Page 1 WORKSHOP MANUAL TRACTOR B2301,B2601 KiSC issued 11, 2014 A...
Page 2 TO THE READER This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the B2301 and B2601. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing".  Information This section primarily contains information below. • Safety First •...
Page 3 INFORMATION KiSC issued 11, 2014 A...
Page 4: Table Of Contents
INFORMATION CONTENTS 1. SAFETY FIRST ..........................I-1 2. SAFETY DECALS .......................... I-4 3. SPECIFICATIONS.......................... I-7 4. TRAVELING SPEEDS........................I-8 5. DIMENSIONS ..........................I-9 KiSC issued 11, 2014 A...
Page 5: Safety First
INFORMATION B2301, B2601, WSM 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 6 INFORMATION B2301, B2601, WSM 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 7 INFORMATION B2301, B2601, WSM 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 8: Safety Decals
INFORMATION B2301, B2601, WSM 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 9 INFORMATION B2301, B2601, WSM 9Y1211156INI0005US0 KiSC issued 11, 2014 A...
Page 10 INFORMATION B2301, B2601, WSM 9Y1211156INI0006US0 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 11: Specifications
Rear-PTO SAE 1-3/8, 6 splines PTO / Engine 540 min (rpm) / 2768 min (rpm) speed Mid-PTO USA No.5 (KUBOTA 10-tooth) involute spline PTO / Engine 2500 min (rpm) / 2753 min (rpm) speed NOTE • * Manufacturer's estimate The company reserves the right to change the specifications without notice.
Page 12: Traveling Speeds
INFORMATION B2301, B2601, WSM 4. TRAVELING SPEEDS (At rated engine rpm) Model B2301HSD Tire size (Rear) 9.5-16 Farm / 33 × 12.5-15 Turf / 12-16.5 Industry Range gear shift km/h (mile/h) lever 0 to 5.6 (0 to 3.5) Forward Middle 0 to 8.8 (0 to 5.5)
Page 13: Dimensions
INFORMATION B2301, B2601, WSM 5. DIMENSIONS 9Y1211156INI0003US0 KiSC issued 11, 2014 A...
Page 14 GENERAL KiSC issued 11, 2014 A...
Page 15 GENERAL CONTENTS 1. TRACTOR IDENTIFICATION....................... G-1 2. GENERAL PRECAUTIONS......................G-2 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING ........G-3 [1] WIRING ..........................G-3 [2] BATTERY ..........................G-5 [3] FUSE ............................G-5 [4] CONNECTOR ........................G-5 [5] HANDLING OF CIRCUIT TESTER ..................G-6 [6] COLOR OF WIRING ......................
Page 16: Tractor Identification
GENERAL B2301, B2601, WSM 1. TRACTOR IDENTIFICATION 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 17: General Precautions
• When it is necessary to use special tools, use KUBOTA special tools. Refer to the drawings when you make special tools that you do not use frequently.
Page 18: Handling Precautions For Electrical Parts And Wiring
GENERAL B2301, B2601, WSM 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 19 GENERAL B2301, B2601, WSM • Securely insert grommet. (1) Grommet (A) Correct (B) Incorrect WSM000001GEG0066US0 • Securely clamp, being careful not to damage wiring. (1) Clamp (3) Clamp (Wind Clamp Spirally) (4) Welding Dent (2) Wire Harness WSM000001GEG0067US0 • Clamp wiring so that there is no twist, unnecessary sag, or excessive tension, except for movable part, where sag be required.
Page 20: Battery
GENERAL B2301, B2601, WSM [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 21: Handling Of Circuit Tester
GENERAL B2301, B2601, WSM • 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 22: Color Of Wiring
GENERAL B2301, B2601, WSM [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 Color code...
Page 23: Lubricants, Fuel And Coolant
Top link Multipurpose Until grease Lift rod [RH] type grease overflows NLGI-2 or Brake pedal NLGI-1 Moderate (GC-LB) Battery terminal amount NOTE • *KUBOTA UDT or SUPER UDT fluid --- KUBOTA original transmission hydraulic fluid 9Y1211156GEG0002US0 KiSC issued 11, 2014 A...
Page 24 • No.2-D is a distillate fuel of lower volatility for engine in industrial and heavy mobile service. (SAE J313 JUN87) Transmission oil • KUBOTA Super UDT-2: For an enhanced ownership experience, we highly recommend Super UDT-2 to be used instead of standard hydraulic/transmission fluid. Super UDT-2 is a proprietary KUBOTA formulation that delivers superior performance and protection in all operating conditions.
Page 25 • The oil used to lubricate the transmission is also used as hydraulic fluid. To insure proper operation of the hydraulic system and to complete lubrication of the transmission, it is important that a multi-grade transmission fluid is used in this system. We recommend the use of KUBOTA UDT or SUPER UDT fluid for optimum protection and performance.
Page 26: Tightening Torques
GENERAL B2301, B2601, WSM 5. TIGHTENING TORQUES Tighten screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual according to the table below. WSM000001GEG0116US0 [1] GENERAL USE SCREWS, BOLTS AND NUTS Indication on top of bolt...
Page 27: Metric Screws, Bolts And Nuts
GENERAL B2301, B2601, WSM [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 22 to 25 48 to 55 4.9 to 5.7...
Page 28: Maintenance Check List
GENERAL B2301, B2601, WSM 6. MAINTENANCE CHECK LIST Indication on hour meter Refer- Item Interval ence 50 100 150 200 250 300 350 400 450 500 550 600 650 700 800 page every 1 Engine oil Change G-26  ...
Page 29 • The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction.
Page 30: Check And Maintenance
GENERAL B2301, B2601, WSM 7. CHECK AND MAINTENANCE [1] DAILY CHECK WARNING To avoid personal injury or death: Take the following precautions when checking the tractor. • Park the machine on firm and level ground. • Set the parking brake.
Page 31 GENERAL B2301, B2601, WSM Checking Engine Oil Level WARNING To avoid personal injury: • Be sure to stop the engine before checking the oil level. 1. Park the machine on a flat surface. 2. Check engine oil before starting the engine or 5 minutes or more after the engine has stopped.
Page 32 GENERAL B2301, B2601, WSM Cleaning Evacuator Valve 1. Open the evacuator valve to get rid of large particles of dust and dirt. (1) Evacuator Valve 9Y1211156GEG0011US0 Cleaning Grill and Radiator Screen WARNING To avoid personal injury or death: • Be sure to stop the engine and remove the key before removing the screen.
Page 33 GENERAL B2301, B2601, WSM Checking and Cleaning of Electrical Wiring and Battery Cables WARNING To avoid personal injury or death: • 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 34: Check Points Of Every 50 Hours
GENERAL B2301, B2601, WSM [2] CHECK POINTS OF EVERY 50 HOURS Checking Engine Start System WARNING To avoid personal injury or death: • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test do not operate the tractor.
Page 35 GENERAL B2301, B2601, WSM 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. (1) Grease Fitting (Brake Pedals)
Page 36: Check Points Of Every 100 Hours
GENERAL B2301, B2601, WSM [3] CHECK POINTS OF EVERY 100 HOURS Checking Battery Condition DANGER To avoid the possibility or 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 37 GENERAL B2301, B2601, WSM Battery Charging WARNING To avoid personal injury or death: • 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 38 GENERAL B2301, B2601, WSM Cleaning Air Cleaner Primary Element [Double Element Type] WARNING To avoid personal injury or death: • Be sure to stop the engine and remove the key before cleaning air filter element. 1. Remove the air cleaner cover and primary element.
Page 39 GENERAL B2301, B2601, WSM Cleaning Fuel Filter WARNING To avoid personal injury or death: • Stop the engine and remove the key before checking fuel lines and fuel filter. • Check the fuel lines periodically. The fuel lines are subject to wear and aging.
Page 40: Check Points Of Every 200 Hours
GENERAL B2301, B2601, WSM Adjusting Brake Pedal WARNING To avoid personal injury or death: • Stop the engine and chock the wheels before checking brake pedal. 1. Release the parking brake. 2. Slightly depress the right and left brake pedals and measure free travel at the top of pedal stroke.
Page 41 IMPORTANT • To prevent serious damage to the hydraulic system, use only a KUBOTA genuine filter. • Do not operate the tractor immediately after changing the transmission fluid. Run the engine at medium speed for a few minutes to prevent damage to the transmission.
Page 42 GENERAL B2301, B2601, WSM Checking Intake Air Line 1. Check to see that hoses and hose clamps are tight and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once. (1) Hose...
Page 43: Check Points Of Every 400 Hours
2. After draining reinstall the drain plug. 3. Fill with new KUBOTA SUPER UDT fluid up to the upper notch on the dipstick. 4. After running the engine for a few minutes, stop it and check the oil level again;...
Page 44 8. Make sure that the transmission fluid does not leak past the seal on the filter. IMPORTANT • To prevent serious damage to the hydraulic system, use only a KUBOTA genuine filter. (1) Drain Plug Oil level is acceptable within this (2) Drain Plug (Both Sides) range.
Page 45: Check Point Of Every 800 Hours
GENERAL B2301, B2601, WSM Adjusting Front Axle Pivot [4WD] WARNING To avoid personal injury or death: • Park the tractor on a flat place. • Lower the implement, lock the parking brake and stop the engine. 1. If the front axle pivot pin adjustment is not correct, front wheel vibration can occur causing vibration in the steering wheel.
Page 46: Check Points Of Every 2 Years
GENERAL B2301, B2601, WSM [10] CHECK POINTS OF EVERY 2 YEARS Flushing Cooling System and Changing Coolant WARNING To avoid personal injury or death: • 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 47 GENERAL B2301, B2601, WSM (Continued)  Anti-Freeze WARNING To avoid personal injury or death: • 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 48: Others
The LLC contains anticorrosive agent. If mixed with the cleaning agent, sludge may build up, adversely affecting the engine parts. 7. Kubota's genuine long-life coolant has a service life of 2 years. Be sure to change the coolant every 2 years. NOTE •...
Page 49 GENERAL B2301, B2601, WSM 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 50: Special Tools
GENERAL B2301, B2601, WSM 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 51 GENERAL B2301, B2601, WSM Diesel Engine Compression Tester (for Injection Nozzle) Code No. • 07909-30208 (Assembly) • 07909-30934 (A to F) • 07909-31211 (E and F) • 07909-31231 (H) • 07909-31251 (G) • 07909-31271 (I) • 07909-31281 (J) Application • Use to measure diesel engine compression and diagnostics of need for major overhaul.
Page 52 GENERAL B2301, B2601, WSM Connecting Rod Alignment Tool Code No. • 07909-31661 Application • Use to check the connecting rod alignment. Applicable range • Connecting rod big end I.D. 30 to 75 mm dia. (1.2 to 2.9 in. dia.) • Connecting rod length 65.0 to 300 mm (2.56 to 11.8 in.)
Page 53 GENERAL B2301, B2601, WSM NOTE • The following special tools are not provided, so make them referring to the figure. WSM000001GEG0026US0 Valve Guide Replacing Tool Application • Use to press out and press fit the valve guide. NOTE • The following special tools are not provided, so make them referring to the figure.
Page 54 GENERAL B2301, B2601, WSM Injection Pump Pressure Tester Application • Use to check fuel tightness of injection pumps. NOTE • The following special tools are not provided, so make them referring to the figure. Pressure gauge full scale: More than 29.4 MPa...
Page 55 GENERAL B2301, B2601, WSM Crankshaft Bearing 1 Replacing Tool Application • Use to press out and press fit the crankshaft bearing 1. NOTE • The following special tools are not provided, so make them referring to the figure. [1] Extracting tool 135 mm (5.31 in.)
Page 56 GENERAL B2301, B2601, WSM Socket Application • Use to loosen and tighten the idle gear 2 bearing lock nut. NOTE • The following special tools are not provided, so make them referring to the figure. 28.5 to 28.8 mm (1.12 to 1.13 in.) 3.5 to 3.7 mm (0.14 to 0.15 in.)
Page 57: Special Tools For Tractor
GENERAL B2301, B2601, WSM [2] SPECIAL TOOLS FOR TRACTOR Tie-rod End Lifter Code No. • 07909-39051 Application • Use to remove the tie-rod end with ease. WSM000001GEG0029US0 Toe-in Gauge Code No. • 07909-31681 Application • This allows easy measurement of toe-in for all machine models.
Page 58 GENERAL B2301, B2601, WSM Injector CH3 Code No. • 07916-52501 Application • Use to put calcium chloride solution into a rear wheel and to remove it. WSM000001GEG0031US0 PTO Shift Arm Ball Guide Application • Use for compressing the ball and spring into the transmission case.
Page 59 GENERAL B2301, B2601, WSM Check and High Pressure Relief Valve Assembly Tool Application • Use for readjusting relief valve pressure. 30.0 mm (1.18 in.) Chamfer 0.4 mm (0.12 in.) 1.05 rad (60.0 °) 21.0 mm (0.827 in.) Chamfer 3.0 mm (0.12 in.) Chamfer 0.3 mm (0.01 in.)
Page 60: Tires
IMPORTANT • Do not use tires other than those approved by KUBOTA. Though the tire pressure is factory-set to the prescribed level, it naturally drops slowly in the course of time. Thus, check it everyday and inflate as necessary.
Page 61: Wheel Adjustment
GENERAL B2301, B2601, WSM [2] WHEEL ADJUSTMENT WARNING To avoid personal injury or death: • When working on slopes or when working with trailer, set the wheel tread as wide as practical for maximum stability. • Support tractor securely on stands before removing a wheel.
Page 62 GENERAL B2301, B2601, WSM Front Wheels Treads [USA Models] Model B2301 B2601 B2301, B2601 B2301, B2601 23 × 8.50-12 23 × 8.50-12 Tires 6-12 Farm 7-12 Farm 21 × 8.00-10 Bar Turf lnd. Tread (a) 800 mm (31.5 in.) 815 mm (32.1 in.) 835 mm (32.9 in.)
Page 63: Rear Wheels
GENERAL B2301, B2601, WSM (2) Rear Wheels Rear Wheels Rear tread width can not be adjusted. IMPORTANT • Always attach tires as shown in the drawings. • If not attached as illustrated, transmission parts may be damaged. • When re-fitting or adjusting a wheel, tighten the bolts to the...
Page 64 GENERAL B2301, B2601, WSM Rear Wheels Tread [USA Models] Model B2301 B2601 B2301, B2601 33 × 12.5-15 Turf Tires 9.5-16 Farm 11.2-16 Farm 31 × 15.5-15 Bar 12-16.5 lnd. Tread A 900 mm (35.4 in.) 950 mm (37.4 in.) 950 mm (37.4 in.)
Page 65: Ballast
GENERAL B2301, B2601, WSM [3] BALLAST WARNING To avoid personal injury or death: • Additional ballast will be needed for transporting heavy implements. When the implement is raised, drive slowly over rough ground, regardless of how much ballast is used.
Page 66 GENERAL B2301, B2601, WSM Rear Ballast Add weight to rear wheels if needed to improve traction or for stability. The amount of rear ballast should be matched to job and the ballast should be removed when it is not needed.
Page 67: Implement Limitations
KUBOTA. Use with implements which are not sold or approved by KUBOTA and 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. [Any malfunctions or failures of the tractor resulting from use with improper implements are not covered by the warranty.]...
Page 68 GENERAL B2301, B2601, WSM Implement Remarks B2301 B2601 Max. cutting width 152 cm (60 in.) Mid-mount Max. load capacity 140 kg (300 lbs) Max. cutting width 122 cm (48 in.) Rotary cutter (1 Blade) Max. load capacity 204 kg (450 lbs) Mower Max.
Page 69 ENGINE KiSC issued 11, 2014 A...
Page 70 MECHANISM CONTENTS 1. ENGINE BODY........................... 1-M1 [1] CLOSED BREATHER ......................1-M1 [2] GOVERNOR......................... 1-M2 KiSC issued 11, 2014 A...
Page 71 ENGINE B2301, B2601, WSM 1. ENGINE BODY [1] CLOSED BREATHER Closed breather system has been adopted to prevent the release of blow-by gas into the atmosphere. After its oil content is filtered by oil shield (4), the blow by gas in fed back to the intake manifold through breather valve (3) to be used for re-combustion.
Page 72 ENGINE B2301, B2601, WSM [2] GOVERNOR Three Lever Type Fork Lever The governor system is a mechanical governor that used the flyweight (5). The flyweight (5) is mounted on the governor shaft that rotates at the same speed as the crankshaft.
Page 73 ENGINE B2301, B2601, WSM (Overloaded Operation) The amount of the movement of the fork lever assembly is limited with the fuel limitation bolt (10) and can not be moved in the direction of the fuel increase. As overload reduces the centrifugal force of the...
Page 74 SERVICING CONTENTS 1. TROUBLESHOOTING.........................1-S1 2. SERVICING SPECIFICATIONS ....................1-S5 3. TIGHTENING TORQUES......................1-S11 [1] TRACTOR SECTION ......................1-S11 [2] ENGINE SECTION ......................1-S11 4. CHECKING, DISASSEMBLING AND SERVICING ..............1-S12 [1] CHECKING AND ADJUSTING....................1-S12 (1) Engine Body ........................1-S12 (2) Lubricating System ......................1-S14 (3) Cooling System ......................1-S14 (4) Fuel System........................1-S17 [2] PREPARATION ........................1-S21 (1) Draining Lubricants and Coolant ...................1-S21...
Page 75: Troubleshooting
ENGINE B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. No fuel Check fuel Engine Does Not Start 2. Air in the fuel system Bleed air G-33 3. Water in the fuel system Solution order 1-S17 1.
Page 76 ENGINE B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 18.Stop solenoid Solution order 8-S15 Engine Does Not malfunctioning 1. Check or replace stop solenoid Start 2. Check or repair wire harness 8-M1 1. Battery discharged Charge battery...
Page 77 ENGINE B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Low grade fuel used Check fuel Either Black or Dark Gray Exhaust Gas Is 2. Fuel filter clogged Solution order G-24 Observed 1. Replace fuel filter 2.
Page 78 ENGINE B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Engine oil insufficient Check engine oil Low Oil Pressure 2. Oil filter cartridge clogged Replace oil filter cartridge G-25 3. Oil pump damaged Replace oil pump 1-S51 4.
Page 79: Servicing Specifications
ENGINE B2301, B2601, WSM 2. SERVICING SPECIFICATIONS ENGINE BODY Item Factory Specification Allowable Limit Compression Pressure 3.73 to 4.11 MPa 2.26 MPa 38.0 to 42.0 kgf/cm 23.0 kgf/cm 541 to 597 psi 327 psi • Variance Among Cylinders – 10 % or less Valve Clearance (Cold) 0.145 to 0.185 mm...
Page 80 ENGINE B2301, B2601, WSM Item Factory Specification Allowable Limit Rocker Arm Shaft to Rocker Arm Clearance 0.016 to 0.045 mm 0.10 mm 0.00063 to 0.0017 in. 0.0039 in. • Rocker Arm Shaft O.D. 11.973 to 11.984 mm – 0.47138 to 0.47181 in.
Page 81 ENGINE B2301, B2601, WSM Item Factory Specification Allowable Limit Piston Pin Bore I.D. 22.000 to 22.013 mm 22.03 mm 0.86615 to 0.86665 in. 0.8673 in. Piston Pin to Small End Bushing Clearance 0.014 to 0.038 mm 0.15 mm 0.00055 to 0.0014 in.
Page 82 ENGINE B2301, B2601, WSM Item Factory Specification Allowable Limit Crankshaft to Crankshaft Bearing 1 Oil Clearance 0.0340 to 0.114 mm 0.20 mm 0.00134 to 0.00448 in. 0.0079 in. • Crankshaft O.D. 47.934 to 47.950 mm – 1.8872 to 1.8877 in.
Page 83 ENGINE B2301, B2601, WSM LUBRICATING SYSTEM Item Factory Specification Allowable Limit Engine Oil Pressure At Idle Speed – 49 kPa 0.5 kgf/cm 7 psi At Rated Speed 196 to 441 kPa 147 kPa 2.0 to 4.5 kgf/cm 1.5 kgf/cm 28.5 to 64 psi 21.3 psi...
Page 84 ENGINE B2301, B2601, WSM FUEL SYSTEM Item Factory Specification Allowable Limit Injection Pump Injection Timing 0.2837 to 0.3097 rad – [D1005] (16.25 to 17.75 °) after T.D.C. Injection Timing 0.2662 to 0.3272 rad – [D1105] (17.25 to 18.75 °) before T.D.C.
Page 85: Tightening Torques
ENGINE B2301, B2601, WSM 3. TIGHTENING TORQUES Tightening torque of screws, bolts and nuts on the table below are specially specified. (For general use screws, bolts and nuts: Refer to "5. TIGHTENING TORQUES" on page G-11.) NOTE • In removing and applying the bolts and nuts marked with "*", a pneumatic wrench or similar pneumatic tool, if employed, must be used with enough care not to get them seized.
Page 86: Checking, Disassembling And Servicing
ENGINE B2301, B2601, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Engine Body Compression Pressure 1. Operate the engine until it is warmed up. 2. Stop the engine. 3. Remove the air cleaner, the muffler and all glow plugs (or nozzles).
Page 87 ENGINE B2301, B2601, WSM Valve Clearance 1 IMPORTANT • Valve clearance must be checked and adjusted when engine is cold. 1. Remove the head cover, the glow plugs and the timing window cover on the clutch housing. 2. Align the "1TC" mark line on the flywheel and center of timing window so that the No.
Page 88: Lubricating System
ENGINE B2301, B2601, WSM (2) Lubricating System Engine Oil Pressure 1. Remove the engine oil pressure switch, and set an oil pressure tester. 2. Start the engine. After warming up, measure the oil pressure of both idling and rated speeds.
Page 89 ENGINE B2301, B2601, WSM Fan Belt Damage and Wear 1. Check the fan belt for damage. 2. If the fan belt is damaged, replace it. 3. Check if the fan belt is worn and sunk in the pulley groove. 4. If the fan belt is nearly worn out and deeply sunk in the pulley groove, replace it.
Page 90 ENGINE B2301, B2601, WSM CAUTION • When removing the radiator cap, wait at least ten minutes after the engine has stopped and cooled down. Otherwise, hot water may gush out, scalding nearby people. 9Y1211156ENS0012US0 Radiator Cap Air Leakage 1. Set a radiator tester (1) and adaptor (2) on the radiator cap.
Page 91: Fuel System
ENGINE B2301, B2601, WSM (4) Fuel System Injection Timing 1. Remove the injection pipes. 2. Remove the engine stop solenoid. 3. Turn the flywheel counterclockwise (facing the flywheel) until fuel flows from the delivery valve holder. 4. Continue to turn the flywheel slowly, and stop it as soon as the fuel level at the tip of the delivery valve holder begins to increase.
Page 92 5. Set the speed control lever to the maximum speed position. 6. Operate the starter to increase the pressure. 7. If the pressure can not reach the allowable limit, replace the pump with new one or repair with a Kubota-authorized pump service shop. 13.73 MPa...
Page 93 ENGINE B2301, B2601, WSM Nozzle Spraying Condition CAUTION • Check the injection pressure and condition after you make sure that there is nobody standing in the direction the fume goes. • If the fume from the nozzle directly injects the human body, cells may be destroyed and blood poisoning may be caused.
Page 94 ENGINE B2301, B2601, WSM Valve Seat Tightness 1. Set the injection nozzle to a nozzle tester. 2. Raise the fuel pressure, and keep at 12.75 MPa (130 kgf/cm 1849 psi) for 10 seconds. 3. If any fuel leak is found, replace the nozzle piece.
Page 95: Preparation
ENGINE B2301, B2601, WSM [2] PREPARATION (1) Draining Lubricants and Coolant Draining Engine Oil CAUTION • Before changing oil, be sure to stop the engine. 1. Start and warm up the engine for approx. 5 minutes. 2. Place an oil pan underneath the engine.
Page 96 4. After draining the transmission fluid, reinstall the drain plugs (1), (3), (5). IMPORTANT • Use only KUBOTA UDT oil. Use of other oils may damage the transmission or hydraulic system. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8.
Page 97: Separating Engine From Clutch Housing
ENGINE B2301, B2601, WSM (2) Separating Engine from Clutch Housing Bonnet, Side Cover and Battery Cord 1. Open the bonnet (1). 2. Disconnect the battery negative cord. 3. Disconnect the head light connectors and remove the bonnet (1) side covers (2).
Page 98: Separating Engine From Front Axle Frame
ENGINE B2301, B2601, WSM Accelerator Rod, Power Steering Hose, Fuel Hoses, Connectors and Others (Right Side) 1. Remove the spring plates (1), oil cooler mounting bolts (2) and oil cooler (3). 2. Remove the clamp (4) and the accelerator rod (5).
Page 99: Disassembling And Assembling
ENGINE B2301, B2601, WSM [3] DISASSEMBLING AND ASSEMBLING (1) External Components Fan, Water Hose, Fan Belt, Dynamo, Muffler, Air Cleaner, Air Cleaner Bracket, Inlet Hose and etc. 1. Remove the external components as shown in the picture. (When reassembling) • Check to see that there are no crack on the fan belt surface.
Page 100 ENGINE B2301, B2601, WSM Injection Pipes 1. Loosen the screws on the pipe clamp (1). 2. Remove the injection pipes (2). (When reassembling) • Sent compressed air into the pipes to blow out dust. Then, reassemble the pipes in the reverse order.
Page 101 ENGINE B2301, B2601, WSM Cylinder Head 1. Loosen the hose clamps (1), and remove the water return hose (2). 2. Remove the cylinder head screw in the order of (n or r) to (a). 3. Lift up the cylinder head to remove.
Page 102: Gear Case
ENGINE B2301, B2601, WSM Valves 1. Remove the valve caps (2). 2. Remove the valve spring collet (3), pushing the valve spring retainer (4) by valve spring replacer (1). 3. Remove the valve spring retainer (4), valve spring (5) and valve stem seal (6).
Page 103 ENGINE B2301, B2601, WSM Gear Case 1. Remove the gear case (1). (When reassembling) • Grease thinly to the oil seal, and install it, ensuring the lip does not come off. (1) Gear Case Bolt Length = 45 mm (1.8 in.) Bolt Length = 50 mm (2.0 in.)
Page 104 ENGINE B2301, B2601, WSM Injection Pump 1. Disconnect the starter spring (4) on the thrust lever side (5). 2. Align the control rack pin (2) with the notch (1) on the crankcase, and remove the injection pump (3). 3. Remove the injection pump shims.
Page 105 ENGINE B2301, B2601, WSM Cam Gear, Idle Gear 1 and Governor Gear 1. Remove the idle gear 1 (4). 2. Remove the fuel camshaft stopper (6). 3. Draw out the fuel cam gear (1) with fuel camshaft (7). 4. Remove the camshaft stopper bolt.
Page 106: Piston And Connecting Rod
ENGINE B2301, B2601, WSM Oil Pan and Oil Strainer 1. Remove the oil pan mounting screws (5). 2. Remove the oil pan (4). 3. Remove the oil strainer (3). (When reassembling) • After cleaning the oil strainer, check to see that the filter mesh is clean, and install it.
Page 107 ENGINE B2301, B2601, WSM Piston 1. Turn the flywheel and bring the piston to top dead center. 2. Draw out the piston upward by lightly tapping it from the bottom of the crankcase with the grip of a hammer. 3. Draw out the other piston in the same method as above.
Page 108 ENGINE B2301, B2601, WSM Piston Ring and Connecting Rod 1. Remove the piston rings using a piston ring tool. 2. Remove the piston pin (7), and separate the connecting rod (6) from the piston (5). (When reassembling) • Install the rings so that the manufacturer's mark (12) near the gap faces the top of the piston.
Page 109: Crankshaft
ENGINE B2301, B2601, WSM (5) Crankshaft Flywheel 1. Secure the flywheel to keep it from turning, using a flywheel stopper. 2. Remove all flywheel screws (1) and then remove the flywheel (2). (When reassembling) • Align the "1TC" mark (a) on the the outer surface of the flywheel horizontally with the alignment mark (b) on the rear end plate.
Page 110 ENGINE B2301, B2601, WSM Crankshaft Assembly 1. Remove the main bearing case screw 2 (1). 2. Pull out the crankshaft assembly. IMPORTANT • Be careful to protect crankshaft bearing 1 from scratches, caused by the crank gear, etc.. (Wrap the gear in vinyl tape, etc.).
Page 111: Servicing
ENGINE B2301, B2601, WSM [4] SERVICING (1) Cylinder Head and Valves Top Clearance 1. Remove the cylinder head. (Do not try to remove the cylinder head gasket.) 2. Move the piston up and stick a strip of fuse [1.5 mm dia.
Page 112 ENGINE B2301, B2601, WSM Cylinder Head Flaw 1. Prepare an air spray red check. 2. Clean the surface of the cylinder head with detergent (2). 3. Spray the cylinder head surface with the red permeative liquid (1). Leave it five to ten minutes after spraying.
Page 113 ENGINE B2301, B2601, WSM Replacing Valve Guide (When removing) 1. Press out the used valve guide using a valve guide replacing tool. (See page "SPECIAL TOOLS".) (When installing) 1. Clean a new valve guide and valve guide bore, and apply engine oil to them.
Page 114 ENGINE B2301, B2601, WSM Correcting Valve and Valve Seat NOTE • Before correcting the valve and the seat, check the valve stem and the I.D. of valve guide section, and repair them if necessary. • After correcting the valve seat, be sure to check the valve recessing.
Page 115 ENGINE B2301, B2601, WSM Free Length and Tilt of Valve Spring 1. Measure the free length (B) of valve spring with vernier calipers. If the measurement is less than the allowable limit, replace it. 2. Put the valve spring on a surface plate, place a square on the side of the valve spring.
Page 116: Idle Gear And Camshaft
ENGINE B2301, B2601, WSM Push Rod Alignment 1. Place the push rod on V blocks. 2. Measure the push rod alignment. 3. If the measurement exceeds the allowable limit, replace the push rod. 0.25 mm Push rod alignment Allowable limit 0.0098 in.
Page 117 ENGINE B2301, B2601, WSM Idle Gear 1 and 2 Side Clearance 1. Set a dial indicator with its tip on the idle gear. 2. Measure the side clearance by moving the idle gear to the front and rear. 3. If the measurement exceeds the allowable limit, replace the idle gear collar.
Page 118: Piston And Connecting Rod
ENGINE B2301, B2601, WSM Oil Clearance of Camshaft Journal 1. Measure the camshaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. for camshaft with a cylinder gauge, and calculate the oil clearance. 3. If the oil clearance exceeds the allowable limit, replace the camshaft.
Page 119 ENGINE B2301, B2601, WSM Oil Clearance between Piston Pin and Small End Bushing 1. Measure the piston pin O.D. where it contacts the bushing with an outside micrometer. 2. Measure the small end bushing I.D. with an inside micrometer, and calculate the oil clearance.
Page 120 ENGINE B2301, B2601, WSM Piston Ring Gap 1. Insert the piston ring into the lower part of the cylinder (the least worn out part) with a piston. 2. Measure the ring gap with a thickness gauge. 3. If the measurement exceeds the allowable limit, replace the piston ring.
Page 121: Crankshaft
ENGINE B2301, B2601, WSM Connecting Rod Alignment 1. Remove the crankpin bearing, and install the connecting rod cap. 2. Install the piston pin in the connecting rod. 3. Install the connecting rod on the connecting rod alignment tool. 4. Put a gauge over the piston pin, and move it against the face plate.
Page 122 ENGINE B2301, B2601, WSM Oil Clearance between Crankpin and Crankpin Bearing 1. Clean the crankpin and crankpin bearing. 2. Put a strip of plastigauge on the center of the crankpin. 3. Install the connecting rod cap and tighten the connecting rod screws to the specified torque, and remove the cap again.
Page 123 ENGINE B2301, B2601, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 1. Measure the O.D. of the crankshaft front journal with an outside micrometer. 2. Measure the I.D. of the crankshaft bearing 1 with an inside micrometer, and calculate the oil clearance.
Page 124 ENGINE B2301, B2601, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 (Crankshaft Bearing 3) 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 125: Cylinder
ENGINE B2301, B2601, WSM (5) Cylinder Cylinder Wear 1. Measure the I.D. of the cylinder at the six positions (see figure) with a cylinder gauge to find the maximum and minimum I.D.'s. 2. Get the difference (Maximum wear) between the maximum and the minimum I.D.'s.
Page 126 ENGINE B2301, B2601, WSM Clearance between Outer Rotor and Pump Body 1. Measure the clearance between the outer rotor and the pump body with a feeler gauge. 2. If the clearance exceeds the factory specifications, replace the oil pump rotor assembly.
Page 127 TRANSMISSION KiSC issued 11, 2014 A...
Page 128 MECHANISM CONTENTS 1. STRUCTURE..........................2-M1 2. FRONT CASE..........................2-M2 3. HYDROSTATIC TRANSMISSION....................2-M3 [1] STRUCTURE ........................2-M3 [2] PUMP AND MOTOR ......................2-M5 [3] OIL FLOW AND VALVES ..................... 2-M6 [4] CONTROL LINKAGE ......................2-M13 4. SPEED SET DEVICE ....................... 2-M14 [1] SPEED SET LINKAGE .......................
Page 129: Structure
TRANSMISSION B2301, B2601, WSM 1. STRUCTURE (1) Front Case Section (3) Front Wheel Drive Section (5) Range Gear Shift Section (6) Differential Gear Section (2) Rear PTO and Mid PTO Shift (4) Hydrostatic Transmission Section Section 9Y1211156TRM0001US0 2-M1 KiSC issued 11, 2014 A...
Page 130: Front Case
TRANSMISSION B2301, B2601, WSM 2. FRONT CASE In this tractor, clutch disc is not installed. The input flange (3) is installed on the clutch shaft (4). Power from the engine is transmitted through the input flange (3) to the clutch shaft (4) and HST pump shaft.
Page 131: Hydrostatic Transmission
TRANSMISSION B2301, B2601, WSM 3. HYDROSTATIC TRANSMISSION [1] STRUCTURE Hydrostatic transmission consists variable displacement piston pump, fixed displacement piston motor and valve system. (1) Input Shaft (Pump Shaft) (6) Check Port (2) Housing (7) Check Port (3) Check and High Pressure...
Page 132 TRANSMISSION B2301, B2601, WSM (1) Cylinder Block (Motor) (9) Piston (2) Piston (10) Cylinder Block (Pump) (3) Thrust Collar (11) Charge Relief Valve (4) Motor Shaft (12) Needle Bearing (5) Thrust Ball Bearing (13) Valve Plate (6) Thrust Collar (14) Cradle Bearing...
Page 133: Pump And Motor
TRANSMISSION B2301, B2601, WSM [2] PUMP AND MOTOR (1) Piston (3) Oil (A) Pump (a) Swashplate (2) Cylinder (B) Motor Pump and motor cylinder, each containing pistons, are connected by lines. Cylinders and lines are filled with oil Piston ride against swashplates located in pump and motor.
Page 134: Oil Flow And Valves
TRANSMISSION B2301, B2601, WSM [3] OIL FLOW AND VALVES (1) Oil Filter Cartridge (for HST) (7) Check and High Pressure (11) Independent PTO Control (15) Oil Tank (2) Swashplate Relief Valve (for Forward) Valve (16) Hydraulic Pump (3) Cylinder Block (for Pump)
Page 135 TRANSMISSION B2301, B2601, WSM (Continued) The pump and the motor are joined in a closed hydraulic circuit. Most of oil circulates with in the main oil circuit. A little oil lubricates and oozes out from the clearance between the moving parts in the case. Then oil in the main oil circuit of the HST needs to be supplied a want.
Page 136 TRANSMISSION B2301, B2601, WSM Neutral (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump Pump A Port (2) Swashplate Relief Valve (for Reverse) (for Power Steering, Pump B Port (3) Cylinder Block (for Pump) (9) Neutral Valve (for Forward)
Page 137 TRANSMISSION B2301, B2601, WSM (Continued) When the speed control pedal is in "NEUTRAL", the variable swashplate is right-angles to the pump pistons. And the pump pistons only rotate with cylinder block (pump) without reciprocating. Since the oil is not being pumped to the motor, the cylinder block (motor) is stationary. And the output shaft does not rotate.
Page 138 TRANSMISSION B2301, B2601, WSM Forward (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump Pump A Port (2) Swashplate Relief Valve (for Reverse) (for Power Steering, Pump B Port (3) Cylinder Block (for Pump) (9) Neutral Valve (for Forward)
Page 139 TRANSMISSION B2301, B2601, WSM (Continued) When the speed control pedal is stepped on and set to "FORWARD", the variable swashplate is tilted as shown in figure above. As the pump cylinder block rotates with the input shaft, oil is forced out of pump port A at high pressure. As pressure oil from the pump cylinder block enters to motor port C, the pistons, which align with port C, are pushed against the swashplate and slide down the inclined surface.
Page 140 TRANSMISSION B2301, B2601, WSM Reverse (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump Pump A Port (2) Swashplate Relief Valve (for Reverse) (for Power Steering, Pump B Port (3) Cylinder Block (for Pump) (9) Neutral Valve (for Forward)
Page 141: Control Linkage
TRANSMISSION B2301, B2601, WSM (Continued) When the speed control pedal is stepped on and set to "REVERSE", the variable swashplate is tilted as shown in figure above. As the pump cylinder block rotates with the input shaft, oil is forced out of pump port B at high pressure. As pressure oil from the pump cylinder block enters to motor port D, the pistons, which align with port D, are pushed against the swashplate and slide down the inclined surface.
Page 142: Speed Set Device
TRANSMISSION B2301, B2601, WSM 4. SPEED SET DEVICE [1] SPEED SET LINKAGE (1) Speed Set (1) HST pedal (3) Speed Set Lever (5) Brake Pedal (6) Tooth (2) Lever (4) Speed Set Holder The speed set device mainly consists of HST pedal holding section and HST pedal releasing section.
Page 143: Speed Set Release
TRANSMISSION B2301, B2601, WSM (2) Speed Set Release (1) HST pedal (3) Speed Set Lever (5) Brake Pedal (6) Brake Link (2) Lever (4) Speed Set Holder The speed set release is done by depressing the brake pedals (5). When an operator depresses the brake pedal (5), the brake link (6) is pushed by the brake pedals (5).
Page 144: Range Gear Shift Section
TRANSMISSION B2301, B2601, WSM 5. RANGE GEAR SHIFT SECTION Range gear shift lever (1) is located at left side fender. Range gear shift lever (1) can select three speed range, low speed, mid speed and high speed. Range gear shift lever (1) and 14T-21T-29T gear (6) are linked with range shift arm (3) and range shift fork (2) etc..
Page 145: Front Wheel Drive Section
TRANSMISSION B2301, B2601, WSM 6. FRONT WHEEL DRIVE SECTION Front wheel drive lever (1) is located at the right side fender. Front wheel drive lever (1) and shifter are linked. 20T shifter gear (3) is located on the front wheel drive shifter (2).
Page 146: Pto System
TRANSMISSION B2301, B2601, WSM 7. PTO SYSTEM [1] STRUCTURE The PTO shift lever (1) is located at left side fender. The PTO shift lever (1) and the PTO shift arm (2) are linked with the control rod (3). The PTO shift arm (2) shifts the PTO shifter (6).
Page 147: Rear Pto Section
TRANSMISSION B2301, B2601, WSM [2] REAR PTO SECTION When the PTO shift lever (1) is set to "Rear PTO" (R) position, the PTO shift lever (1) pushes the control rod (3). The control rod (3) pushes the PTO shift arm (2). In this state, the PTO shift arm (2) shifts the PTO shifter (5) forward.
Page 148: Rear Pto / Mid-Pto Section
TRANSMISSION B2301, B2601, WSM [3] REAR PTO / MID-PTO SECTION When the PTO shift lever (1) is set to "Rear PTO / Mid PTO" (R/M) position, the PTO shift lever (1) pulls the control rod. The control rod (3) pulls the PTO shift arm (2).
Page 149: Mid-Pto Section
TRANSMISSION B2301, B2601, WSM [4] MID-PTO SECTION When the PTO shift lever (1) is set to "Mid PTO" (M) position, the PTO shift lever pulls the control rod (3). The control rod (3) pulls the PTO shift arm (2). In this state, the PTO shift arm (2) shifts the PTO shifter (5) reverse.
Page 150: Independent Pto
TRANSMISSION B2301, B2601, WSM [5] INDEPENDENT PTO (1) Hydraulic Circuit (1) PTO Clutch (8) Power Steering (2) Independent PTO Lever (9) Hydraulic Pump (3) Independent PTO Control (for HST, Power Steering Valve and Independent PTO) (4) Relief Valve (10) Oil Filter Cartridge...
Page 151: Independent Pto Clutch
TRANSMISSION B2301, B2601, WSM (3) Independent PTO Clutch Independent PTO clutch (2) is located behind the HST pump shaft (1) in the transmission case. Independent PTO clutch (2) is operated with pressured hydraulic oil forced from the independent PTO control valve (3).
Page 152: Independent Pto Lever "Engaged
TRANSMISSION B2301, B2601, WSM (4) Independent PTO Lever "Engaged" When the independent PTO lever (1) is shifted to the "ENGAGED" position, the PTO arm (3) is turned to "ON" position. Hydraulic oil from P port flows through oil passage (7) of the PTO arm (3), oil passage S1 in the transmission case (6) and oil passage S2 in the PTO clutch shaft (5) to the PTO clutch (4).
Page 153: Independent Pto Lever "Disengaged
TRANSMISSION B2301, B2601, WSM (5) Independent PTO Lever "Disengaged" When the independent PTO lever (1) is shifted to the "DISENGAGED" position, the PTO arm (3) is turned to "OFF" position. Hydraulic oil is stopped at the PTO arm (3). This oil flows to the HST port.
Page 154: Differential Gear System
TRANSMISSION B2301, B2601, WSM 8. DIFFERENTIAL GEAR SYSTEM [1] DIFFERENTIAL FUNCTION (1) Spiral Bevel Pinion (3) Differential Side Gear (5) Differential Pinion Shaft (7) Differential Side Gear (2) Differential Pinion (4) Spiral Bevel Gear (6) Differential Pinion (8) Differential Case ...
Page 155: Differential Lock
TRANSMISSION B2301, B2601, WSM [2] DIFFERENTIAL LOCK (1) Differential Pinion (4) Differential Gear Shaft (Right) (6) Differential Case (8) Spiral Bevel Pinion (2) Shift Fork (5) Differential Lock Clutch (7) Differential Pinion Shaft (9) Differential Gear Shaft (Left) (3) Differential Lock Lever When resistance to the right and the left tires are greatly different due to ground conditions or type of work, the tire with less resistance slips and prevents the tractor from moving ahead.
Page 156 SERVICING CONTENTS 1. TROUBLESHOOTING.........................2-S1 2. SERVICING SPECIFICATIONS ....................2-S5 3. TIGHTENING TORQUES......................2-S7 4. CHECKING, DISASSEMBLING AND SERVICING ..............2-S8 [1] CHECKING AND ADJUSTING....................2-S8 (1) HST ..........................2-S8 (2) Independent PTO Control Valve..................2-S13 [2] PREPARATION ........................2-S14 (1) Dismounting the Step and Floor Seat................2-S14 [3] DISASSEMBLING AND ASSEMBLING ................2-S20 (1) Separating Engine and Clutch Housing.................2-S20 (2) Front Case........................2-S20 (3) Hydraulic Transmission (HST)..................2-S21...
Page 157: Troubleshooting
TRANSMISSION B2301, B2601, WSM 1. TROUBLESHOOTING HYDROSTATIC TRANSMISSION Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Oil level is low Check oil level or fill oil to proper level G-28 System Will Not Operate in Either 2. Speed control pedal...
Page 158 TRANSMISSION B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Speed control linkage is Solution order 2-M13 Machine Will Not out of adjustment or 1. Repair or replace linkage Stop in Neutral sticking Position 2. Adjust neutral adjuster 2-S12 1.
Page 159 TRANSMISSION B2301, B2601, WSM INDEPENDENT PTO Reference Symptom Probable Cause Solution Page 1. Operating pressure is low Solution order 2-S13 PTO Clutch Slip 1. Check PTO control valve setting pressure 2. Inspect clutch disc or plate 2-S31 3. Replace PTO clutch or other parts 2-S30 2.
Page 160 TRANSMISSION B2301, B2601, WSM DIFFERENTIAL CASE SECTION Reference Symptom Probable Cause Solution Page 1. Insufficient or improper Check transmission oil Excessive or Unusual type of transmission fluid Noise at All Time used 2. Improper backlash Inspect or adjust backlash 2-S44...
Page 161: Servicing Specifications
TRANSMISSION B2301, B2601, WSM 2. SERVICING SPECIFICATIONS HYDROSTATIC TRANSMISSION (HST) Item Factory Specification Allowable Limit Charge Relief Valve Setting Pressure 0.4 to 0.6 MPa – 4 to 6 kgf/cm 60 to 80 psi Check and High Pressure Relief Valve Setting Pressure 23 to 25 MPa –...
Page 162 TRANSMISSION B2301, B2601, WSM TRANSMISSION CASE AND DIFFERENTIAL GEAR Item Factory Specification Allowable Limit Shift Fork to Shifter Groove Clearance 0.10 to 0.35 mm 0.5 mm 0.004 to 0.014 in. 0.020 in. Differential case to Differential Side Gear Clearance 0.025 to 0.066 mm 0.30 mm...
Page 163: Tightening Torques
TRANSMISSION B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 164: Checking, Disassembling And Servicing
TRANSMISSION B2301, B2601, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) HST Charge Relief Pressure CAUTION • When checking, park the tractor on flat ground and fully engage the parking brake. 1. Remove the cover (1). 2. Remove the plug from P1 port (reverse) (2) or P2 port (forward) (3).
Page 165 TRANSMISSION B2301, B2601, WSM High Pressure Relief Valve (Reverse) CAUTION • When checking, park the tractor on flat ground and fully engage the parking brake. 1. Remove the cover (1). 2. Remove the plug from P1 port (reverse) (2). NOTE •...
Page 166 TRANSMISSION B2301, B2601, WSM High Pressure Relief Valve (Forward) CAUTION • When checking, park the tractor on flat ground and fully engage the parking brake. 1. Remove the cover (1). 2. Remove the plug from P2 port (forward) (3). NOTE •...
Page 167 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 to replace with genuine parts. • As the HST may be damaged if the pressure is set to higher by mistake, be careful when adjusting it.
Page 168 TRANSMISSION B2301, B2601, WSM Adjusting Neutral 1. Disengage the front wheel drive lever. (Drive only rear wheels.) 2. Lift the rear of the tractor so that the rear wheels are off the ground and operate the engine at low idling and drive only rear wheels.
Page 169: Independent Pto Control Valve
TRANSMISSION B2301, B2601, WSM (2) Independent PTO Control Valve Independent PTO Control Valve Setting Pressure 1. Remove the plug (2) with a hexagon wrench. 2. Install the adapter (3) to the independent PTO control valve (1). 3. Connect the cable and the pressure gauge to the adapter (3).
Page 170: Preparation
TRANSMISSION B2301, B2601, WSM [2] PREPARATION (1) Dismounting the Step and Floor Seat Battery Cable 1. Open the bonnet. 2. Disconnect the battery negative cable (1). NOTE • When disconnecting the battery cables, disconnect the grounding cable first. When connecting, the positive cable first.
Page 171 4. After draining the transmission fluid, reinstall the drain plugs (1), (3), (5). IMPORTANT • Use only KUBOTA UDT oil. Use of other oils may damage the transmission or hydraulic system. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8.
Page 172 TRANSMISSION B2301, B2601, WSM Panel Lower Cover 1. Remove the panel lower cover mounting bolts and disconnect the key switch connector. 2. Remove the panel lower cover (1). (1) Panel Lower Cover 9Y1211156TRS0013US0 HST Pedal, Floor Mat and Front Cover 1.
Page 173 TRANSMISSION B2301, B2601, WSM ROPS 1. Disconnect the tail light connectors (1) and turn signal light connectors. 2. Remove the tail lights (2). 3. Remove the spring pins (3). 4. Remove the bolt (4). 5. Remove the upper frame (5) from lower frames (6).
Page 174 TRANSMISSION B2301, B2601, WSM Seat and Fenders 1. Remove the seat (1) and the lever grips (2). 2. Disconnect the electrical socket connector (5). 3. Remove the fender LH (3). 4. Remove the fender RH (4). 5. Remove the both side steps and seat under cover (8).
Page 175 TRANSMISSION B2301, B2601, WSM Hydraulic Pipes and Others 1. Remove the clamps (1). 2. Disconnect the suction pipe (2) and delivery pipe (3). 3. Disconnect the loader valve pipes (4). 4. Disconnect the independent PTO pipe (5). 5. Remove the right side brake rod (6) and sub frame (7).
Page 176: Disassembling And Assembling
TRANSMISSION B2301, B2601, WSM [3] DISASSEMBLING AND ASSEMBLING (1) Separating Engine and Clutch Housing • See page 1-S23. 9Y1211156TRS0019US0 (2) Front Case Clutch Housing 1. Support the engine securely. 2. Remove the front case mounting bolts (1). 3. Remove the front case (3) from the engine.
Page 177: Hydraulic Transmission (Hst)
TRANSMISSION B2301, B2601, WSM Clutch Shaft and Ball Bearing 1. Remove the oil seal (6). 2. Remove the circlip (4), (5). 3. Remove the clutch shaft (2) from the front case (1). (1) Front Case (4) External Circlip (2) Clutch Shaft...
Page 178 TRANSMISSION B2301, B2601, WSM Plate Push Rod, Neutral Arm and Neutral Holder 1. Remove the plate push rod (1). 2. Remove the spring (4). 3. Remove the neutral arm mounting bolt. 4. Loosen the bolt of the neutral holder (3).
Page 179 TRANSMISSION B2301, B2601, WSM Check and High Pressure Relief Valve 1. Remove the valve plug (1) with a hex. wrench. 2. Remove the spring (3) and the valve (4). (When reassembling) 59 to 78 N·m Check and high pressure Tightening torque 6.1 to 7.9 kgf·m...
Page 180 TRANSMISSION B2301, B2601, WSM Trunnion Shaft 1. Remove the circlip (1) and oil seal (3) from the HST housing. 2. Remove the circlip (4) from the trunnion shaft (2). 3. Remove the swash plate (5). 4. Strike out the trunnion shaft (2) slightly with a plastic hammer and remove the trunnion shaft (2).
Page 181: Pto Clutch Case
TRANSMISSION B2301, B2601, WSM (4) PTO Clutch Case Separating Transmission Case and PTO Clutch Case 1. Remove the transmission case mounting bolts. 2. Separate the transmission case (1) from the differential case (2). 3. Remove the PTO brake plate 4 mounting bolt (4).
Page 182: Sub Gear Shaft
TRANSMISSION B2301, B2601, WSM (6) Sub Gear Shaft Sub Gear Shaft Assembly 1. Remove the circlip (1) from the sub gear shaft (2). 2. Remove the sub gear shaft assembly (3) from the transmission case. (1) Circlip (3) Sub Gear Shaft Assembly...
Page 183: Front Wheel Drive Shaft
TRANSMISSION B2301, B2601, WSM (7) Front Wheel Drive Shaft 4WD Shaft 1. Remove the circlip from the 4WD shaft (1). 2. Remove the 4WD gear (8) from the 4WD shaft (1). 3. Remove the 4WD shaft (1) with the 26T gear (3).
Page 184 TRANSMISSION B2301, B2601, WSM 4WD Shift Lever 1. Remove the bolt (4) and the washer with rubber (3). (When reassembling) • Install the 4WD gear (5) to the 4WD shaft. • Install the 4WD shaft arm (6) to the 4WD gear (5).
Page 185: Independent Pto Clutch Shifter
TRANSMISSION B2301, B2601, WSM (8) Independent PTO Clutch Shifter Installing PTO Shifter 1. Install the spring (3) and the ball (2) to the transmission. 2. Push the ball (2) by finger from the inside of the transmission case. 3. Push the PTO shift arm ball guide (1) into the transmission case as shown in the picture.
Page 186: Independent Pto Clutch
TRANSMISSION B2301, B2601, WSM (9) Independent PTO Clutch PTO Clutch Case 1. Remove the external circlip (11) from the spline boss (12). 2. Remove the internal circlip (13) from the PTO clutch case (2). 3. Remove the clutch discs (9) and the clutch plates (10) from the PTO clutch case (2).
Page 187 TRANSMISSION B2301, B2601, WSM PTO Clutch Spring 1. Set the PTO clutch spring compressor (1) to the PTO clutch case (2). 2. Tighten the nut and remove the external circlip (3). 3. Remove the spring collar (4) and the PTO clutch spring (5).
Page 188 TRANSMISSION B2301, B2601, WSM Spline Boss Circlip 1. Push the circlip with a small screw driver through the small hole of the spline boss (1). 2. Lift the circlip (2) with a screw driver not to damage it. (When reassembling) •...
Page 189 TRANSMISSION B2301, B2601, WSM PTO Shaft 1. Remove the thrust bearing (6) and the PTO shifter (4) not to damage the seal rings (5) located at the PTO shaft front side. 2. Remove the seal rings (5) located at the PTO shaft rear side.
Page 190: Mid-Pto Section
TRANSMISSION B2301, B2601, WSM (10) Mid-PTO Section Mid-Gear and Idle Shaft 1. Remove the idle shaft (2) from the transmission case using a screw driver. 2. Remove the mid-gear (1) from the transmission case. 3. Remove the ball bearings (4), (5) and the internal circlip (6) from the mid-gear (1).
Page 191 TRANSMISSION B2301, B2601, WSM Mid-PTO Case and Mid-Gear Shaft 1. Remove the mid-PTO case mounting bolts. 2. Remove the mid-PTO case from the transmission case. 3. Remove the mid-PTO oil seal (4) from the mid-PTO case (2) using a screw driver not to damage it.
Page 192: Differential Gear Section
TRANSMISSION B2301, B2601, WSM (11) Differential Gear Section Rear Axle Case and Rear PTO Cover 1. Remove the rear axle mounting bolts. 2. Remove the left rear axle case (4) and the right rear axle case (2) from the differential case (3).
Page 193 TRANSMISSION B2301, B2601, WSM Differential Gear Assembly 1. Remove the internal circlip (1) from the differential case. 2. Remove the shims (2), (3). 3. Remove the differential gear assembly (4) from the differential case. (When reassembling) • 0.5 mm (0.020 in.) shim.
Page 194: Servicing
TRANSMISSION B2301, B2601, WSM Differential Side Gear and Differential Pinion 1. Put parting marks on the differential pinion (1) and the differential side gear (2). 2. Tap out the dowel pin (3). 3. Remove the differential pinion shaft. 4. Remove the differential pinion (4), differential side gear (2) and shim (5).
Page 195 TRANSMISSION B2301, B2601, WSM Valve Swash Plate Bearing Face 1. Check the swash plate bearing (1) for scratches and excessive wear. 2. If worn or scored, replace it. (When reassembling) • Apply liquid lock (Three Bond 1360F or its equivalent) to the screw.
Page 196: Independent Pto Clutch
TRANSMISSION B2301, B2601, WSM Check and High Pressure Relief Valve 1. Check the valve plug (4) and valve (1) for scratches and damage. 2. Check the valve seat in the port block for damage. 3. Check the spring (2) for breakage and wear.
Page 197: Transmission Case
TRANSMISSION B2301, B2601, WSM Clutch Disc Wear 1. Measure the clutch disc thickness 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. Clutch disc wear 1.55 mm...
Page 198: Differential Gear
TRANSMISSION B2301, B2601, WSM Clearance between Shift Fork and Shift Gear Groove 1. Insert the fork into the shift gear groove and measure the clearance with a feeler gauge. 2. If the clearance exceeds the allowable limit, replace it. 0.10 to 0.35 mm...
Page 199 TRANSMISSION B2301, B2601, WSM Backlash between Differential Pinion and Differential Side Gear 1. Secure the differential case with a vise. 2. Set the dial indicator (lever type) with its finger on the tooth of the differential side gear. 3. Press differential pinion and side gear against the differential case.
Page 200 TRANSMISSION B2301, B2601, WSM Backlash between Spiral Bevel Pinion and Spiral Bevel Gear (1) Shim (2) Spacer (3) Spiral Bevel Pinion (4) Bearing Holder (5) Shim (6) Spiral Bevel Gear (7) Shim 1. Set the dial indicator (lever type) with its finger on the end of spiral bevel pinion (3).
Page 201: Rear Axle
REAR AXLE KiSC issued 11, 2014 A...
Page 202 MECHANISM CONTENTS 1. STRUCTURE..........................3-M1 KiSC issued 11, 2014 A...
Page 203 REAR AXLE B2301, B2601, WSM 1. STRUCTURE (1) Differential Gear Shaft (3) Rear Axle Case (5) Spur Gear (7) Differential Gear (2) Ball Bearing (4) Rear Axle (6) Spiral Bevel Gear The rear axles are the semi floating type with ball bearing (2) between the rear axle (4) and the rear axle case (3), which supports the rear wheel load as well as transmitting power to the rear wheels.
Page 204 SERVICING CONTENTS 1. TROUBLESHOOTING.........................3-S1 2. TIGHTENING TORQUES......................3-S2 3. DIASSEMBLING AND SERVICING ....................3-S3 [1] DIASSEMBLING AND ASSEMBLING...................3-S3 (1) Separating Rear Axle Case .....................3-S3 (2) Disassembling Rear Axle Case ..................3-S4 [2] SERVICING ...........................3-S5 KiSC issued 11, 2014 A...
Page 205: Troubleshooting
REAR AXLE B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Improper backlash Inspect or adjust backlash 2-S42 Excessive or Unusual between differential gear Noise at All Time shaft and final reduction gear 2. Bearing worn...
Page 206: Tightening Torques
REAR AXLE B2301, B2601, WSM 2. 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-11.) Item N·m kgf·m lbf·ft...
Page 207: Diassembling And Servicing
4. After draining the transmission fluid, reinstall the drain plugs (1), (3), (5). IMPORTANT • Use only KUBOTA UDT oil. Use of other oils may damage the transmission or hydraulic system. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8.
Page 208: Disassembling Rear Axle Case
REAR AXLE B2301, B2601, WSM Rear Axle Case 1. Remove the brake rod (7) and right side fender (2). 2. Remove the 3-point hitch delivery pipe 2 (5) and return hose (6). 3. Remove the pipe clamps and 3-point hitch delivery pipe 1 (3).
Page 209 REAR AXLE B2301, B2601, WSM Rear Axle Shaft 1. Remove the fork rod (1). 2. Remove the ball bearing (4) with a puller. 3. Remove the gear (3). 4. Remove the brake shaft assembly (2). 5. Tap out the rear axle shaft (5) with a rubber hammer to the outside.
Page 210 BRAKES KiSC issued 11, 2014 A...
Page 211 MECHANISM CONTENTS 1. LINKAGE ............................ 4-M1 2. OPERATION..........................4-M2 KiSC issued 11, 2014 A...
Page 212 BRAKES B2301, B2601, WSM 1. LINKAGE (1) Parking Brake Lever (3) Turnbuckle (4) Brake Rod (5) Brake Cam Lever (2) Brake Pedal Independent mechanical wet disc brakes are used for the right and left traveling brakes. They are operated by the brake pedals through the mechanical linkages and provide stable braking and require little adjustment.
Page 213 BRAKES B2301, B2601, WSM 2. OPERATION (1) Cam Plate (4) Rear Axle Case (6) Brake Shaft (7) Brake Cam (2) Friction Plate (5) Steel Ball (Differential Gear Shaft) (8) Brake Cam Lever (3) Brake Disc The brake body is incorporated in the rear axle case (4) filled with transmission oil and is designed to brake when the brake disc (3) splinted with the differential gear shaft (6) is pressed against the cam plate (1) by means of the cam mechanism incorporating steel balls (5).
Page 214: Servicing
SERVICING CONTENTS 1. TROUBLESHOOTING.........................4-S1 2. SERVICING SPECIFICATIONS ....................4-S2 3. TIGHTENING TORQUES......................4-S3 4. CHECKING, DISASSEMBLING AND SERVICING ..............4-S4 [1] CHECKING AND ADJUSTING....................4-S4 [2] DISASSEMBLING AND ASSEMBLING ................4-S4 (1) Separating Rear Axle Case .....................4-S5 (2) Disassembling Rear Axle Case ..................4-S6 [3] SERVICING ...........................4-S7 KiSC issued 11, 2014 A...
Page 215: Troubleshooting
BRAKES B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Brake pedal free travel Check or adjust brake pedal free travel 4-S4 Uneven Braking unevenly adjusted Force 2. Brake disc worn Replace brake disc 4-S7 3.
Page 216: Servicing Specifications
BRAKES B2301, B2601, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Brake Pedal Free Travel 30 to 40 mm – 1.18 to 1.57 in. Difference of – 0 to 5 mm Stroke 0 to 0.1 in. (RH and LH)
Page 217: Tightening Torques
BRAKES B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 218: Checking, Disassembling And Servicing
BRAKES B2301, B2601, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Adjusting Brake Pedal Free Travel and Difference of Stroke CAUTION • Stop the engine and chock the wheels before checking brake pedal. • The difference between the right and left pedal plays must be less than 5 mm (0.1 in.).
Page 219: Separating Rear Axle Case
4. After draining the transmission fluid, reinstall the drain plugs (1), (3), (5). IMPORTANT • Use only KUBOTA UDT oil. Use of other oils may damage the transmission or hydraulic system. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8.
Page 220: Disassembling Rear Axle Case
BRAKES B2301, B2601, WSM Rear Axle Case 1. Remove the brake rod (7) and right side fender (2). 2. Remove the 3-point hitch delivery pipe 2 (5) and return hose (6). 3. Remove the pipe clamps and 3-point hitch delivery pipe 1 (3).
Page 221 BRAKES B2301, B2601, WSM Brake Assembly 1. Remove the internal snap ring (1). 2. Remove the brake shaft (2) with brake discs. (When reassembling) • When installing the internal snap ring (1) to rear axle case (3) as shown in the figure.
Page 222 BRAKES B2301, B2601, WSM Height of Cam Plate and Ball 1. Measure the dimensions of the cam plate with the ball installed. 2. If the measurement is less than the allowable limit, replace the cam plate and balls. 3. Inspect the ball holes of cam plate for uneven wear.
Page 223: Front Axle
FRONT AXLE KiSC issued 11, 2014 A...
Page 224 MECHANISM CONTENTS 1. STRUCTURE..........................5-M1 [1] 4 WHEEL DRIVE MODEL ....................5-M1 KiSC issued 11, 2014 A...
Page 225 FRONT AXLE B2301, B2601, WSM 1. STRUCTURE [1] 4 WHEEL DRIVE MODEL (1) Axle (6) Bevel Gear (11) Spiral Bevel Gear (16) Spiral Bevel Pinion Shaft (2) Axle Flange (7) Differential Yoke Shaft, L.H. (12) Differential Yoke Shaft, R.H. (17) Bevel Gear Shaft...
Page 226: Servicing
SERVICING CONTENTS 1. TROUBLESHOOTING.........................5-S1 2. SERVICING SPECIFICATIONS ....................5-S2 3. TIGHTENING TORQUES......................5-S3 4. CHECKING, DISASSEMBLING AND SERVICING ..............5-S4 [1] CHECKING AND ADJUSTING....................5-S4 [2] DISASSEMBLING AND ASSEMBLING ................5-S5 (1) Separating Front Axle Assembly ..................5-S5 (2) Disassembling Front Axle Assembly ................5-S6 [3] SERVICING .........................5-S12 KiSC issued 11, 2014 A...
Page 227: Troubleshooting
FRONT AXLE B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Tire pressure uneven Adjust tire pressure G-45 Front Wheels Wander to Right or Left 2. Improper toe-in Adjust toe-in 5-S4 adjustment (improper alignment) 3.
Page 228: Servicing Specifications
FRONT AXLE B2301, B2601, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Front Wheel Alignment Toe-in 0 to 10 mm – 0 to 0.39 in. Front Axle Rocking Force 50.0 to 100.0 N – 5.1 to 10.2 kgf 12.8 to 22.4 lbf...
Page 229: Tightening Torques
FRONT AXLE B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 230: Checking, Disassembling And Servicing
FRONT AXLE B2301, B2601, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Toe-in 1. Inflate the tires to the specified pressure. 2. Turn the front wheels straight ahead. 3. Measure the toe-in ((B) - (A)). 4. If the measurement is not within the factory specifications, adjust the tie-rod length.
Page 231: Disassembling And Assembling
NOTE • After ten minutes, check the oil level again, add oil to prescribed level. • Use KUBOTA SUPER UDT fluid or SAE 80, 90 gear oil. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8. 3.5 L Front axle case oil capacity 3.7 U.S.qts...
Page 232: Disassembling Front Axle Assembly
FRONT AXLE B2301, B2601, WSM Front Axle Holder and Front Axle 1. Place the disassembling stand under the front axle. 2. Remove the front axle holder mounting bolts (1). 3. Separate the front axle holders (2), (3). 4. Separate the front axle from the front axle frame.
Page 233 FRONT AXLE B2301, B2601, WSM Bevel Gear Case 1. Remove the bevel gear case mounting screws. 2. Remove the bevel gear case (2) and front gear case (1) as a unit from the front axle case (4). (When reassembling) • Apply grease to the O-ring (3) and be careful not to damage it.
Page 234 FRONT AXLE B2301, B2601, WSM Bevel Gear Shaft and Bevel Gear Case Oil Seal 1. Remove the external cir-clip (3). 2. Remove the bevel gear case (6) from the front gear case (7). 3. Remove the oil seal (9). 4. Remove the ball bearing (8).
Page 235 FRONT AXLE B2301, B2601, WSM Bevel Gear Case Gears 1. Remove the internal snap ring (5). 2. Remove the bevel gears (3), (2) with ball bearings (7), (6) and shims (4). (When reassembling) • Install the shim (4) to their original position.
Page 236 FRONT AXLE B2301, B2601, WSM Axle 1. Remove the bearing (1). 2. Remove the bevel gear (2). 3. Remove the collar (3). 4. Tap out the axle (4). (When reassembling) • Install the oil seal (7) of axle flange (6), noting its direction as shown in the figure.
Page 237 FRONT AXLE B2301, B2601, WSM Spiral Bevel Pinion Shaft and Differential Gear Assembly 1. Remove the oil seal from the front axle case (5). 2. Remove the internal cir-clip (2) and the collar (3). 3. Tap out the spiral bevel pinion shaft (4) to the rear side.
Page 238: Servicing
FRONT AXLE B2301, B2601, WSM [3] SERVICING Clearance between Differential Case and Differential Pinion 1. Measure the differential pinion boss O.D. with an outside micrometer. 2. Measure the differential case bore I.D. with a cylinder gauge, and calculate the clearance.
Page 239 FRONT AXLE B2301, B2601, WSM Backlash between Spiral Bevel Pinion Shaft and Spiral Bevel Gear 1. Place the solder wire (2) on the gear tooth of the spiral bevel gear (1). 2. Install the spiral bevel gear (1) and the differential yoke shaft (3) into the front axle case.
Page 240 FRONT AXLE B2301, B2601, WSM Backlash between 10T or 11T Bevel Gear and 16T Bevel Gear 1. Stick a strip of fuse to three spots on the 16T bevel gear (1) with grease. 2. Fix the front axle case, bevel gear case and front gear case.
Page 241 FRONT AXLE B2301, B2601, WSM Clearance between Front Axle Case Bosses and Bracket Bushing 1. Measure the front axle case bosses O.D. with an outside micrometer. 2. Measure the bracket Bushing I.D. with a cylinder gauge, and calculate the clearance.
Page 242 STEERING KiSC issued 11, 2014 A...
Page 243 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT ....................... 6-M1 2. STEERING CONTROLLER......................6-M2 3. STEERING CYLINDER ......................6-M3 4. HYDRAULIC PUMP........................6-M4 KiSC issued 11, 2014 A...
Page 244: Hydraulic Circuit
STEERING B2301, B2601, WSM 1. HYDRAULIC CIRCUIT The model is provided with a full hydrostatic power steering. In the hydrostatic power steering, the steering control is connected to the steering cylinder with only the hydraulic piping. Accordingly, it does not have mechanical transmitting parts such as steering gear, pitman arm, drag link, etc..
Page 245: Steering Controller
STEERING B2301, B2601, WSM 2. STEERING CONTROLLER The steering controller consists of a control valve (4) and a metering device (3).  Control Valve The control valve is a rotating spool type. When the steering wheel is not turned, the position of the spool (7) and sleeve (9) is kept neutral by the centering spring (8).
Page 246: Steering Cylinder
STEERING B2301, B2601, WSM 3. STEERING CYLINDER (1) Rod (3) Rod Cover (5) Piston Seal (7) O-ring (2) Dust Seal (4) U gasket (6) Cylinder Tube The steering cylinder is single piston both rod double-acting type. This steering cylinder is installed parallel to the front axle and connected to tie-rods.
Page 247: Hydraulic Pump
STEERING B2301, B2601, WSM 4. HYDRAULIC PUMP • See page 7-M2. 9Y1211156STM0004US0 6-M4 KiSC issued 11, 2014 A...
Page 248 SERVICING CONTENTS 1. TROUBLESHOOTING.........................6-S1 2. SERVICING SPECIFICATIONS ....................6-S3 3. TIGHTENING TORQUES......................6-S4 4. CHECKING, DISASSEMBLING AND SERVICING ..............6-S5 [1] CHECKING..........................6-S5 (1) Relief Valve ........................6-S5 (2) Hydraulic Pump for Power Steering ................6-S5 [2] DISASSEMBLING .........................6-S6 (1) Separating Power Steering Controller ................6-S6 (2) Power Steering Controller ....................6-S6 (3) Power Steering Cylinder....................6-S7 [3] SERVICING ...........................6-S9 (1) Power Steering Cylinder....................6-S9...
Page 249: Troubleshooting
STEERING B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Steering controller Replace steering controller 6-S6 Cannot Be Steered malfunctioning 1. Tire air pressure of the Check air pressure G-45 Hard Steering tires is incorrect 2.
Page 250 STEERING B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Tire air pressure of the Check air pressure G-45 Front Wheels Wander tires is incorrect to Right and Left 2. Improper toe-in Adjust toe-in 5-S4 adjustment 3.
Page 251: Servicing Specifications
STEERING B2301, B2601, WSM 2. SERVICING SPECIFICATIONS POWER STEERING BODY Item Factory Specification Allowable Limit Relief Valve Setting Pressure 11.5 to 12.5 MPa – 118 to 127 kgf/cm 1670 to 1810 psi POWER STEERING CYLINDER Item Factory Specification Allowable Limit Steering Cylinder I.D.
Page 252: Tightening Torques
STEERING B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 253: Checking, Disassembling And Servicing
STEERING B2301, B2601, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING (1) Relief Valve Relief Valve Operating Pressure 1. Disconnect the power steering hose L.H. (or R.H.) from steering the power steering cylinder, and set a pressure gauge and cable.
Page 254: Disassembling
STEERING B2301, B2601, WSM [2] DISASSEMBLING (1) Separating Power Steering Controller Steering Wheel, Meter Panel Bonnet and Fuel Tank • See page 1-S23. 9Y1211156STS0006US0 Steering Post Assembly 1. Remove the steering post mounting bolts. 2. Disconnect the power steering hoses (3) from the power steering controller (2).
Page 255: Power Steering Cylinder
STEERING B2301, B2601, WSM (3) Power Steering Cylinder Front Wheels • See page 5-S5. 9Y1211156STS0009US0 Tie-rod Joint 1. Remove the slotted nut (4) and remove the tie-rod end (3). 2. Remove the front axle brackets (1), (2). (When reassembling) • Apply grease to the thrust collar of front axle bracket.
Page 256 STEERING B2301, B2601, WSM Power Steering Cylinder CAUTION • Since power steering cylinder is full of high-pressured steering oil, high-pressured oil is injected out from hose adopters by pushing piston rods. • This injected oil can penetrate the skin or eyes causing serious injury.
Page 257: Servicing
STEERING B2301, B2601, WSM [3] SERVICING (1) Power Steering Cylinder Steering Cylinder I.D. 1. Measure the steering cylinder I.D. with a cylinder gauge. 2. If the cylinder I.D. exceed the allowable limit, replace the cylinder barrel. 40.000 to 40.062 mm Factory specification 1.57480 to 1.57724 in.
Page 258: Hydraulic System
HYDRAULIC SYSTEM KiSC issued 11, 2014 A...
Page 259 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT ....................... 7-M1 2. HYDRAULIC PUMP........................7-M2 3. HYDRAULIC CIRCUIT ....................... 7-M3 [1] HYDRAULIC CIRCUIT ......................7-M3 [2] RELIEF VALVE ........................7-M4 [3] POSITION CONTROL VALVE ..................... 7-M5 (1) Structure ......................... 7-M5 (2) Operation........................7-M6 [4] FEEDBACK LINKAGE FOR POSITION CONTROL ............7-M8 4.
Page 260: Hydraulic Circuit
HYDRAULIC SYSTEM B2301, B2601, WSM 1. HYDRAULIC CIRCUIT (1) Oil Filter (7) Regulating Valve (For (12) Oil Filter (18) Boom Cylinder (2) Hydraulic Pump (For 3-point Independent PTO Clutch) (13) HST (19) Bucket Cylinder Hitch) (8) Control Valve for Independent...
Page 261: Hydraulic Pump
HYDRAULIC SYSTEM B2301, B2601, WSM 2. HYDRAULIC PUMP The hydraulic pump consists of the casing (1), side plate (4), and two spur gears (drive gear (3) and driven gear (2)) that are in mesh. Hydraulic pump is driven by the fuel camshaft.
Page 262: Hydraulic Circuit
HYDRAULIC SYSTEM B2301, B2601, WSM 3. HYDRAULIC CIRCUIT [1] HYDRAULIC CIRCUIT Two hydraulic pumps (4), (6) are installed in this series of machines. Hydraulic oil is forced from hydraulic pump (6) to the loader control valve (7), relief valve (8), hydraulic outlet (9) and position control valve (10).
Page 263: Relief Valve
HYDRAULIC SYSTEM B2301, B2601, WSM [2] RELIEF VALVE The hydraulic raising and lowering circuit is fitted with a relief valve to control the maximum pressure. This is a guide piston relief valve with damper, a direct acting relief valve suitable for relatively high...
Page 264: Position Control Valve
HYDRAULIC SYSTEM B2301, B2601, WSM [3] POSITION CONTROL VALVE (1) Structure This position control valve (2) is located under the hydraulic cylinder block (1). This control valve is mechanically connected to the position control lever with linkage. This control valve is also mechanically connected to the lift arm with a feed back rod.
Page 265: Operation
HYDRAULIC SYSTEM B2301, B2601, WSM (2) Operation Neutral Oil forced into the control valve through P port pushes and opens the unload valve (3), and opens the unload valve (3), and then returns to the transmission case through T1 port.
Page 266 HYDRAULIC SYSTEM B2301, B2601, WSM Shockless mechanism operating (Lift to Neutral) When the implement begins to lift up, the feedback rod connected to the lift arm pushes back the spool (2) to near "NEUTRAL" position. When the implement lifts up near the "NEUTRAL"...
Page 267: Feedback Linkage For Position Control
HYDRAULIC SYSTEM B2301, B2601, WSM [4] FEEDBACK LINKAGE FOR POSITION CONTROL When the position control lever is moved to rearward to lift the implement, the spool of the position control valve is pushed in to form a lifting circuit by the motions of the control lever arm, the control lever shaft (3), the connecting arm (7) and the lever (8).
Page 268: Front Loader Control Valve
HYDRAULIC SYSTEM B2301, B2601, WSM 4. FRONT LOADER CONTROL VALVE [1] STRUCTURE The control valve assembly consists of one casting block and four major section as shown above. 1) Inlet and Outlet Section This section has P and T ports.
Page 269: Operation
HYDRAULIC SYSTEM B2301, B2601, WSM [2] OPERATION Neutral (1) Boom Control Section (5) PB Passage 1 T Port B1: B1 Port (2) Bucket Control Section (6) PB Passage 2 P Port B2: B2 Port (3) Spool (7) Load Check Valve...
Page 270 HYDRAULIC SYSTEM B2301, B2601, WSM (1) Boom Control Section (5) Neutral Passage 1 P Port A1: A1 Port (2) Bucket Control Section (6) Load Check Valve T Port (From Boom Cylinder) (3) Spool (7) Passage 1 B1: B1 Port (To Boom Cylinder)
Page 271 HYDRAULIC SYSTEM B2301, B2601, WSM Down (1) Boom Control Section (5) Neutral Passage 1 P Port A1: A1 Port (To Boom Cylinder) (2) Bucket Control Section (6) Load Check Valve T Port B1: B1 Port (3) Spool (7) Passage 1...
Page 272 HYDRAULIC SYSTEM B2301, B2601, WSM Floating (1) Boom Control Section (5) Detent Mechanism P Port A1: A1 Port (2) Bucket Control Section (6) Neutral Passage 1 T Port B1: B1 Port (3) Spool (7) Boom Cylinder PB: PB Port (4) PB Passage 1 Low Pressure 1.
Page 273 HYDRAULIC SYSTEM B2301, B2601, WSM Roll-back (1) Boom Control Section (6) PB Passage 2 P Port B2: B2 Port (2) Bucket Control Section (7) Load Check Valve T Port (To Bucket Cylinder) (3) PB Passage 1 (8) Passage 2 PB: PB Port...
Page 274 HYDRAULIC SYSTEM B2301, B2601, WSM Dump 1 (1) Boom Control Section (6) PB Passage 2 P Port A2: A2 Port (2) Bucket Control Section (7) Load Check Valve T Port (To Bucket Cylinder) (3) PB Passage 1 (8) Passage 2...
Page 275 HYDRAULIC SYSTEM B2301, B2601, WSM Dump 2 (1) Boom Control Section (6) PB Passage 2 P Port A2: A2 Port (2) Bucket Control Section (7) Load Check Valve T Port (To Bucket Cylinder) (3) PB Passage 1 (8) Passage 2...
Page 276: Remote Control Valve (If Equipped)
HYDRAULIC SYSTEM B2301, B2601, WSM 5. REMOTE CONTROL VALVE (IF EQUIPPED) Neutral Pressure-fed oil from the hydraulic pump is delivered into the P port, and flows to the rear hydraulic outlet through BY port. At this time, oil from A port to the T port is blocked by the mechanical check valve (Poppet (1)).
Page 277: Hydraulic Outlet
HYDRAULIC SYSTEM B2301, B2601, WSM 6. HYDRAULIC OUTLET The hydraulic block type outlet is located at the right hand side of the engine. This hydraulic block type outlet is provided to take power out from the tractor to operate the hydraulic cylinders on the implement.
Page 278 SERVICING CONTENTS 1. TROUBLESHOOTING.........................7-S1 2. SERVICING SPECIFICATIONS ....................7-S2 3. TIGHTENING TORQUES......................7-S3 4. CHECKING, DISASSEMBLING AND SERVICING ..............7-S4 [1] CHECKING AND ADJUSTING....................7-S4 (1) Hydraulic Pump (For 3-Point Hitch Hydraulic System)............7-S4 (2) Hydraulic Pump (For Power Steering, PTO Clutch and HST) .........7-S6 (3) 3-Points Hitch Relief Valve ....................7-S8 (4) Lift Arm ..........................7-S8 [2] DISASSEMBLING AND ASSEMBLING ................7-S9...
Page 279: Troubleshooting
HYDRAULIC SYSTEM B2301, B2601, WSM 1. TROUBLESHOOTING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Transmission fluid Check transmission oil Implement Does Not improper Rise (No Noise) 2. Hydraulic pump Solution order 7-S4 malfunctioning 1. Check hydraulic flow test 2.
Page 280: Servicing Specifications
HYDRAULIC SYSTEM B2301, B2601, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Hydraulic Pump (For 3-Point Hitch) Delivery Above – (At No Pressure) 20.1 L/min. Condition • Engine rated speed: 2800 min (rpm) 5.55 U.S.gals/min. • Rated pressure 4.62 Imp.gals/min.
Page 281 HYDRAULIC SYSTEM B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 282: Checking, Disassembling And Servicing
(1) Hydraulic Pump (For 3-Point Hitch Hydraulic System) Test Preparation (For 3-Point Hitch) IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter (Code No. 07916-52792), be sure to use the instructions with that flowmeter. • In this hook-up, there is no relief valve. Therefore while testing, do not close the flowmeter loading valve completely.
Page 283 HYDRAULIC SYSTEM B2301, B2601, WSM Hydraulic Pump Test (For 3-Point Hitch) NOTE • Before pump testing, do the "Test Preparation". 1. Open flowmeter loading valve completely (Turn counterclockwise. 2. Start the engine and set at approx. 2800 min (rpm). 3. Read and note the pump delivery at no pressure.
Page 284: Hydraulic Pump (For Power Steering, Pto Clutch And Hst)
(2) Hydraulic Pump (For Power Steering, PTO Clutch and HST) Test Preparation (For Power Steering, PTO Clutch and HST) IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter (Code No. 07916-52792), be sure to use the instructions with that flowmeter.
Page 285 HYDRAULIC SYSTEM B2301, B2601, WSM Hydraulic Pump Test (For Power Steering, PTO Clutch and HST) NOTE • Before pump testing, do the "Test Preparation". 1. Open flowmeter loading valve completely (Turn counterclockwise. 2. Start the engine and set at approx. 2800 min (rpm).
Page 286: 3-Points Hitch Relief Valve
HYDRAULIC SYSTEM B2301, B2601, WSM (3) 3-Points Hitch Relief Valve 3-Points Hitch Relief Valve Setting Pressure 1. Install the adaptor. Then connect the cable and the pressure gauge to the adaptor (Size 1/4). 2. Start the engine and set the engine speed at 2800 min (rpm).
Page 287: Disassembling And Assembling
HYDRAULIC SYSTEM B2301, B2601, WSM [2] DISASSEMBLING AND ASSEMBLING (1) Hydraulic Pump Removing Hydraulic Pump 1. Open the bonnet then remove the side cover (R.H.) and disconnect the battery grounding cord. 2. Disconnect the connector of the engine stop solenoid and accelerator rod.
Page 288: 3-Point Hitch
4. After draining the transmission fluid, reinstall the drain plugs (1), (3), (5). IMPORTANT • Use only KUBOTA UDT oil. Use of other oils may damage the transmission or hydraulic system. Refer to "4. LUBRICANTS, FUEL AND COOLANT" on page G-8.
Page 289 HYDRAULIC SYSTEM B2301, B2601, WSM Battery Negative Cable 1. Disconnect the battery negative cable (2). (1) Battery (2) Battery Negative Cable 9Y1211156HYS0014US0 Seat 1. Remove the seat (1) and lever grips (2). 2. Remove the both side lever guides (3).
Page 290: 3-Points Hitch: Hydraulic Cylinder
HYDRAULIC SYSTEM B2301, B2601, WSM (4) 3-Points Hitch: Hydraulic Cylinder Checking the Length of the Adjusting Bolt NOTE • Before disassembling the control valve, check the length of the adjusting bolt. 1. Push the spool (1) into the control valve (2).
Page 291 HYDRAULIC SYSTEM B2301, B2601, WSM Control Valve NOTE • When the control valve is installed in the hydraulic cylinder, the hexagon wrench is not aligned straight to the hexagon bolt without pushing the spool as shown in the picture. 1. Push the spool (1) into the control valve (3).
Page 292 HYDRAULIC SYSTEM B2301, B2601, WSM Lift Arm, Hydraulic Arm Shaft and Hydraulic Arm 1. Remove the external snap ring, and remove the lift arm L.H. (2). 2. Draw out the hydraulic arm shaft (3) and lift arm R.H. (4) as a unit.
Page 293: Front Loader Control Valve Assembly (If Equipped)
HYDRAULIC SYSTEM B2301, B2601, WSM Disassembling Position Control Valve 1. After removing the control valve, disassemble the component parts as shown in the picture. (When reassembling) • Readjust the length "L" of the adjusting bolt. (Reference) • Length "L": approximately 10.70 mm (0.4213 in.)
Page 294 HYDRAULIC SYSTEM B2301, B2601, WSM Front Loader Valve Assembly 1. Remove the brake rod (1). 2. Disconnect the 3-point hitch delivery pipe 1 (2), 3-point hitch delivery pipe 2 (4) and return hose (6). 3. Remove the front loader valve pipes (5).
Page 295 HYDRAULIC SYSTEM B2301, B2601, WSM Disassembling Front Loader Control Valve and Relief Valve NOTE • Refer to the page 7-S8 for the relief valve. (1) Plug (2) O-ring (3) Washer (4) Shim (5) Spring (6) Poppet 2 (7) Poppet 1...
Page 296: Remote Control Valve (If Equipped)
HYDRAULIC SYSTEM B2301, B2601, WSM (6) Remote Control Valve (If Equipped) Poppet and Piston (Mechanical Check Valve) 1. Remove the plug 1 (4) and draw out the spring (7), ball guide (3), balls (1), (6), poppet (2) and piston (5).
Page 297 HYDRAULIC SYSTEM B2301, B2601, WSM Side Plate Thickness 1. Measure the side plate thickness with an outside micrometer. 2. If the thickness is less than the allowable limit, replace it. 2.48 to 2.50 mm Factory specification 0.0976 to 0.0984 in.
Page 298: Electrical System
ELECTRICAL SYSTEM KiSC issued 11, 2014 A...
Page 299 MECHANISM CONTENTS 1. WIRING DIAGRAM........................8-M1 2. ENGINE STARTING SYSTEM AND STOPPING SYSTEM ............8-M2 [1] OPC SYSTEM CIRCUIT ...................... 8-M2 [2] CONTROLLER ........................8-M3 [3] SAFETY SWITCH ........................ 8-M6 (1) PTO Select Lever Switch....................8-M6 (2) PTO Clutch Lever Switch ....................8-M6 (3) HST Pedal Switch (HST Model) ..................
Page 301: Engine Starting System And Stopping System
ELECTRICAL SYSTEM B2301, B2601, WSM 2. ENGINE STARTING SYSTEM AND STOPPING SYSTEM This series tractors equipped operator presence control (OPC) system. This system will automatically stop the engine when operator stands up from the seat while shifting the PTO gear shift lever, depressing the HST pedal.
Page 302: Controller
ELECTRICAL SYSTEM B2301, B2601, WSM [2] CONTROLLER Operator Presence Control (OPC) System This series tractor tractors are equipped with an "Operator Presence Control (OPC)" system to control engine starting and engine automatically stopping. This OPC system mainly consists of controller and...
Page 303 ELECTRICAL SYSTEM B2301, B2601, WSM Controller Controller is located inside the panel board. Current from the key switch, safety switches and regulator flows to controller. Controller receives current as data, processes the data, and sends out current computing results to starter motor, relay (engine stop solenoid), and engine stop solenoid.
Page 304: Engine Starting
ELECTRICAL SYSTEM B2301, B2601, WSM Engine Starting When the following conditions become complete, output voltage (12 V) reaches coil terminal of the starter motor from controller k terminal, the engine can be started. PTO Clutch Lever Switch (Disengaged: ON, Engaged: OFF)
Page 305: Safety Switch
ELECTRICAL SYSTEM B2301, B2601, WSM [3] SAFETY SWITCH (1) PTO Select Lever Switch PTO Select Lever Switch This switch locates at transmission case. This switch is a push type. This switch detects the position of the PTO select lever. When the PTO select lever is at "REAR PTO"...
Page 306: Hst Pedal Switch (Hst Model)
ELECTRICAL SYSTEM B2301, B2601, WSM (3) HST Pedal Switch (HST Model) HST Pedal Switch This switch located at the neutral switch stay. This switch is a push type. This switch detects the position of the HST pedal. When HST pedal is at "NEUTRAL" position, this switch is turned to "ON".
Page 307: Starter
ELECTRICAL SYSTEM B2301, B2601, WSM [4] STARTER (1) Housing (2) Magnetic Switch (3) Overrunning Clutch (4) Drive Lever (5) Internal Gear (6) Gear Shaft (7) Planetary Gear (8) Armature Shaft (9) Yoke (10) Brush Holder (11) Rear End Frame The starter is a reduction type.
Page 308: Glow Plug
ELECTRICAL SYSTEM B2301, B2601, WSM [6] GLOW PLUG This plug is a two-material type QGS (Quick Glow System) quick temperature rise, self-controlling function as well as excellent durability. The heater (4) connected in series to the heater (3), which also functions as the resistor, is incorporated in the sheath tube (1) of the super glow plug.
Page 309: Charging System
ELECTRICAL SYSTEM B2301, B2601, WSM 3. CHARGING SYSTEM Charging System Circuit (1) Battery (2) Slow Blow Fuse (3) Dynamo (4) Regulator (5) Fuse (6) Key Switch (7) Instrument Panel (8) OPC Controller The charging system supplies electric power for various electrical devices and also charges the battery while the engine operates.
Page 310: Lighting System
ELECTRICAL SYSTEM B2301, B2601, WSM 4. LIGHTING SYSTEM The lighting system consists of combination switch (light switch and hazard switch), head lights, tail lights, hazard lights, etc.. 9Y1211156ELM0016US0 [1] HEAD LIGHT The light switch, which forms a combination switch with the turn signal light switch, has two position OFF and ON.
Page 311: Hazard Light
ELECTRICAL SYSTEM B2301, B2601, WSM [3] HAZARD LIGHT Hazard switch has two positions; ON and OFF. Blinking the hazard lights as shown in the figure above. The hazard light is operative when the key switch is in either the ON or OFF positions.
Page 312: Instrument Panel
ELECTRICAL SYSTEM B2301, B2601, WSM 5. INSTRUMENT PANEL [1] EASY CHECKER™ If the warning lamps of the Easy Checker™ come on during operation, immediately stop the engine, and find the cause as shown below. Never operate the machine while Easy Checker™...
Page 313 ELECTRICAL SYSTEM B2301, B2601, WSM Coolant Temperature Sensor The coolant temperature sensor is installed to the cylinder head of engine, and its tip is in touch with the coolant. It contains a thermistor (4) whose electrical resistance decreases as the temperature increases.
Page 314 SERVICING CONTENTS 1. TROUBLESHOOTING.........................8-S1 2. SERVICING SPECIFICATIONS ....................8-S8 3. TIGHTENING TORQUES......................8-S9 4. CHECKING AND ADJUSTING....................8-S10 [1] BATTERY ..........................8-S10 [2] FUSE ...........................8-S11 [3] RELAYS ..........................8-S12 (1) Relays..........................8-S12 [4] STARTING SYSTEM......................8-S13 (1) Key Switch........................8-S13 (2) Safety Switches ......................8-S14 (3) OPC Controller ......................8-S15 (4) Engine Stop Solenoid ....................8-S15 (5) Starter..........................8-S15 (6) Glow Plug ........................8-S16...
Page 315: Troubleshooting
ELECTRICAL SYSTEM B2301, B2601, WSM 1. TROUBLESHOOTING FUSE AND WIRING Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Battery discharged or Check or recharge battery 8-S10 All Electrical damaged Equipment Do Not Operate 2. Battery positive cable Repair or replace battery positive cable...
Page 316 ELECTRICAL SYSTEM B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Battery discharged or Recharge or replace battery 8-S11 Pre-heat indicator damaged Lamp Does Not Light When Key Switch Is 2. Slow blow fuse blown Repair glow harness or other...
Page 317 ELECTRICAL SYSTEM B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Solenoid fuse blown (30 A) Replace wire harness or other G-34, 8-M1 Starter Motor Does Not Operate 2. Engine stop solenoid Check engine stop solenoid...
Page 318 ELECTRICAL SYSTEM B2301, B2601, WSM CHARGING SYSTEM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Fuse blown (10 A) Replace wire harness or other G-34, 8-M1 Charging Lamp Does Not Light When Key 2. Wiring harness Repair or replace connector and other...
Page 319 ELECTRICAL SYSTEM B2301, B2601, WSM Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Fuse blown (15 A) Replace fuse G-34 Illumination Light Does Not Light 2. Bulb blown Replace bulb G-34 3. Wiring harness Repair or replace connector and wire...
Page 320 ELECTRICAL SYSTEM B2301, B2601, WSM EASY CHECKER™ Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Engine oil insufficient Check engine oil Oil Pressure Lamp Lights Up When 2. Engine oil pressure too low Solution order 1-S14 Engine Operates 1.
Page 321 ELECTRICAL SYSTEM B2301, B2601, WSM GAUGES Probable Cause and Reference Symptom Solution Checking Procedure Page 1. Fuel gauge damaged Replace fuel gauge 8-S22 Fuel Gauge Does Not Function 2. Fuel level sensor Replace fuel level sensor 8-S22 damaged 3. Wiring harness...
Page 322: Servicing Specifications
ELECTRICAL SYSTEM B2301, B2601, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Battery Voltage More than 12 V – Potential Less than 0.1 V – Difference Glow Plug Resistance Approx. 0.9 Ω – Coolant Temperature Sensor Resistance at 130 °C (266 °F) Approx.
Page 323: Tightening Torques
ELECTRICAL SYSTEM B2301, B2601, WSM 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-11.) Item N·m kgf·m lbf·ft...
Page 324: Checking And Adjusting
ELECTRICAL SYSTEM B2301, B2601, WSM 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 operates.
Page 325: Fuse
ELECTRICAL SYSTEM B2301, B2601, WSM 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 326: Relays
ELECTRICAL SYSTEM B2301, B2601, WSM [3] RELAYS (1) Relays Relay 1. Remove the relay. 2. Apply battery voltage across 2 terminal and 4 terminal, and check for continuity across 1 terminal and 3 terminal. 3. If 0 Ω is not indicated, renew the relay.
Page 327: Starting System
ELECTRICAL SYSTEM B2301, B2601, WSM [4] STARTING SYSTEM (1) Key Switch Connector Voltage 1. Measure the voltage with a voltmeter across the connector B terminal (2) and chassis. 2. If the voltage differs from the battery voltage (11 to 14 V), the wiring harness is damaged.
Page 328: Safety Switches
ELECTRICAL SYSTEM B2301, B2601, WSM 4) Key Switch Key at "START" Position 1. Set and hold the key switch key at the START position. 2. Measure the resistance with an ohmmeter across the B terminal and the G terminal, across the B terminal an the ST terminal, and across the B terminal and the AC terminal.
Page 329: Opc Controller
ELECTRICAL SYSTEM B2301, B2601, WSM (3) OPC Controller OPC Controller 1. Check the "Engine Starting Conditions" and "Automatic Engine Stop Conditions". (See page 8-M5.) 2. If the tractor does not operate appropriately, check all parts according to the "1.TROUBLESHOOTING" section.
Page 330: Glow Plug
ELECTRICAL SYSTEM B2301, B2601, WSM Magnetic Switch Test 1. Disconnect the battery negative cable from the battery. 2. Disconnect the battery positive cable and the leads from the starter B terminal. 3. Remove the starter from the engine. 4. Disconnect the connecting lead (3) from the starter C terminal (2).
Page 331: Charging System
ELECTRICAL SYSTEM B2301, B2601, WSM [5] CHARGING SYSTEM (1) AC Dynamo Dynamo No-load Voltage 1. Disconnect the lead wires from the dynamo. 2. Start the engine, and check the generating voltage of the dynamo. 14 to 15 V (at engine idling...
Page 332: Lighting System
ELECTRICAL SYSTEM B2301, B2601, WSM [6] LIGHTING SYSTEM (1) Combination Switch Combination Switch 1. Remove the steering wheel and panel lower cover. 2. Disconnect the combination switch connector. 3. Remove the combination switch (1) and perform the following checks 1) to 8).
Page 333 ELECTRICAL SYSTEM B2301, B2601, WSM 4) Turn Signal Light Switch Continuity When Setting Switch Knob OFF Position 1. Set the turn signal light switch to the OFF position. 2. Measure the resistance with an ohmmeter across the B3 terminal and TL terminal, the B3 terminal and TR terminal.
Page 334: Flasher Unit
ELECTRICAL SYSTEM B2301, B2601, WSM (2) Flasher Unit Flasher Unit Connector Voltage 1. Remove the instrument panel. 2. Disconnect the connector (1) from the flasher unit (2). 3. Measure the voltage with a voltmeter across the h terminal and chassis.
Page 335: Engine Oil Pressure Switch
ELECTRICAL SYSTEM B2301, B2601, WSM (2) Engine Oil Pressure Switch Engine Oil Pressure Switch Continuity 1. Measure the resistance with an ohmmeter across the switch terminal and the chassis. 2. If 0 Ω is not indicated in the normal state, the switch is damaged.
Page 336: Fuel Sensor
ELECTRICAL SYSTEM B2301, B2601, WSM (4) Fuel Sensor Fuel Sensor 1) Sensor Continuity 1. Remove the fuel lever sensor from the fuel tank. 2. Measure the resistance across the sensor terminal and its body. 3. If the reference value are not indicated, the sensor is damaged.
Page 337: Disassembling And Assembling
ELECTRICAL SYSTEM B2301, B2601, WSM 5. DISASSEMBLING AND ASSEMBLING [1] STARTER (1) Screw (2) Front Bracket (3) Magnetic Switch (4) Overrunning Clutch (5) Drive Lever (6) Internal Gear (7) Shaft (8) Planetary Gear (9) Shaft Assembly (10) Ball (11) Gasket...
Page 338: Ac Dynamo
ELECTRICAL SYSTEM B2301, B2601, WSM [2] AC DYNAMO Stator 1. Remove the nut (3) and separate the stator comp. (4). 2. Remove the screws (1) and remove the stator (2). (1) Screw (3) Nut (2) Stator (4) Stator Comp. 9Y1211156ELS0042US0 Rotor 1.
Page 339: Servicing
ELECTRICAL SYSTEM B2301, B2601, WSM 6. SERVICING [1] STARTER Commutator and Mica 1. Check the contact face of the commutator for wear, and grind the commutator with emery paper if it is slightly worn. 2. Measure the commutator O.D. with an outside micrometer at several points.
Page 340 ELECTRICAL SYSTEM B2301, B2601, WSM Armature Coil 1. Check the continuity between the commutator and armature coil core with an ohmmeter. 2. If it conducts, replace the armature. 3. Check the continuity between the segments of the commutator with an ohmmeter.
Page 341 EDITOR : KUBOTA FARM & INDUSTRIAL MACHINERY SERVICE, LTD. 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 2014. 11, S, EI, EI, engusa Code No.9Y111-11560...

This manual is also suitable for:

B2601

Kubota B2301 Workshop Manual

Information

General

1 Tractor Identification

2 General Precautions

3 Handling Precautions for Electrical Parts and Wiring

4 Lubricants, Fuel and Coolant

5 Tightening Torques

6 Maintenance Check List

7 Check and Maintenance

8 Special Tools

9 Tires

10 Implement Limitations

Servicing

1 Troubleshooting

2 Servicing Specifications

3 Tightening Torques

4 Checking, Disassembling and Servicing

Mechanism

1 Structure

2 Front Case

3 Hydrostatic Transmission

4 Speed Set Device

5 Range Gear Shift Section

6 Front Wheel Drive Section

7 Pto System

8 Differential Gear System

Servicing

Servicing

1 Troubleshooting

2 Tightening Torques

3 Diassembling and Servicing

Servicing

Servicing

Mechanism

Servicing

Mechanism

1 Hydraulic Circuit

2 Hydraulic Pump

3 Hydraulic Circuit

4 Front Loader Control Valve

5 Remote Control Valve (if Equipped)

6 Hydraulic Outlet

Servicing

1 Troubleshooting

2 Servicing Specifications

4 Checking, Disassembling and Servicing

Mechanism

2 Engine Starting System and Stopping System

3 Charging System

4 Lighting System

5 Instrument Panel

Servicing

1 Troubleshooting

2 Servicing Specifications

3 Tightening Torques

4 Checking and Adjusting

5 Disassembling and Assembling

6 Servicing

Quick Links

Chapters

Troubleshooting

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Questions and answers

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Summary of Contents for Kubota B2301