page 571 58 to 66 lbf·ft (1) Hydraulic Cylinder Assembly 9Y1211012HYS0013US0 Lowering Speed Adjusting Valve (L3301/L3901) 1. Remove the lowering speed adjusting valve from hydraulic cylinder block. 2. Tap out the spring pin (8), and remove the grip (5).
  • Page 572 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM Hydraulic Rod and Hydraulic Piston 1. Tap out the spring pin. 2. Remove the hydraulic rod. 3. Remove the plug (screw head size: 17 mm) from front of hydraulic cylinder. 4. Inject the compressed air through the plug hole, and remove the hydraulic piston.
  • Page 573 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM Bushings 1. Remove the bushings (3) and (4). (When reassembling) • When press-fitting new bushings (3), (4) with a press-fitting tool (see page G-91) observe the dimensions described in the figure. • Apply transmission fluid to the hydraulic cylinder boss and bushing.
  • Page 574 L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [3] POSITION CONTROL VALVE Position Control Valve 1. Loosen and remove the position control valve mounting screws. 2. Remove the position control valve (1). (When reassembling) • Be careful not to damage the O-rings.

  • Page 575: Relief Valve

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM (Continued) IMPORTANT • Set screw (3) and spool joint 1 (28) are adjusted to very close accuracy. Do not disassemble them unless necessary. If disassembled due to unavoidable reasons, be sure to make the following adjustments before assembling.

  • Page 576: Servicing

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM 6. SERVICING [1] HYDRAULIC PUMP Housing Bore (Depth of Scratch) 1. Check for the scratch on the interior surface of the housing caused by the gear. 2. If the scratch reaches more than half the area of the interior surface of the housing, replace at pump assembly.

  • Page 577: Hydraulic Cylinder

    L3301, L3901, L4701, WSM HYDRAULIC SYSTEM [2] HYDRAULIC CYLINDER Hydraulic Cylinder Bore 1. Check the cylinder internal surface for scoring or damage. 2. Measure the cylinder I.D. with a cylinder gauge. 3. If the measurement exceeds the allowable limit, replace the hydraulic cylinder block.

  • Page 578: Electrical System

    ELECTRICAL SYSTEM KiSC issued 09, 2016 A...
  • Page 579 MECHANISM CONTENTS 1. ELECTRICAL CIRCUIT ......................9-M1 [1] L3301/L3901......................... 9-M1 [2] L4701............................ 9-M2 2. INSTRUMENT PANEL ....................... 9-M3 [1] SYSTEM OUTLINE ......................9-M3 [2] CONSTRUCTION AND FUNCTION OF COMPONENTS............ 9-M3 (1) Instrument Panel ......................9-M3 (2) Electric Control Unit (ECU)..................... 9-M3 (3) Switches .........................

  • Page 580: Electrical Circuit

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 1. ELECTRICAL CIRCUIT [1] L3301/L3901 9-M1 KiSC issued 09, 2016 A...

  • Page 581: L4701

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [2] L4701 9-M2 KiSC issued 09, 2016 A...

  • Page 582: Instrument Panel

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 2. INSTRUMENT PANEL [1] SYSTEM OUTLINE Instrument panel uses CAN (Controller Area Network) communication with main ECU (Electronic Control Unit) and engine ECU to share information from various sensors and switches. Mainly Instrument panel acts as an indicator to inform various information such as engine speed, warning lamp and so on.

  • Page 583: Switches

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Engine Electric Control Unit (ECU) The ECU (1) function to operate in accordance with information coming from various sensors. It has the role of controlling all the components while sharing sensor information necessary for control and control information with the electronic instrument panel.
  • Page 584 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM PTO Switch (L3301/L3901 Only) PTO switch (1) is attached to detect the position of PTO gear shift lever. This switch also has a function as a safety switch. If this switch is in OFF position, starter motor does not rotate.
  • Page 585 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Parked Regeneration Switch Press the parked regeneration switch (1) under the specified condition, and the parked regeneration starts. When specified amount of PM (Particulate Matter) has built up in the DPF, it is possible to do the parked regeneration.
  • Page 586 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Seat Switch This switch is attached under the seat. When sitting the seat, the seat switch (1) is pushed in, and electrical circuit is closed. When the seat is vacant, this switch is not pushed and electrical circuit is opened. This switch is adopted to achieve OPC (operator presence control) function.

  • Page 587: Sensors

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (4) Sensors Fuel Level Sensor This sensor (1) is designed to detect the fuel level in the fuel tank. It detects the position of the float that moves according to the quantity of fuel through the variation in resistance of the variable resistor in order to indicate the fuel level on the electronic instrument panel.
  • Page 588 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Flusher Unit Flusher unit controls the blinking frequency of turn signal and hazard signal. As a only one side of lamp blinking of turn signal and both right and left side lamps blinking hazard signal.

  • Page 589: Basic Control System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [3] BASIC CONTROL SYSTEM (1) Indication Items of Meter Panel (1) Electrical Charge Warning (4) Parking Brake Warning (7) Regeneration Indicator (10) Engine Warning Indicator Indicator Indicator (8) Engine RPM Increase (11) Emission Indicator...

  • Page 590: Easy Checker

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (2) Easy Checker™ If the indicators in the Easy Checker™ come on during operation, immediately stop the engine, and find the cause as shown below. Never operate the tractor while Easy Checker™ lamp is on.
  • Page 591 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [4] ASSISTANT CONTROL SYSTEM (1) Self-diagnosis Function When the instrumental panel detects something wrong, the master system warning indicator (1) starts blinking and the error code indicating the location of the trouble. showed in below is displayed on the liquid crystal display.

  • Page 592: Engine Starting System And Stopping

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 3. ENGINE STARTING SYSTEM AND STOPPING [1] STARTING CIRCUIT (1) Battery (7) PTO Switch (12) Injectors (18) Air Flow Sensor (2) Slow Blow Fuse (8) Shuttle Switch / HST Pedal (13) Glow Plug (19) Crank Shaft Sensor...

  • Page 593: Related Parts

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [2] RELATED PARTS Main Electric Control Unit (ECU) The ECU (1) functions to operate in accordance with information coming from various sensors. It has the role of controlling all the components while sharing sensor information necessary for control and control information with the electronic instrument panel.
  • Page 594 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM PTO Switch (L4701 Only) PTO switch (1) is attached to choose PTO on/off. By using signal from this switch, main ECU decide to send oil to PTO clutch or not. This switch also has a function as a safety switch.

  • Page 595: Engine Starting Conditions

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [3] ENGINE STARTING CONDITIONS When the following conditions become complete, the engine can be started by turning key switch to START position. (1) Shuttle Shift Lever [A] L3301/L3901 Manual (2) PTO Gear Shift Lever...

  • Page 596: Operator Presence Control (Opc)

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [4] OPERATOR PRESENCE CONTROL (OPC) This tractor is equipped with Operator Presence Control (OPC) system. The engine stops automatically when the operator stands from the seat while engaging PTO, depressing speed control pedal or engaging shuttle lever.

  • Page 597: Can (Controller Area Network)

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 4. CAN (CONTROLLER AREA NETWORK) The Controller Area Network (CAN) specification defines the Data Link Layer, ISO 11898 defines the Physical Layer. The CAN bus [CAN bus] is a Balanced (differential) 2-wire interface running over a Shielded Twisted Pair (STP), WIRING HARNESS (4) and (5).
  • Page 598 (1) Key Switch........................9-S26 (2) Safety Switches ......................9-S27 (3) Starter..........................9-S29 (4) Relays..........................9-S30 (5) Glow Control System.....................9-S31 [8] OPC (OPERATOR PRESENCE CONTROL) SYSTEM ............9-S32 (1) L3301/L3901........................9-S32 (2) L4701..........................9-S33 (3) Safety Switch.........................9-S34 [9] CHARGING SYSTEM ......................9-S35 [10]LIGHTING SYSTEM ......................9-S36 (1) Combination Light Switch ....................9-S36 (2) Flasher Unit ........................9-S38...
  • Page 599 (13)DPF INHIBIT Switch ......................9-S53 (14)Acceleration Sensor ......................9-S54 [15]CCV HEATER........................9-S55 (1) CCV Relay ........................9-S55 (2) CCV Heater ........................9-S55 5. DISASSEMBLING AND ASSEMBLING..................9-S56 [1] STARTER ..........................9-S56 [2] ALTERNATOR........................9-S57 6. SERVICING ..........................9-S59 [1] STARTER ..........................9-S59 [2] ALTERNATOR........................9-S61 KiSC issued 09, 2016 A...
  • Page 600 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page All Electrical Battery discharged or damaged Recharge or replace 9-S11 Equipment Do Not Battery positive cable disconnected or improperly Repair or replace 9-S10 Operate connected Battery negative cable disconnected or...
  • Page 601 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM CHARGING SYSTEM Reference Symptom Probable Cause Solution Page Charging Lamp Does Fuse blown Replace 9-S16 Not Light when Main Wiring harness disconnected or improperly Repair or replace – Switch Is Turned ON connected Alternator damaged...
  • Page 602 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM EASY CHECKER™ Reference Symptom Probable Cause Solution Page Engine Oil Pressure Engine oil pressure too low Repair engine 1-S80 Lamp Lights Up Engine oil insufficient Fill G-36, G-64 When Engine Is Engine oil pressure switch damaged...
  • Page 603 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Error Display (TRACTOR) Display Reference Trouble Item Probable Cause Solution on LCD Page Check the – • CANbus wiring is disconnected or communication line short-circuited E-20 Communication • No signals from main ECU Check the main ECU 9-S22 •...
  • Page 604 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Error Display (Engine) J1939-73 14229 Name Reference Page P-Code P0016 NE-G phase shift P0072 Intake air temperature built-in MAF sensor abnormality P0073 P0087 Pressure limiter emergency open P0088 High rail pressure P0089 1347 SCV (MPROP) stuck...
  • Page 605 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM J1939-73 14229 Name Reference Page P-Code P0546 4765 Exhaust gas temperature sensor 0 (T0) abnormality P0547 4765 P0562 Battery voltage abnormality P0563 P0602 523538 QR (IQA) data abnormality P0602 523538 P0605 P0606 1077 ECU FLASH ROM and CPU abnormality...
  • Page 606 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM J1939-73 14229 Name Reference Page P-Code P242C 3246 Exhaust gas temperature sensor 2 (T2) abnormality P242D 3246 P2454 3251 Differential pressure sensor 1 abnormality P2455 3251 P2621 523582 Intake throttle lift sensor abnormality P2622...

  • Page 607: Servicing Specifications

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Glow Plug Resistance Approx. – 0.9 Ω Fuel Level Sensor 1.0 to 5.0 Ω • Float at Upper-most Position Resistance – 32.5 Ω • Float at Middle Position Resistance –...
  • Page 608 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-13.) Item N·m kgf·m...

  • Page 609: Checking And Adjusting

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 4. CHECKING AND ADJUSTING CAUTION • To avoid accidental short circuit, be sure to attach the positive cable to the positive terminal before the negative cable is attached to the negative terminal. • Never remove the battery cap while the engine is running.
  • Page 610 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Recharging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.

  • Page 611: Testing, Setting And Adjusting By Electronic Instrument Panel

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [2] TESTING, SETTING AND ADJUSTING BY ELECTRONIC INSTRUMENT PANEL The following setting, adjustments and testing can be done by using the electronic instrumental panel. • Testing: Check a voltage from various sensors or rotation of engine.
  • Page 612 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (2) Mode "A" (Test Mode) 1. While holding down both DPF INHIBIT switch (2) and parked regeneration switch (3), turn key switch to "ON" or "START" position. 2. Mode selection display is indicated on the LCD (4).
  • Page 613 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (4) Mode "c" (Acceleration Sensor fine-adjustment Mode) 1. While holding down both DPF INHIBIT switch (2) and parked regeneration switch (3), turn key switch to "ON" or "START" position. 2. Mode selection display is indicated on the LCD (4).
  • Page 614 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (5) Mode "d" (Tractor Model Select Mode) 1. While holding down both DPF INHIBIT switch (2) and parked regeneration switch (3), turn key switch to "ON" or "START" position. 2. Mode selection display is indicated on the LCD (4).

  • Page 615: Fuses And Ground Cable

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [3] FUSES AND GROUND CABLE (1) Checking Fuse and Connector Checking Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system.
  • Page 616 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Checking Slow-Blow Fuses 1. The slow-blow fuses are intended to protect the electrical cabling. If any of them has blown out, be sure to pinpoint the cause. Never use any substitute, use only a KUBOTA genuine part.

  • Page 617: Electronic Instrument Panel

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [4] ELECTRONIC INSTRUMENT PANEL Battery Negative Cable Terminal 1. Open the bonnet. 2. Disconnect the battery negative cable terminal connector (1). (1) Battery Negative Terminal Connector 9Y1211012STS0035US0 Steering Wheel and Rear Bonnet 1. Remove steering wheel cap (1).

  • Page 618: Checking Electronic Instrument Panel Connector

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (1) Checking Electronic Instrument Panel Connector Connector of Wire Harness Side Color of Color of Terminal Name Terminal Name wiring wiring Engine Oil Pressure Switch Buzzer Alternator L Terminal Head Light (Meter Panel Back Light)
  • Page 619 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Checking Instrument Panel Connector 1. Disconnect the connector (1) and check their terminals for contamination and deformation. 2. Check to see that cable does not broken or terminals are not shelled off. 3. If any damaged parts are found, repair or replace them.

  • Page 620: Main Electric Control Unit (Main Ecu)

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [5] MAIN ELECTRIC CONTROL UNIT (MAIN ECU) Battery Negative Cable Terminal 1. Open the bonnet. 2. Disconnect the battery negative cable terminal connector (1). (1) Battery Negative Terminal Connector 9Y1211012STS0035US0 Steering Wheel and Rear Bonnet 1.
  • Page 621 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (1) Checking Main Electrical Control Unit Connector Connector of Wire Harness Side Color of Color of Terminal Name Terminal Name wiring wiring R/BR Key Switch DPF Regeneration Switch DPF INHIBIT Switch Parking Brake Sensor...

  • Page 622: Engine Electric Control Unit (Engine Ecu)

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [6] ENGINE ELECTRIC CONTROL UNIT (ENGINE ECU) Battery Negative Cable Terminal 1. Open the bonnet. 2. Disconnect the battery negative cable terminal connector (1). (1) Battery Negative Terminal Connector 9Y1211012STS0035US0 Steering Wheel and Rear Bonnet 1.

  • Page 623: Checking Electric Control Unit Connector

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (1) Checking Electric Control Unit Connector Color of Color of Terminal Name Terminal Name wiring wiring – – – – Injector #1 and #4 (+) Engine ECU Main Relay (Coil Side) Engine ECU Main Relay (Switch Side) Injector #2 (−)
  • Page 624 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Color of Color of Terminal Name Terminal Name wiring wiring Intake Throttle Valve Motor (DC Motor −) DPF Differential Pressure Sensor (Signal) Crankshaft Position Sensor (+) Intake Air Temperature Sensor (Signal) – – –...

  • Page 625: Starting System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [7] STARTING SYSTEM (1) Key Switch Key Switch 1. Remove the steering wheel and rear bonnet. 2. Disconnect connector of key switch (1). 3. Performer following checking. (1) Key Switch 9Y1211012ELS0027US0 Connector Voltage 1. Measure the voltage across the connector B terminal and chassis.

  • Page 626: Safety Switches

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (2) Safety Switches [A] Shuttle Switch (Manual Transmission Model) Shuttle Switch (Manual Transmission Model) 1. Remove connector of shuttle switch (1). 2. Measure the resistance across two terminals of the connector. 3. If measurement is different from following table, replace it.
  • Page 627 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [C] PTO Switch PTO Switch (L3301/L3901) 1. Remove connector of PTO switch (1). 2. Measure the resistance across two terminals of the connector. 3. If measurement is different from following table, replace it. 0 Ω...

  • Page 628: Starter

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (3) Starter Starter Motor B Terminal Voltage 1. Measure the voltage across the B terminal and chassis. 2. If the voltage differs from the battery voltage, check battery cable or battery ground cable. Voltage Factory specification Approx.

  • Page 629: Relays

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (4) Relays Starter Relay and Engine Relay 1. Remove relays (1), (2). Relay Terminal Color of Wiring Starter Relay Engine Relay NOTE • Starter relay and engine relay are using same relay. When checking, be sure to check the color of wiring harness.

  • Page 630: Glow Control System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (5) Glow Control System Glow Plug Lead Terminal Voltage 1. Disconnect the wiring lead (1) from the glow plug (2) after turning the main switch off. 2. Turn the main switch key to the "ON" position, and measure the voltage between the lead terminal and the chassis.

  • Page 631: Opc (Operator Presence Control) System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [8] OPC (OPERATOR PRESENCE CONTROL) SYSTEM (1) L3301/L3901 <Manual Transmission Model>  Preparation before checking 1. Sit on operator's seat. 2. Set the parking brake. 3. Shift the main gear shift lever and the synchro shuttle shift lever to "NEUTRAL" position.

  • Page 632: L4701

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (2) L4701 <Manual Transmission Model>  Preparation before checking 1. Sit on operator's seat. 2. Set the parking brake. 3. Shift the main gear shift lever and the synchro shuttle shift lever to "NEUTRAL" position.

  • Page 633: Safety Switch

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (3) Safety Switch [A] Seat Switch Checking Seat Switch 1. Remove the seat. 2. Disconnect the seat switch connector (3). 3. Change the sensor bar angle (1) and measure the resistance between connector terminals, referring to the table below.

  • Page 634: Charging System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [9] CHARGING SYSTEM Alternator 1. Disconnect the 2P connector (3) from alternator after turning the key switch "OFF". 2. Perform the following checkings. (1) B Terminal (3) 2P Connector (2) Alternator 9Y1211012ELS0052US0 Connector Voltage 1.

  • Page 635: Lighting System

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [10] LIGHTING SYSTEM (1) Combination Light Switch Combination Light Switch 1. Remove steering wheel and rear bonnet. 2. Disconnect connector of combination light switch (1). 3. Perform following checking. (1) Combination Light Switch 9Y1211012ELS0055US0 Connector Voltage 1.
  • Page 636 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Checking Turn Signal Function 1. Measure the resistance with an ohmmeter across B3 terminal and TR terminal, B3 terminal and TL terminal when turn signal light switch is at "OFF" position. 2. Measure the resistance with an ohmmeter across B3 terminal and TR terminal, B3 terminal and TL terminal when turn signal light switch is at "RIGHT"...

  • Page 637: Flasher Unit

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Checking Head Light Function 1. Measure the resistance with an ohmmeter across B4 terminal and T terminal, B4 terminal and 1 terminal, B4 terminal and 2 terminal when head light switch is at "OFF" position.

  • Page 638: Warning Lamp

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [11] WARNING LAMP Engine Oil Pressure Switch, Panel Board and Wiring Harness 1. Disconnect the lead (2) from the engine oil pressure switch after turning the main switch "OFF". 2. Turn the main switch "ON" and connect a jumper lead from the lead to the chassis.

  • Page 639: Monitor Lamp

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [12] MONITOR LAMP Parking Brake Switch 1. Disconnect the connector from the parking brake switch (1) after turning the main switch "OFF". 2. Measure the resistance across the two terminals of parking brake switch following table below.

  • Page 640: Gauges

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [13] GAUGES Checking Fuel Level Sensor 1. Remove fuel level sensor from fuel tank. 2. Measure the resistance with an ohmmeter across the terminal of fuel level sensor and chassis. 3. If the measurement is remarkably different from table below, the fuel level sensor is damaged.

  • Page 641: Injector

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [14] ENGINE CONTROL SYSTEM (1) Injector IMPORTANT • When replacing the engine ECU, be sure to do injector correction. (Refer to the "DIAGNOSIS MANUAL" (9Y110-02420) 9Y1211012ELS0069US0 Injector Resistance 1. Measure the resistance with an ohmmeter across the terminals shown in the table below.

  • Page 642: Scv (Suction Control Valve)

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (2) SCV (Suction Control Valve) NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the SCV resistance. 9Y1211012ELS0071US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 643: Rail Pressure Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (3) Rail Pressure Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0074US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 644: Fuel Pump

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (4) Fuel Pump NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the pump resistance. 9Y1211012ELS0076US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 645: Egr Valve

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (5) EGR Valve NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0079US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 646: Camshaft Position Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (7) Camshaft Position Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0083US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 647: Air Flow Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (8) Air Flow Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0085US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
  • Page 648 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (9) Intake Throttle Valve NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the sensor resistance. 9Y1211012ELS0087US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 649: Exhaust Temperature Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (10) Exhaust Temperature Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0090US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 650: Differential Pressure Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (11) Differential Pressure Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is damaged if the relating electric circuit is normal. 9Y1211012ELS0093US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...

  • Page 651: Parked Regeneration Switch

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (12) Parked Regeneration Switch Connector Voltage 1. Disconnect connector of parked regeneration switch (1). 2. Measure voltage with a voltmeter across the terminals shown in the table below. 3. If measurement value is different from the table, check relating electrical circuit.

  • Page 652: Dpf Inhibit Switch

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (13) DPF INHIBIT Switch Connector Voltage 1. Disconnect connector of DPF INHIBIT switch (1). 2. Measure voltage with a voltmeter across the terminals shown in the table below. 3. If measurement value is different from the table, check relating electrical circuit.

  • Page 653: Acceleration Sensor

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM (14) Acceleration Sensor Acceleration Sensor 1. Disconnect connector of acceleration sensor (1). 2. Measure resistance with a ohmmeter across the terminals following table below. 3. If measurement value is different from the table, the acceleration sensor is damaged.

  • Page 654: Ccv Heater

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [15] CCV HEATER (1) CCV Relay Checking Connector Voltage 1. Measure the voltage with a voltmeter across the battery terminal and chassis as table below. 2. If the voltage differs from the battery voltage, the wiring harness or fuse is faulty.

  • Page 655: Disassembling And Assembling

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 5. DISASSEMBLING AND ASSEMBLING [1] STARTER Disassembling Motor 1. Disconnect the connecting lead (9) from the magnet switch (8). 2. Remove the screws (6), and then separate the end frame (4), yoke (2) and armature (1).

  • Page 656: Alternator

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [2] ALTERNATOR Pulley 1. Secure the hexagonal end of the pulley shaft with a double-ended ratchet wrench as shown in the figure. 2. Loosen the pulley nut with a socket wrench and remove it.
  • Page 657 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Rear End Frame 1. Remove the two nuts and two screws holding the drive end frame and the rear end frame. 2. Remove the rear end frame (1). (1) Rear End Frame WSM000001ELS0028US0 Rotor 1.

  • Page 658: Servicing

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM 6. SERVICING [1] STARTER Overrunning Clutch 1. Inspect the pinion for wear or damage. 2. If there is any problem, replace the overrunning clutch assembly. 3. Check that the pinion turns freely and smoothly in the overrunning direction and does not slip in the cranking direction.
  • Page 659 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Brush Holder 1. Check the continuity across the brush holder and the holder support with an ohmmeter. 2. If it conducts, replace the brush holder. Brush holder – Resistance Infinity Holder support WSM000001ELS0036US0 Armature Coil 1.

  • Page 660: Alternator

    L3301, L3901, L4701, WSM ELECTRICAL SYSTEM [2] ALTERNATOR Bearing 1. Check the bearing for smooth rotation. 2. If it does not rotate smoothly, replace it. WSM000001ELS0039US0 Stator 1. Measure the resistance across each lead of the stator coil with an ohmmeter.
  • Page 661 L3301, L3901, L4701, WSM ELECTRICAL SYSTEM Rectifier 1. Check the continuity across each diode of rectifier with an analog ohmmeter. Conduct the test in the (R × 1) setting. 2. The rectifier is normal if the diode in the rectifier conducts in one direction and does not conduct in the reverse direction.
  • Page 662 Editor : Farm and Industrial Machinery International Service Department Address 64, Ishizu-Kitamachi, Sakai-Ku, Sakai-City, Osaka, 590-0823, Japan Phone +81- 72-241-1129 +81- 72-245-2484 E-mail : ks_g.ksos-pub@kubota.com Printed in Japan 2016. 09, S, EI, EI, engusa Code No.9Y111-10121 2014. 02, S, EI, EI, engusa KUBOTA Corporation...

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