Kubota B2650HSDC Workshop Manual

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WORKSHOP MANUAL

TRACTOR

B2650HSDC,B3350HSDC

KiSC issued 05, 2014 A

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Page 1 WORKSHOP MANUAL TRACTOR B2650HSDC,B3350HSDC KiSC issued 05, 2014 A...
Page 2 TO THE READER This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the B2650HSDC and B3350HSDC. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing".  Information This section primarily contains information below. • Safety First •...
Page 3 Record of Revisions For pdf, use search function {Search word} to find all the revised locations. Last digit Issue Reference of the Main Revised Point and Corrective Measures {Search word} month Page Code No. 2014.05 • Add Diagmaster TO THE READER •...
Page 4 INFORMATION KiSC issued 05, 2014 A...
Page 5: Table Of Contents
INFORMATION CONTENTS 1. SAFETY FIRST ..........................I-1 2. SAFETY DECALS .......................... I-4 3. SPECIFICATIONS.......................... I-8 4. TRAVELING SPEEDS........................I-9 5. DIMENSIONS ..........................I-10 KiSC issued 05, 2014 A...
Page 6: Safety First
INFORMATION B2650HSDC, B3350HSDC, 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 7 INFORMATION B2650HSDC, B3350HSDC, 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 8 INFORMATION B2650HSDC, B3350HSDC, 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 9: Safety Decals
INFORMATION B2650HSDC, B3350HSDC, 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 10 INFORMATION B2650HSDC, B3350HSDC, WSM 9Y1210822INI0002US0 KiSC issued 05, 2014 A...
Page 11 INFORMATION B2650HSDC, B3350HSDC, WSM 9Y1210822INI0003US0 KiSC issued 05, 2014 A...
Page 12 INFORMATION B2650HSDC, B3350HSDC, WSM 9Y1210822INI0004US0 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 13: Specifications
Rear-PTO SAE 1-3/8, 6 splines PTO / Engine speed 1 speed 563 / 2500 min (rpm) Rear-PTO USA No. 5 (KUBOTA 10-tooth) involve spline PTO / Engine speed 1 speed 2500 / 2500 min (rpm) NOTE • * Manufacturer's estimate The company reserves the right to change the specifications without notice.
Page 14: Traveling Speeds
INFORMATION B2650HSDC, B3350HSDC, WSM 4. TRAVELING SPEEDS (At rated engine rpm) Model B2650 Tire size (Rear) 12.4-16 Farm 13.6-16 Turf Range gear km/h km/h shift lever 0 to 5.7 0 to 3.6 0 to 6.0 0 to 3.7 Forward Middle 0 to 8.5...
Page 15: Dimensions
INFORMATION B2650HSDC, B3350HSDC, WSM 5. DIMENSIONS 9Y1210822INI0008US0 I-10 KiSC issued 05, 2014 A...
Page 16 GENERAL KiSC issued 05, 2014 A...
Page 17 GENERAL CONTENTS 1. TRACTOR IDENTIFICATION....................... G-1 [1] MODEL NAME AND SERIAL NUMBER ................G-1 [2] CYLINDER NUMBER ......................G-2 2. GENERAL PRECAUTIONS......................G-3 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING ........G-4 [1] WIRING ..........................G-4 [2] BATTERY ..........................G-6 [3] FUSE ............................
Page 18: Tractor Identification
GENERAL B2650HSDC, B3350HSDC, WSM 1. TRACTOR IDENTIFICATION [1] MODEL NAME AND SERIAL NUMBER When contacting your local KUBOTA distributor, always specify engine serial number, tractor serial number, ROPS serial number and hour meter reading. (1) Tractor Identification Plate (5) Diesel Particulate Filter (DPF) Serial...
Page 19: Cylinder Number
GENERAL B2650HSDC, B3350HSDC, WSM [2] CYLINDER NUMBER The cylinder numbers of KUBOTA diesel engine are designated as shown in the figure. The sequence of cylinder numbers is given as No.1, No.2. No.3 and No.4 starting from the gear case side.
Page 20: 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 21: Handling Precautions For Electrical Parts And Wiring
GENERAL B2650HSDC, B3350HSDC, 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 22 GENERAL B2650HSDC, B3350HSDC, 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 23: Battery
GENERAL B2650HSDC, B3350HSDC, 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 24: Handling Of Circuit Tester
GENERAL B2650HSDC, B3350HSDC, 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 25: Color Of Wiring
GENERAL B2650HSDC, B3350HSDC, 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 26: Lubricants, Fuel And Coolant
NLGI-2 or NLGI-1 Speed control pedal (GC-LB) Battery terminal Moderate amount NOTE • The product name of KUBOTA genuine UDT fluid may be different from that in the Operator's Manual depending on countries or territories. 9Y1210822GEG0003US0 KiSC issued 05, 2014 A...
Page 27 • No.2-D is a distillate fuel of lower volatility for engines 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 deliveries superior performance and protection in all operating conditions.
Page 28: Tightening Torques
GENERAL B2650HSDC, B3350HSDC, WSM 5. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Tighten screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual according to the table below. Indication on top of bolt No-grade or 4T...
Page 29: Metric Screws, Bolts And Nuts
GENERAL B2650HSDC, B3350HSDC, 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 30: Maintenance Check List
GENERAL B2650HSDC, B3350HSDC, WSM 6. MAINTENANCE CHECK LIST Indication on hour meter Refer- After Item ence since 50 100 150 200 250 300 350 400 450 500 550 600 650 700 800 page Clogging of air conditioner Clean Daily G-16...
Page 31 • 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 32: Check And Maintenance
GENERAL B2650HSDC, B3350HSDC, WSM 7. CHECK AND MAINTENANCE CAUTION • Be sure to check and service the tractor on a flat place with engine shut off, the parking brake on and chock the wheels. 9Y1210822GEG0006US0 [1] DAILY CHECK CAUTION To avoid personal injury: Take the following precautions when checking the tractor.
Page 33 GENERAL B2650HSDC, B3350HSDC, WSM Checking Coolant Level CAUTION To avoid personal injury: • Do not remove radiator cap while coolant is hot. When cool, slowly rotate cap to the first stop and allow sufficient time for excess pressure to escape before removing the cap completely.
Page 34 GENERAL B2650HSDC, B3350HSDC, WSM Cleaning Grill and Radiator Screen CAUTION To avoid personal injury: • Be sure to stop the engine and remove the key before removing the screen. 1. Check front grill and side screens to be sure they are clean of debris.
Page 35 GENERAL B2650HSDC, B3350HSDC, WSM Checking and Cleaning of Electrical Wiring and Battery Cables CAUTION To avoid personal injury: • 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 36: Check Points Of Initial 50 Hours
GENERAL B2650HSDC, B3350HSDC, WSM [2] CHECK POINTS OF INITIAL 50 HOURS Changing Engine Oil CAUTION To avoid personal injury: • Be sure to stop the engine before changing the oil. • Allow engine to cool down sufficiently, oil can be hot and can burn.
Page 37 2. After draining reinstall the drain plug. 3. Fill with new KUBOTA SUPER UDT fluid up to the upper notch the dipstick. 4. After running the engine for a few minutes, stop it and check the oil level again;...
Page 38: Check Points Of Every 50 Hours
GENERAL B2650HSDC, B3350HSDC, WSM [3] CHECK POINTS OF EVERY 50 HOURS Checking Engine Start System CAUTION To avoid personal injury: • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test do not operate the tractor.
Page 39: Check Points Of Every 100 Hours
GENERAL B2650HSDC, B3350HSDC, WSM Greasing 1. Apply a greasing to the following position as figures. (1) Grease Fitting (HST Pedal) (3) Grease Fitting (Lifting Rod R.H.) (2) Grease Fitting (Top Link) (4) Battery Terminal 9Y1210822GEG0026US0 Checking Wheel Mounting Nuts Tightening Torque NOTE •...
Page 40 GENERAL B2650HSDC, B3350HSDC, WSM 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 41 GENERAL B2650HSDC, B3350HSDC, WSM Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.
Page 42 GENERAL B2650HSDC, B3350HSDC, WSM Cleaning Air Cleaner Element 1. Remove the air cleaner cover (3) and primary element (2). 2. Clean the primary element if: • When dry dust adheres to the element, blow compressed air from the inside turning the element. Pressure of compressed air must be under 210 kPa (2.1 kgf/cm...
Page 43 GENERAL B2650HSDC, B3350HSDC, WSM Adjusting Fan Belt Tension CAUTION • Be sure to stop engine before checking belt tension. 1. Stop the engine and remove the key. 2. Apply moderate thumb pressure to belt between pulleys. 3. If tension in incorrect, loosen the alternator mounting bolts and,...
Page 44: Check Points Of Every 200 Hours
GENERAL B2650HSDC, B3350HSDC, WSM Checking Fuel Line 1. Check to see that all line and hose clamps are tight and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once. NOTE • If the fuel line is removed, be sure to properly bleed the fuel system.
Page 45 GENERAL B2650HSDC, B3350HSDC, WSM Checking Radiator Hose and Hose Clamp Check to see if radiator hoses are properly fixed every 200 hours of operation or six months, whichever comes first. 1. If hose clamps are loose or water leaks, tighten bands securely.
Page 46 GENERAL B2650HSDC, B3350HSDC, WSM Adjusting Air Conditioner Belt Tension CAUTION • Be sure to stop the engine before checking air conditioner belt tension. 1. Stop the engine and remove the key. 2. Apply 98 N (10 kgf, 22 lbf) pressure to the belt between the pulleys.
Page 47: Check Points Of Every 300 Hours
GENERAL B2650HSDC, B3350HSDC, WSM Cleaning Air Filter  Fresh Air Filter 1. Remove the knob bolts (3) and pull out the fresh air filter (1). 2. Blow air from the opposite direction to the filter's normal air flow. Pressure of compressed air must be under 205 kPa (2.1 kgf/cm...
Page 48 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 A : Oil level is acceptable within this (2) Drain Plug (Both Sides) range.
Page 49: Check Points Of Every 400 Hours
GENERAL B2650HSDC, B3350HSDC, WSM Changing Front Axle Case Oil 1. Park the tractor on a firm, flat and level surface. 2. To drain the used oil, remove the right and left drain plugs and filling plug at the front axle case and drain the oil completely into the oil pan.
Page 50: Check Points Of Every 1 Year
GENERAL B2650HSDC, B3350HSDC, WSM [11] CHECK POINTS OF EVERY 1 YEAR Replacing Air Cleaner Primary Element and Secondary Element • See page G-25. IMPORTANT • To prevent serious damage to the engine, use only a KUBOTA genuine filter. 9Y1210822GEG0052US0 Checking the Air Conditioner Pipe and Hose 1.
Page 51: Check Points Of Every 2 Years
GENERAL B2650HSDC, B3350HSDC, WSM [12] CHECK POINTS OF EVERY 2 YEARS Flushing Cooling System and Changing Coolant CAUTION • Do not remove the 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 52 GENERAL B2650HSDC, B3350HSDC, WSM (Continued)  Anti-Freeze CAUTION • When using antifreeze, put on some protection such as rubber gloves (Antifreeze contains position.). • If should drink antifreeze, throw up at once and take medical attention. • When antifreeze comes in contact with the skin or clothing, wash it off immediately.
Page 53: 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 54 GENERAL B2650HSDC, B3350HSDC, WSM Draining Clutch Housing Water NOTE • The tractor is equipped with a water drain plug (1) under the clutch housing. • After operating in rain, snow or tractor has been washed, water may get into the clutch housing.
Page 55 GENERAL B2650HSDC, B3350HSDC, WSM (Continued) [B3350] Fuse No. Capacity (A) Protected circuit Work Light Defogger Radio / Dome Light Aircon Blower Wiper Aircon Radio Starter Relay / ECU Glow Relay (10) Outlet (Rear) (11) Panel (12) Outlet (Front) (13) Flasher / Hazard...
Page 56 GENERAL B2650HSDC, B3350HSDC, WSM Replacing Light Bulb 1. Head lights: Take the bulb out of the light body and replace with a new one. 2. Other lights: Detach the lens and replace the bulb. Light Capacity Head light 23 W...
Page 57 GENERAL B2650HSDC, B3350HSDC, WSM Lubricating Points 1. Lubricate the door hinges (1) and the rear window hinges (2) with a proper amount of grease. (1) Door Hinge (2) Rear Window Hinge 9Y1210822GEG0065US0 Adding Washer Liquid 1. Add a proper amount of automobile washer liquid.
Page 58: Special Tools
GENERAL B2650HSDC, B3350HSDC, 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 59 GENERAL B2650HSDC, B3350HSDC, WSM Oil Pressure Tester Code No. • 07916-32032 Application • Use to measure lubricating oil pressure. (1) Gauge (5) Adaptor 2 (2) Cable (6) Adaptor 3 (3) Threaded Joint (7) Adaptor 4 (4) Adaptor 1 (8) Adaptor 5...
Page 60 GENERAL B2650HSDC, B3350HSDC, WSM Plastigauge Code No. • 07909-30241 Application • Use to check the oil clearance between crankshaft and bearing, etc.. Measuring range • Green: 0.03 to 0.07 mm (0.001 to 0.003 in.) • Red: 0.05 to 0.1 mm (0.002 to 0.006 in.) •...
Page 61 GENERAL B2650HSDC, B3350HSDC, WSM NOTE • The following special tools are not provided, so make them referring to the figure. 9Y1210822GEG0068US0 Injection Pump Pressure Tester Application • Use to check fuel tightness of injection pumps. Pressure gauge full scale: More than 29.4 MPa (300 kgf/cm...
Page 62 GENERAL B2650HSDC, B3350HSDC, WSM Valve Guide Replacing Tool Application • Use to press out and press in the valve guide. 225 mm (8.86 in.) 70 mm (2.8 in.) 45 mm (1.8 in.) 20 mm dia. (0.79 in. dia.) 11.7 to 11.9 mm dia. (0.461 to 0.468 in. dia.) 6.50 to 6.60 mm dia.
Page 63 GENERAL B2650HSDC, B3350HSDC, WSM Flywheel Stopper Application • Use to loosen and tighten the flywheel screw. 20 mm (0.79 in.) 15 mm (0.59 in.) 10 mm dia. (0.39 in. dia.) 30 mm (1.2 in.) 8.0 mm (0.31 in.) 200 mm (7.87 in.)
Page 64 GENERAL B2650HSDC, B3350HSDC, WSM Socket Application • Use to loosen and tighten the idle gear 2 bearing lock nut. 28.5 to 28.8 mm (1.12 to 1.13 in.) 3.5 to 3.7 mm (0.14 to 0.15 in.) 28.5 to 28.8 mm (0.12 to 1.13 in.) 38 mm dia.
Page 65 GENERAL B2650HSDC, B3350HSDC, WSM Rotation Sensor Signal Interface Unit Application • Use for reading rotation sensor signal. NOTE • This special tool is not provided, so make it referring to the figure. (1) 9V Battery (4) LED for Panasonic (a) +9 V...
Page 66: Special Tools For Tractor
GENERAL B2650HSDC, B3350HSDC, 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 Steering Wheel Puller Code No. • 07916-51090 Application • Use to remove the steering wheel without damage to the steering shaft.
Page 67 GENERAL B2650HSDC, B3350HSDC, WSM Flow Meter Code No. • 07916-52791 (Flow Meter) • 07916-52651 (Hydraulic Test Hose) Application • This allows easy testing of hydraulic system. (1) Flow Meter (2) Hydraulic Test Hose WSM000001GEG0036US0 Adaptor Set for Flow Meter Code No.
Page 68 GENERAL B2650HSDC, B3350HSDC, WSM Independent PTO Clutch Spring Compression Tool Application • Use for compressing the spring into the spline boss. 12 mm (0.47 in.) 25.4 mm (1.00 in.) 19 mm (0.75 in.) Hex. 2.7 mm (0.11 in.) 8 mm (0.31 in.) 15 mm dia.
Page 69 GENERAL B2650HSDC, B3350HSDC, WSM Check and High Pressure Relief Valve Assembly Tool Application • Use for readjusting relief valve pressure. 30 mm (1.2 in.) Chamfer 0.4 mm (0.02 in.) 0.17 rad (10 °) 21 mm (0.83 in.) Chamfer 3 mm (0.1 in.) Chamfer 0.3 mm (0.01 in.)
Page 70: Special Tools For Cabin
GENERAL B2650HSDC, B3350HSDC, WSM [3] SPECIAL TOOLS FOR CABIN NOTE • Special tools for R134a refrigerant air conditioning system below are available from DENSO CO. LTD. M00000002GEG0111US1 Air Conditioner Service Tool Code No. • DENSO 95048-00063 Application • Use for charge, test or discharge of the air conditioning system.
Page 71 GENERAL B2650HSDC, B3350HSDC, WSM Stopper Bolt (for A/C Compressor) Application • Use with the stopper magnetic clutch. NOTE • This special tool is not provided, so make it referring to the figure. 12 mm (0.47 in.) 35 mm (1.38 in.) 7 mm (0.28 in.)
Page 72 GENERAL B2650HSDC, B3350HSDC, WSM Stopper Magnetic Clutch (For A/C Compressor) Application • Use for loosening and tightening the magnetic clutch mounting nut. (Use radius C) NOTE • This special tool is not provided, so make it referring to the figure.
Page 73: Tires
• Always maintain the correct tire pressure. Do not inflate tires above the recommended pressure shown in the operator's manual. IMPORTANT • Do not use tires other than those approved by KUBOTA. 9Y1210822GEG0081US0 Inflation Pressure Through the tire pressure is factory-set to the prescribed level, it naturally drops slowly in the course of time.
Page 74: Tread Adjustment
GENERAL B2650HSDC, B3350HSDC, WSM [2] TREAD ADJUSTMENT CAUTION • Support tractor securely on stands before removing a wheel. • Never operate tractor with a loose rim, wheel or axle. IMPORTANT • Always attach tires as shown in the figure. • If not attached as the figure, transmission parts may be damaged.
Page 75: Ballast
GENERAL B2650HSDC, B3350HSDC, WSM [3] BALLAST CAUTION To avoid personal injury: • 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. • Do not fill the front wheels with liquid.
Page 76: Tire Liquid Injection
GENERAL B2650HSDC, B3350HSDC, WSM [4] TIRE LIQUID INJECTION Auxiliary weights can be used to increase traction force for plowing in fields or clayey grounds. Another way is to inject water or another liquid, such as a calcium chloride solution in the tires. Water must not be used in winter since it freezes at 0 °C (32 °F).
Page 77 GENERAL B2650HSDC, B3350HSDC, WSM Injection CAUTION • When a calcium chloride solution is used, cool it before pouring it into the tire. • Do not fill tires with water or solution more than 75 % of full capacity (to the valve stem level).
Page 78: 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 79 GENERAL B2650HSDC, B3350HSDC, WSM Implement Remarks B2650 / B3350 Max. cutting width 1830 mm (72 in.) Mid-mount Max. weight 205 kg (451 lbs) Max. cutting width 1220 mm (48 in.) Rotary-cutter (1 Blade) Max. weight 227 kg (500 lbs) Mower Max.
Page 80 ENGINE KiSC issued 05, 2014 A...
Page 81 MECHANISM CONTENTS 1. ENGINE BODY........................... 1-M1 [1] CLOSED BREATHER ......................1-M1 [2] HALF-FLOATING HEAD COVER ..................1-M1 [3] ENGINE CONTROL SYSTEM [V1505-T-E4] ............... 1-M2 [4] ELECTRONIC GOVERNOR [V1505-T-E4] ................1-M2 [5] GOVERNOR [D1305-E4] ..................... 1-M3 2. REFORMER AND AFTER TREATMENT DEVICES ..............1-M5 [1] REFORMING MECHANISM....................
Page 82: Engine Body
ENGINE B2650HSDC, B3350HSDC, 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 83: Engine Control System [V1505-T-E4]
ENGINE B2650HSDC, B3350HSDC, WSM [3] ENGINE CONTROL SYSTEM [V1505-T-E4] The ECU will use signal inputs, from the engine sensors, to control the fuel metering and speed control, while the engine is running. As well, the ECU will provide diagnostic control.
Page 84: Governor [D1305-E4]
ENGINE B2650HSDC, B3350HSDC, WSM [5] GOVERNOR [D1305-E4] 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 85 ENGINE B2650HSDC, B3350HSDC, 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 86: Reformer And After Treatment Devices
ENGINE B2650HSDC, B3350HSDC, WSM 2. REFORMER AND AFTER TREATMENT DEVICES [1] REFORMING MECHANISM (1) Reformer (6) Air Valve Exhaust Gas (2) Burner Glow (7) Heater Glow Fuel Primary Air (3) Turbocharger (8) Diesel Oxidation Catalyst Reformed Gas Secondary Air (4) Doser Fuel Pump...
Page 87: After Treatment Devices
ENGINE B2650HSDC, B3350HSDC, WSM [2] AFTER TREATMENT DEVICES Diesel Oxidation Catalyst (DOC) An oxidizing catalyst positioned in front of the Diesel Particulate Filter (DPF) step that uses reformer gas to actively regenerate the DPF. (1) Diesel Oxidation Catalyst (DOC) 9Y1210822ENM0010US0...
Page 88 ENGINE B2650HSDC, B3350HSDC, WSM Temperature Sensor Three temperature sensors are located on the DPF muffler and detects the DOC inlet exhaust temperature, DPF inlet exhaust temperature and DPF outlet exhaust temperature that is required for the after treatment system. And two temperature sensors are also located at the reformer housing.
Page 89 ENGINE B2650HSDC, B3350HSDC, WSM Air Blower Air blower is a motor drive type. Air blower is a device that supplies the primary air to the reforming catalyst through the air valve 1 when the DPF regeneration is conducted. And also air blower supplies the secondary air to the reformed gas through the air valve 2 when the exhaust temperature (DOC In) is lower than 250 °C...
Page 90 ENGINE B2650HSDC, B3350HSDC, WSM Doser Fuel Pump Doser fuel pump is a device that supplies the fuel to the reforming catalyst when the DPF regeneration is conducted. And also the doser fuel pump controls the fuel amount supplied to the reforming catalyst according to the engine operating condition.
Page 91 ENGINE B2650HSDC, B3350HSDC, WSM Auto Regeneration Switch Press the auto regeneration switch, and the Auto Mode and Inhibit Mode changes alternately. The tractor has been set to Inhibit Mode by default. When the main key switch is turned ON, the tractor will be in the Inhibit Mode.
Page 92: Dpf Regeneration System
ENGINE B2650HSDC, B3350HSDC, WSM [3] DPF REGENERATION SYSTEM (1) Regeneration Mode (Inhibit Version) This system has "Auto Regeneration Mode" in which the DPF can regenerate automatically while working, "Inhibit Mode" in which the auto regeneration is inhibited and "Parked Regeneration Mode" in which the DPF regenerates while the tractor is parked.
Page 93: Indicator And Switch Lamp (Inhibit Version)
ENGINE B2650HSDC, B3350HSDC, WSM (2) Indicator and Switch Lamp (Inhibit Version) (1) Auto Regeneration Switch (3) Regeneration Indicator (4) DPF Warning Indicator (5) Parked Regeneration (2) Parked Regeneration Switch Indicator Indicator and Lamp state Engine condition switch lamp Inhibit Mode activated.
Page 94: Pm Warning Level (Inhibit Version)
ENGINE B2650HSDC, B3350HSDC, WSM (3) PM Warning Level (Inhibit Version) PM warning level 0 to 5 as shown below is programmed according to the amount of accumulated PM to prompt the operator to perform the required procedure in each level.
Page 95 ENGINE B2650HSDC, B3350HSDC, WSM Inhibit Mode Engine Warning Buzzer output Remark level limitation Normal operation, Regeneration is not required.      limitation Regeneration is required, but Auto Regeneration is not      limitation possible.
Page 96 ENGINE B2650HSDC, B3350HSDC, WSM DOC Mode Occurrence condition of DOC Remark regeneration Condition 1 DOC Regeneration is required.      Three times DPF regeneration are Condition for DOC Regeneration is satisfied.      completed from last time DOC Under the preparation for DOC Regeneration.
Page 97: Regeneration Mode (Default Version)
ENGINE B2650HSDC, B3350HSDC, WSM (4) Regeneration Mode (Default Version) DPF regeneration process can be performed by choosing from "Auto Regeneration" or "Regeneration inhibit" mode according to your job conditions. For jobs not affected by hot gases emitted during regeneration, the "Auto Regeneration"...
Page 98: Indicator And Switch Lamp (Default Version)
ENGINE B2650HSDC, B3350HSDC, WSM (5) Indicator and Switch Lamp (Default Version) (1) Parked Regeneration Switch (3) Engine Warming Indicator (4) Regeneration Indicator (5) Parked Regeneration (2) DPF INHIBIT Switch Indicator Indicator and Lamp state Engine condition switch lamp Auto Regeneration Mode activated.
Page 99: Warning Level (Default Version)
ENGINE B2650HSDC, B3350HSDC, WSM (6) Warning Level (Default Version) PM warning level 0 to 5 as shown below is programmed according to the amount of accumulated PM to prompt the operator to perform the required procedure in each level. • Level 0: Normal operation. Regeneration is not required.
Page 100 ENGINE B2650HSDC, B3350HSDC, WSM Inhibit Mode Engine Warning Buzzer output Remark level limitation Normal operation, Regeneration is not required.      limitation Regeneration is required, but Auto Regeneration is not      limitation permitted. Parking Regeneration is not possible.
Page 101 ENGINE B2650HSDC, B3350HSDC, WSM DOC Mode Occurrence condition of DOC Remark regeneration Condition 1 DOC Regeneration is required. This indication switch to the Three times DPF regeneration are following if release the DPF inhibit switch in the state of ...
Page 102 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-S15 (3) Cooling System ......................1-S15 (4) Fuel System........................1-S17 (5) Turbocharger (V1505-T-E4) ..................1-S20 [2] DISASSEMBLING AND ASSEMBLING ................1-S21...
Page 103: Troubleshooting
ENGINE B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Engine Does Not No fuel Fill fuel – Start Air in the fuel system Bleed G-36 Water in the fuel system Change fuel and – repair or replace fuel...
Page 104 ENGINE B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page Engine Revolution Is Fuel filter clogged or dirty Replace G-32 Not Smooth Air cleaner clogged Clean or replace G-25 Fuel leak due to loose injection pipe retaining nut Tighten retaining nut –...
Page 105 ENGINE B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page Deficient Output Incorrect injection timing Adjust 1-S17 Engine's moving parts seem to be seizing Repair or replace – Injection pump malfunctioning Repair or replace 1-S34 Uneven fuel injection Replace injection...
Page 106 ENGINE B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page High Oil Pressure Different type of oil Use specified type of Relief valve damaged Replace – Engine Overheated Engine oil insufficient Fill G-19 Fan belt broken or elongated Replace or adjust...
Page 107: Servicing Specifications
ENGINE B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS ENGINE BODY Item Factory Specification Allowable Limit Valve Clearance (Cold) 0.145 to 0.185 mm – 0.00571 to 0.00728 in. Compression Pressure D1305-E4 3.73 to 4.11 MPa 2.26 MPa 38.0 to 42.0 kgf/cm 23.0 kgf/cm...
Page 108 ENGINE B2650HSDC, B3350HSDC, WSM Item Factory Specification Allowable Limit Rocker Arm Shaft to Rocker Arm Oil 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 109 ENGINE B2650HSDC, B3350HSDC, WSM Item Factory Specification Allowable Limit Cam Height Intake 28.80 mm 28.75 mm 1.134 in. 1.132 in. Exhaust 29.00 mm 28.95 mm 1.142 in. 1.140 in. Camshaft Journal to Cylinder Block Bore Oil Clearance 0.050 to 0.091 mm 0.15 mm...
Page 110 ENGINE B2650HSDC, B3350HSDC, WSM Item Factory Specification Allowable Limit Crankshaft Journal to Crankshaft Bearing 1 Oil Clearance 0.0340 to 0.114 mm 0.20 mm [V1505-T-E4] 0.00134 to 0.00448 in. 0.0079 in. • Crankshaft Journal O.D. 47.934 to 47.950 mm – 1.8872 to 1.8877 in.
Page 111 ENGINE B2650HSDC, B3350HSDC, WSM LUBRICATING SYSTEM Item Factory Specification Allowable Limit Engine Oil Pressure At Idle Speed 49 kPa – 0.50 kgf/cm 7.1 psi At Rated Speed 197 to 441 kPa 147 kPa 2.00 to 4.50 kgf/cm 1.50 kgf/cm 28.57 to 64.0 psi 21.3 psi...
Page 112 ENGINE B2650HSDC, B3350HSDC, WSM FUEL SYSTEM Item Factory Specification Allowable Limit Injection Pump [D1305-E4] Injection Timing 0.2662 to 0.2923 rad – [2600 min (rpm)] (15.25 to 16.75 °) before T.D.C. [V1505-T-E4] Injection Timing 0.2837 to 0.3097 rad – [3000 min (rpm)] (16.25 to 17.75 °)
Page 113: Tightening Torques
ENGINE B2650HSDC, B3350HSDC, WSM 3. TIGHTENING TORQUES [1] TRACTOR SECTION Tightening torque of screws, bolts and nuts on the table below are specially specified. (For general use screws, bolts and nuts : See page G-11.) Item N·m kgf·m lbf·ft Muffler mounting nut 23.5 to 30.0...
Page 114: Checking, Disassembling And Servicing
ENGINE B2650HSDC, B3350HSDC, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Engine Body Compression Pressure 1. Run the engine until it is warmed up. 2. Stop the engine. 3. Remove the air cleaner, the muffler, DPF and all glow plugs (or nozzles).
Page 115 ENGINE B2650HSDC, B3350HSDC, WSM Valve Clearance IMPORTANT • Valve clearance must be checked and adjusted when engine is cold. 1. Open the bonnet and disconnect the battery negative cable. 2. Remove the hose clamp (2). Disconnect the inlet hose (2).
Page 116 ENGINE B2650HSDC, B3350HSDC, WSM (Continued) NOTE • The "TC" marking line on the flywheel is just for No. 1 cylinder. There is no "TC marking for the other cylinders. • No. 1 piston comes to the T.D.C.position when the "TC"...
Page 117: Lubricating System
ENGINE B2650HSDC, B3350HSDC, 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 118 ENGINE B2650HSDC, B3350HSDC, 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 119: Fuel System
ENGINE B2650HSDC, B3350HSDC, WSM Radiator Water Leakage 1. Pour a specified amount of water into the radiator. 2. Set a radiator tester (1) and an adaptor (2) and raise the water pressure to the specified pressure. 3. Check the radiator for water leaks.
Page 120 5. Set the speed control lever to the maximum speed position. 6. Run 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 121 ENGINE B2650HSDC, B3350HSDC, 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 122: Turbocharger (V1505-T-E4)
ENGINE B2650HSDC, B3350HSDC, WSM Nozzle Holder 1. Secure the nozzle retaining nut (7) with a vise. 2. Remove the nozzle holder (1) and inside parts. (When reassembling) • Assemble the nozzle in clean fuel oil. • Install the push rod (4), noting its direction.
Page 123: Disassembling And Assembling
ENGINE B2650HSDC, B3350HSDC, WSM Radial Clearance 1. If the wheel contact to the housing, replace the turbocharger assembly with new one. 9Y1210822ENS0051US0 [2] DISASSEMBLING AND ASSEMBLING (1) DPF Muffler Bonnet 1. Open the bonnet (1) and disconnect the battery negative cable.
Page 124: Separating Engine From Clutch Housing
ENGINE B2650HSDC, B3350HSDC, WSM DPF Muffler 1. Disconnect the connectors (1). 2. Remove the muffler mounting nuts (2). 3. Remove the muffler mounting bolts (3) to muffler mount bracket. 4. Remove the DPF muffler (4). (When reassembling) IMPORTANT • When assembling DPF muffler to muffler mount bracket, be sure the following procedure.
Page 125 ENGINE B2650HSDC, B3350HSDC, WSM Draining Transmission Fluid 1. Place an oil pan underneath the transmission case, and remove the drain plugs (1) and (2). 2. Drain the transmission fluid. 3. Reinstall the drain plugs (1) and (2). (When refilling) • Fill new oil from filling port after removing the filling plug (4) up to the upper notch on the dipstick (3).
Page 126 ENGINE B2650HSDC, B3350HSDC, WSM Bonnet 1. Open the bonnet (1) and disconnect the battery negative cable. 2. Disconnect the connector for head light and remove the clamp (2). 3. Remove the snap pin (3). 4. Remove the bonnet (1). (1) Bonnet...
Page 127 ENGINE B2650HSDC, B3350HSDC, WSM Compressor, Condenser and Receiver 1. Loosen the tension pulley mounting nut (1) and turn the adjusting bolt (2) counterclockwise then remove the air conditioner belt (3). 2. Disconnect the 1P connector (4) from the compressor. 3. Remove the compressor mounting bracket (5) with compressor.
Page 128 ENGINE B2650HSDC, B3350HSDC, WSM Hoses and Wire Harness (Left Side) 1. Disconnect the power steering hose (both side) (1) from power steering cylinder. 2. Disconnect the connector (2). (When reassembling) 24 to 28 N·m Power steering hose (left Tightening torque 2.5 to 2.8 kgf·m...
Page 129: Separating Engine From Front Axle Frame
ENGINE B2650HSDC, B3350HSDC, WSM Propeller Shaft and Sub Frame 1. Slide the propeller shaft cover (1) after loosen joints (2). 2. Remove the sub frame (3). (When reassembling) NOTE • Apply grease to the coupling and splines. 80 to 90 N·m Sub frame mounting bolt 8.2 to 9.1 kgf·m...
Page 130: External Components
ENGINE B2650HSDC, B3350HSDC, WSM (4) External Components Outer Components CAUTION • While the engine is running and or just after it stops, the turbocharger is hot, be careful not to touch the turbocharger. NOTE • When removing and attaching the turbocharger assembly, be very careful not to allow dust, dirt and other foreign matters in the oil pipes.
Page 131: Cylinder Head And Valve
ENGINE B2650HSDC, B3350HSDC, WSM (5) Cylinder Head and Valve Cylinder Head Cover 1. Disconnect the breather hose (1). 2. Remove the cylinder head cover screw (2). 3. Remove the cylinder head cover (3). (When reassembling) • Check to see if the cylinder head cover gasket is not damaged.
Page 132 ENGINE B2650HSDC, B3350HSDC, WSM Nozzle Holder Assembly and Glow Plug 1. Remove the overflow pipe (1). 2. Remove the nozzle holder assemblies (4). 3. Remove the copper gasket (5) and heat seal (6). 4. Remove the lead (2) from the glow plugs (3).
Page 133 ENGINE B2650HSDC, B3350HSDC, WSM Rocker Arm and Push Rod 1. Remove the rocker arm bracket screws / nuts. 2. Remove the rocker arm assembly (1). 3. Remove the push rods (2). (When reassembling) • When putting the push rods (2) onto the tappets (3), check to see if their ends are properly engaged with the dimples.
Page 134 ENGINE B2650HSDC, B3350HSDC, WSM Cylinder Head and Cylinder Head Gasket 1. Loosen the pipe clamps (1), and remove the water return pipe (2). 2. Remove the cylinder head screw in the order of (n or r) to (a) and remove the cylinder head.
Page 135: Gear Case And Timing Gears
ENGINE B2650HSDC, B3350HSDC, WSM Tappets 1. Remove the tappets (1) from the crankcase. (When reassembling) • Visually check the contact between tappets and cams for proper rotation. If problem is found, replace tappets. • Before installing the tappets, apply engine oil thinly around them.
Page 136 ENGINE B2650HSDC, B3350HSDC, WSM Gear Case 1. Remove the fuel feed pump. 2. Remove the gear case. (When reassembling) • Grease thinly to the oil seal, and install it, ensuring the lip does not come off. (1) Gear Case Bolt Length = 65 mm (2.6 in.) Bolt Length = 68 mm (2.7 in.)
Page 137 ENGINE B2650HSDC, B3350HSDC, WSM Injection Pump [V1505-T-E4] 1. Remove the solenoid and rack sensor. 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 138 ENGINE B2650HSDC, B3350HSDC, WSM Cam Gear, Idle Gear 1, 2 and Governor Gear 1. Remove the lock nut (13) and the bearing nut (14). (See page G-47.) 2. Remove the idle gear 2 (3) and the Idle gear 1 (5).
Page 139: Piston And Connecting Rod
ENGINE B2650HSDC, B3350HSDC, WSM (7) Piston and Connecting Rod Oil Pan and Oil Strainer (for Standard Oil Pan) 1. Remove the oil pan mounting screws (5). 2. Remove the oil pan (4). 3. Remove the oil strainer (3). (When reassembling) •...
Page 140 ENGINE B2650HSDC, B3350HSDC, WSM Pistons 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 141 ENGINE B2650HSDC, B3350HSDC, 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) • When installing the ring, assemble the rings so that the manufacturer's mark (12) near the gap faces the top of the piston.
Page 142: Flywheel And Crankshaft
ENGINE B2650HSDC, B3350HSDC, WSM (8) Flywheel and 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 outer surface of the flywheel horizontally with the alignment mark (b) on the rear end plate.
Page 143 ENGINE B2650HSDC, B3350HSDC, WSM Crankshaft Assembly [D1305-E4] 1. Remove the main bearing case screw 2. 2. Turn the crankshaft to set the crankpin of the third cylinder to the A. Then draw out the crankshaft until the crankpin of the second cylinder comes to the center of the third cylinder.
Page 144 ENGINE B2650HSDC, B3350HSDC, WSM Main Bearing Case Assembly [D1305-E4] 1. Remove the two main bearing case screws 1 (2) of each main bearing cases. 2. Remove the main bearing case from crankshaft. (When reassembling) • Clean the oil passage in the main bearing cases.
Page 145 ENGINE B2650HSDC, B3350HSDC, WSM Main Bearing Case Assembly [V1505-T-E4] 1. Remove the two main bearing case screws 1 (5), and remove the main bearing case assembly 1 (1), being careful with crankshaft bearing 3 (7). 2. Remove the main bearing case assembly 2 (2), the main bearing case assembly 3 (3) and the main bearing case assembly (4) as above.
Page 146: Servicing
ENGINE B2650HSDC, B3350HSDC, WSM [3] SERVICING (1) Cylinder Head and Valve Top Clearance 1. Remove the cylinder head. 2. With the piston at TDC, use grease to affix three or four plastigauges (1) of a diameter 1.5 mm (0.059 in.) × 5.0 to 7.0 mm (0.20 to 0.27 in.) long to the crown of the piston;...
Page 147 ENGINE B2650HSDC, B3350HSDC, 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 148 ENGINE B2650HSDC, B3350HSDC, WSM Replacing Valve Guide (When removing) 1. Press out the used valve guide using a valve guide replacing tool. (See page G-45.) (When installing) 1. Clean a new valve guide and valve guide bore, and apply engine oil to them.
Page 149 ENGINE B2650HSDC, B3350HSDC, WSM Correcting Valve and Valve Seat NOTE • Before correcting the valve and 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 150 ENGINE B2650HSDC, B3350HSDC, 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 151: Timing Gears, Camshaft And Governor Gear
ENGINE B2650HSDC, B3350HSDC, 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 152 ENGINE B2650HSDC, B3350HSDC, WSM Governor Gear Backlash 0.0300 to 0.117 mm Factory specification Backlash between 0.00119 to 0.00460 in. injection pump gear and 0.15 mm governor gear Allowable limit 0.0059 in. 0.030 to 0.117 mm Factory specification (equipped with idle gear 0.0012 to 0.00460 in.
Page 153 ENGINE B2650HSDC, B3350HSDC, WSM Cam Height 1. Measure the height of the cam at its highest point with an outside micrometer. 2. If the measurement is less than the allowable limit, replace the camshaft. 28.80 mm Factory specification 1.134 in.
Page 154: Piston And Connecting Rod
ENGINE B2650HSDC, B3350HSDC, WSM Replacing Idle Gear Bushing (When removing) 1. Press out the used idle gear bushing using an idle gear bushing replacing tool. (See page G-45.) (When installing) 1. Clean a new idle gear bushing and idle gear bore, and apply engine oil to them.
Page 155 ENGINE B2650HSDC, B3350HSDC, WSM Replacing Small End Bushing (When removing) 1. Press out the used bushing using a small end bushing replacing tool. (See page G-45.) (When installing) 1. Clean a new small end bushing and bore, and apply engine oil to them.
Page 156 ENGINE B2650HSDC, B3350HSDC, 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 157: Crankshaft
ENGINE B2650HSDC, B3350HSDC, WSM (4) Crankshaft Crankshaft Side Clearance 1. Set a dial indicator with its point on the end of the crankshaft. 2. Move the crankshaft to the front and rear to measure the side clearance. 3. If the measurement is more than the allowable limit, replace the thrust bearings.
Page 158 ENGINE B2650HSDC, B3350HSDC, 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 159 ENGINE B2650HSDC, B3350HSDC, 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 160 ENGINE B2650HSDC, B3350HSDC, WSM Replacing Crankshaft Bearing 1 (When removing) 1. Press out the used crankshaft bearing 1 using a crankshaft bearing 1 replacing tool. (See page G-46.) (When installing) 1. Clean a new crankshaft bearing 1 and crankshaft journal bore, and apply engine oil to them.
Page 161 ENGINE B2650HSDC, B3350HSDC, 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 bearing case screws 1 to the specified torque, and remove the bearing case again.
Page 162 ENGINE B2650HSDC, B3350HSDC, WSM (Continued) (Reference) • Undersize dimensions of crankshaft journal [D1305-E4] 0.20 mm 0.40 mm Undersize 0.0079 in. 0.016 in. 2.3 to 2.7 mm radius 2.3 to 2.7 mm radius Dimension A 0.091 to 0.10 in. radius 0.091 to 0.10 in. radius 1.0 to 1.5 mm relief...
Page 163: Cylinder
ENGINE B2650HSDC, B3350HSDC, 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 164: Oil Pump
ENGINE B2650HSDC, B3350HSDC, WSM (6) Oil Pump Rotor Lobe Clearance 1. Measure the clearance between lobes of the inner rotor and the outer rotor with a feeler gauge. 2. If the clearance exceeds the factory specifications, replace the oil pump rotor assembly.
Page 165 TRANSMISSION KiSC issued 05, 2014 A...
Page 166 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. CRUISE CONTROL........................2-M14 [1] CRUISE CONTROL LINKAGE ................... 2-M14 (1) Cruise Control.......................
Page 167: Structure
TRANSMISSION B2650HSDC, B3350HSDC, 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 9Y1210822TRM0001US0 2-M1 KiSC issued 05, 2014 A...
Page 168: Front Case
TRANSMISSION B2650HSDC, B3350HSDC, WSM 2. FRONT CASE In this tractor, clutch disc is not installed. The steel plate (3) is installed on the flywheel (1). Power from the engine is transmitted through the steel plate (3) to the clutch shaft (4) and HST pump shaft.
Page 169: Hydrostatic Transmission
TRANSMISSION B2650HSDC, B3350HSDC, 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 170 TRANSMISSION B2650HSDC, B3350HSDC, 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) Retainer Plate (13) Valve Plate (6) Thrust Collar (14) Check and High Pressure...
Page 171: Pump And Motor
TRANSMISSION B2650HSDC, B3350HSDC, 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 172: Oil Flow And Valves
TRANSMISSION B2650HSDC, B3350HSDC, 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 (for 3-points (3) Cylinder Block (for Pump)
Page 173 TRANSMISSION B2650HSDC, B3350HSDC, 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 174 TRANSMISSION B2650HSDC, B3350HSDC, WSM Neutral (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump (for Power A : Pump A Port (2) Swashplate Relief Valve (for Reverse) Steering, Independent PTO, B : Pump B Port...
Page 175 TRANSMISSION B2650HSDC, B3350HSDC, 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 176 TRANSMISSION B2650HSDC, B3350HSDC, WSM Forward (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump (for Power A : Pump A Port (2) Swashplate Relief Valve (for Reverse) Steering, Independent PTO, B : Pump B Port...
Page 177 TRANSMISSION B2650HSDC, B3350HSDC, 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 178 TRANSMISSION B2650HSDC, B3350HSDC, WSM Reverse (1) Oil Filter Cartridge (for HST) (8) Check and High Pressure (14) Hydraulic Pump (for Power A : Pump A Port (2) Swashplate Relief Valve (for Reverse) Steering, Independent PTO, B : Pump B Port...
Page 179: Control Linkage
TRANSMISSION B2650HSDC, B3350HSDC, 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 180: Cruise Control
TRANSMISSION B2650HSDC, B3350HSDC, WSM 4. CRUISE CONTROL [1] CRUISE CONTROL LINKAGE (1) Cruise Control (1) Cruise Control Lever (2) Cruise Link Lever (3) Cruise Rear Rod (4) Cruise Front Rod (5) Neutral Holder (6) HST Plate (7) Trunnion Shaft (8) HST Lever...
Page 181: Cruise Control Release
TRANSMISSION B2650HSDC, B3350HSDC, WSM (2) Cruise Control Release (1) Brake Pedal (2) Cruise Cable (3) Cruise Control Lever (4) Return Spring (5) Return Spring (6) Neutral Holder (7) Trunnion Shaft (8) HST Plate (9) HST Pedal Cruise control release is done by depressing the brake pedals (1).
Page 182: Range Gear Shift Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 19T shifter gear (10) are linked with range shift arm (3) and range shift fork (2) etc..
Page 183: Front Wheel Drive Section
TRANSMISSION B2650HSDC, B3350HSDC, WSM 6. FRONT WHEEL DRIVE SECTION Front wheel drive lever (1) is located at the front floor cover. Front wheel drive lever (1) and shifter (3) are linked. 19T shifter gear (5) is located on the front wheel drive shifter (4).
Page 184: Pto System
TRANSMISSION B2650HSDC, B3350HSDC, 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 (5). The PTO shift arm (2) and the rear PTO arm (3) linked with the rear PTO control plate (4).
Page 185: Rear Pto Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 (5). The control rod (5) pushes the range gear shifter arm (2).In this state, the PTO shift arm (2) shifts the PTO...
Page 186: Rear Pto / Mid-Pto Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 (5) pulls the PTO shift arm (2).
Page 187: Mid-Pto Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 (5). The control rod (5) pulls the PTO shift arm (2). In this state, the PTO shift arm (2) shifts the PTO shifter (7) reverse.
Page 188: Independent Pto
TRANSMISSION B2650HSDC, B3350HSDC, WSM (Continued) Power is transmitted from the independent PTO clutch to the Mid PTO shaft as follows. Independent PTO Clutch → PTO Shifter (7) → 26T Mid Gear (8) → 26T Gear (12) → 17T-26T Mid Gear (14) →...
Page 189: Independent Pto Control Valve
TRANSMISSION B2650HSDC, B3350HSDC, WSM (2) Independent PTO Control Valve Independent PTO control valve (2) is located at transmission case (1). The independent PTO control valve (2) consists of PTO arm (3), poppet (5), ball (7) and etc.. The PTO arm (3) is connected to control rod (4) and the independent PTO lever.
Page 190: Independent Pto Clutch
TRANSMISSION B2650HSDC, B3350HSDC, 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 191: Independent Pto Lever "Engaged
TRANSMISSION B2650HSDC, B3350HSDC, 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 192: Independent Pto Lever "Disengaged
TRANSMISSION B2650HSDC, B3350HSDC, 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 193: Differential Gear System
TRANSMISSION B2650HSDC, B3350HSDC, 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 194: Differential Lock
TRANSMISSION B2650HSDC, B3350HSDC, 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 195 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-S12 [2] PREPARATION ........................2-S13 (1) Separating Cabin From Tractor ..................2-S13 [3] DISASSEMBLING AND ASSEMBLING ................2-S18 (1) Separating Engine and Clutch Housing.................2-S18 (2) Front Case........................2-S19 (3) Hydraulic Transmission (HST)..................2-S20...
Page 196: Troubleshooting
TRANSMISSION B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING HYDROSTATIC TRANSMISSION Reference Symptom Probable Cause Solution Page System Will Not Oil level is low Check oil level or fill 2-S14 Operate in Either oil to proper level Direction Speed control pedal linkage damaged...
Page 197 TRANSMISSION B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page Loss of Power Oil level is low Check oil level or fill 2-S14 oil to proper level Speed control pedal linkage damaged Repair linkage 2-M13, 2-M15 Charge pressure is too low 1.
Page 198 TRANSMISSION B2650HSDC, B3350HSDC, WSM FRONT CASE Reference Symptom Probable Cause Solution Page Noise From Front Clutch shaft spline worn Replace 2-S19 Case Bearing Worn Replace 2-S19 TRANSMISSION CASE SECTION Reference Symptom Probable Cause Solution Page Noise From Front Transmission oil insufficient...
Page 199 TRANSMISSION B2650HSDC, B3350HSDC, WSM DIFFERENTIAL CASE SECTION Reference Symptom Probable Cause Solution Page Excessive or Unusual Improper backlash between spiral bevel pinion Adjust 2-S51 Noise at All Time and bevel gear Improper backlash between differential pinion Adjust 2-S50 and differential side gear...
Page 200: Servicing Specifications
TRANSMISSION B2650HSDC, B3350HSDC, 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 33 to 35 MPa –...
Page 201 TRANSMISSION B2650HSDC, B3350HSDC, WSM TRANSMISSION CASE AND DIFFERENTIAL GEAR Item Factory Specification Allowable Limit Shift Fork to Shifter Groove Clearance 0.1 to 0.35 mm 0.5 mm 0.004 to 0.014 in. 0.02 in. Differential case to Differential Side Gear Clearance 0.025 to 0.066 mm 0.30 mm...
Page 202: Tightening Torques
TRANSMISSION B2650HSDC, B3350HSDC, 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 : See page G-11.) Item N·m kgf·m lbf·ft Checking port plug 29 to 44 3.0 to 4.5...
Page 203: Checking, Disassembling And Servicing
TRANSMISSION B2650HSDC, B3350HSDC, 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 seat under cover and the floor mat.
Page 204 TRANSMISSION B2650HSDC, B3350HSDC, WSM High Pressure Relief Valve (Reverse) CAUTION • When checking, park the tractor on flat ground and fully engage the parking brake. 1. Remove the seat under cover and the floor mat. 2. Remove the plug from P1 port (reverse) (1).
Page 205 TRANSMISSION B2650HSDC, B3350HSDC, WSM High Pressure Relief Valve (Forward) CAUTION • When checking, park the tractor on flat ground and fully engage the parking brake. 1. Remove the seat under cover and the floor mat. 2. Remove the plug from P2 port (forward).
Page 206 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 207: Independent Pto Control Valve
TRANSMISSION B2650HSDC, B3350HSDC, WSM (2) Independent PTO Control Valve Independent PTO Control Valve Setting Pressure 1. Disconnect the OPC switch connector and remove the seat. 2. Disconnect the ECU connector and remove the plate (2) with ECU (1). 3. Remove the 3-point hitch lowering speed knob (3).
Page 208: Preparation
TRANSMISSION B2650HSDC, B3350HSDC, WSM [2] PREPARATION (1) Separating Cabin From Tractor Battery Cable 1. Open the bonnet and remove the side cover. 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 209 TRANSMISSION B2650HSDC, B3350HSDC, WSM Draining Transmission Fluid 1. Place an oil pan underneath the transmission case, and remove the drain plugs (1) and (2). 2. Drain the transmission fluid. 3. Reinstall the drain plugs (1) and (2). (When refilling) • Fill new oil from filling port after removing the filling plug (4) up to the upper notch on the dipstick (3).
Page 210 TRANSMISSION B2650HSDC, B3350HSDC, WSM Seat Under Cover 1. Disconnect the ECU connector (1) and seat under cover (2) with ECU (3). (1) ECU Connector (3) ECU (2) Seat Under Cover 9Y1210822HYS0013US0 HST Pedal and Floor Mat 1. Remove the HST pedal (1) and floor mat (2).
Page 211 TRANSMISSION B2650HSDC, B3350HSDC, WSM Front Loader Cables 1. Loosen the lock nuts (3) and remove the front loader cables (4). (When reassembling) • Set the lock lever (2) to lock position. • Fix the ball joint (1) first. • Adjust the length of the front loader cable (4) outer section so that the cable inner section has no play, and tighten the lock nut (3).
Page 212 TRANSMISSION B2650HSDC, B3350HSDC, WSM Cabin Mounting Bolts 1. Remove the bolts and nuts (1). (When reassembling) 124 to 150 N·m Cabin mounting bolt and Tightening torque 12.7 to 15.2 kgf·m 91.5 to 110 lbf·ft (1) Bolt and Nut 9Y1210822HYS0023US0 Cabin Assembly 1.
Page 213: Disassembling And Assembling
TRANSMISSION B2650HSDC, B3350HSDC, WSM Hydraulic Pipes and Others 1. Remove the transmission oil filter cartridge (1). 2. Disconnect the suction pipe (2) and delivery pipe (3). 3. Disconnect the loader valve pipes (4). (When reassembling) • Do not damage the O-rings of front loader valve pipes and delivery pipes.
Page 214: Front Case
TRANSMISSION B2650HSDC, B3350HSDC, WSM (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. (When reassembling) • Apply liquid gasket (Three Bond 1206D or equivalent) to the joint face of the engine and the front case.
Page 215: Hydraulic Transmission (Hst)
TRANSMISSION B2650HSDC, B3350HSDC, WSM Steel Plate 1. Remove the steel plate mounting bolts (1). 2. Remove the steel plate (2) from the flywheel. (When reassembling) • Apply liquid gasket (Three Bond 1206D or equivalent) to the joint face of the engine and the front case.
Page 216 TRANSMISSION B2650HSDC, B3350HSDC, 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 217 TRANSMISSION B2650HSDC, B3350HSDC, WSM Center Section 1 1. Remove the center section mounting hex. bolts (2). 2. Separate the HST housing (3) from the center section (1). (When reassembling) • Use a new gasket. • Install the poppet to the center section (1). Do not drop the spring (5).
Page 218 TRANSMISSION B2650HSDC, B3350HSDC, WSM Valve Plates 1. Pushing the valve plate (2) against the anchor pin (3), lift the valve plate (2) to remove. 2. Remove the valve plate (2). 3. Remove the valve plate (4). (When reassembling) • Install the groove (5) the valve plates (2), (4) to the anchor pins (3) securely.
Page 219 TRANSMISSION B2650HSDC, B3350HSDC, WSM Removing Neutral Valve 1. Remove the neutral valve (1) with the ratchet handle and the thin socket (27 mm). (When reassembling) 59 to 78 N·m Tightening torque Neutral valve body 6.1 to 7.9 kgf·m 44 to 57 lbf·ft...
Page 220 TRANSMISSION B2650HSDC, B3350HSDC, WSM Neutral Valve 1. Remove the pin (6) from the neutral valve body (4). 2. Remove the plug (10) with 2.5 mm hex. wrench (11). 3. Push the neutral valve (3) with 2.5 mm hex. wrench (11) not to damage it.
Page 221 TRANSMISSION B2650HSDC, B3350HSDC, WSM HST Housing Case Cylinder Blocks 1. Remove the cylinder blocks (1) (4) from the pump shaft (2) and the motor shaft (3). 2. Remove the circlip (5) and spring (6) from the cylinder block. (When reassembling) •...
Page 222 TRANSMISSION B2650HSDC, B3350HSDC, WSM Piston and Retainer Plate 1. Remove the pistons (3) with the retainer plates (1). (When reassembling) • Install the piston to its original position of the cylinder block. • Check the direction of the retainer plate (1) as shown in the picture.
Page 223 TRANSMISSION B2650HSDC, B3350HSDC, WSM Motor Shaft 1. Remove the internal circlip (5) from the HST housing. 2. Remove the cover with an O-ring. 3. Remove the motor shaft (2) with the ball bearing (6) from the HST housing. 4. Remove the external circlip from the motor shaft (2).
Page 224 TRANSMISSION B2650HSDC, B3350HSDC, WSM Trunnion Shaft 1. Remove the internal circlip (1) from the HST housing. 2. Remove the internal circlip (8) from the HST housing. 3. Strike out the trunnion shaft (2) slightly with a plastic hammer to the left side not to damage the O-rings (7) (4).
Page 225: Pto Clutch Case
TRANSMISSION B2650HSDC, B3350HSDC, 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 226: Bevel Pinion Shaft
TRANSMISSION B2650HSDC, B3350HSDC, WSM (5) Bevel Pinion Shaft Bevel Pinion Shaft 1. Remove the bevel pinion shaft assembly (1) from the transmission case. 2. Remove the spacer (2). (When reassembling) • Install the spacer (2) to the transmission case. • Install the bevel pinion shaft assembly (1).
Page 227 TRANSMISSION B2650HSDC, B3350HSDC, WSM Range Gear Shaft and Gears 1. Remove the ball bearing (5) from the range gear shaft (1). 2. Remove the 14T gear (4), the 18T (19T) gear (3) and the 26T (28T) gear (2). (When reassembling) •...
Page 228: Front Wheel Drive Shaft
TRANSMISSION B2650HSDC, B3350HSDC, 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 25T gear (3).
Page 229: Independent Pto Clutch Shifter
TRANSMISSION B2650HSDC, B3350HSDC, 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 230 TRANSMISSION B2650HSDC, B3350HSDC, WSM 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 231: Independent Pto Clutch
TRANSMISSION B2650HSDC, B3350HSDC, 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 232 TRANSMISSION B2650HSDC, B3350HSDC, WSM PTO Clutch Spring 1. Set the PTO clutch spring compressor (1) to the PTO clutch case (2). (See page G-51) 2. Tighten the nut and remove the external circlip (3). 3. Remove the spring collar (4) and the PTO clutch spring (5).
Page 233 TRANSMISSION B2650HSDC, B3350HSDC, 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 234 TRANSMISSION B2650HSDC, B3350HSDC, 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 235: Mid-Pto Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 236 TRANSMISSION B2650HSDC, B3350HSDC, 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 237: Differential Gear Section
TRANSMISSION B2650HSDC, B3350HSDC, 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 238 TRANSMISSION B2650HSDC, B3350HSDC, 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) • 0.2 mm (0.008 in.) shim •...
Page 239: Servicing
TRANSMISSION B2650HSDC, B3350HSDC, 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 240 TRANSMISSION B2650HSDC, B3350HSDC, WSM Piston Slipper and Retainer Plate 1. Check the slipper (1) for flatness. 2. If rounded, replace piston. 3. Measure the thickness of piston slipper. 4. If the measurement is less than the allowable limit, replace the piston.
Page 241 TRANSMISSION B2650HSDC, B3350HSDC, WSM Thrust Plates and Bearing Surface 1. Check the thrust plate (1) for scratches and excessive wear. 2. If worn or scored, replace it. 3. Check the bearing surface (2) of trunnion shaft (swashplate) (3) for scratches and excessive wear.
Page 242: Independent Pto Clutch
TRANSMISSION B2650HSDC, B3350HSDC, WSM Neutral Valve 1. Check the holes of the valve body (9) and the neutral valve (4) for clogging. 2. If clogged, open hole with compressed air. 3. Replace the O-rings (2), (6), (8) and the backup ring (7) for scratches and damage.
Page 243: Transmission Case
TRANSMISSION B2650HSDC, B3350HSDC, 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 244: Differential Gear
TRANSMISSION B2650HSDC, B3350HSDC, 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 245 TRANSMISSION B2650HSDC, B3350HSDC, 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 246 TRANSMISSION B2650HSDC, B3350HSDC, WSM Backlash between Spiral Bevel Pinion and Spiral Bevel Gear (1) Shim (2) Shim (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 247 REAR AXLE KiSC issued 05, 2014 A...
Page 248 MECHANISM CONTENTS 1. STRUCTURE..........................3-M1 KiSC issued 05, 2014 A...
Page 249 REAR AXLE B2650HSDC, B3350HSDC, WSM 1. STRUCTURE (1) Differential Gear Shaft (3) Ball Bearing (5) Rear Axle (7) Spiral Bevel Gear (2) 57T Spur Gear (4) Rear Axle Case (6) Differential Gear The rear axles are the semifloating type with ball bearings (3) between the rear axle (5) and the rear axle case (4), which supports the rear wheel load as well as transmitting power to the rear wheels.
Page 250 SERVICING CONTENTS 1. TROUBLESHOOTING.........................3-S1 2. TIGHTENING TORQUES......................3-S2 3. DISASSEMBLING AND SERVICING ..................3-S3 [1] DISASSEMBLING AND ASSEMBLING ................3-S3 (1) Separating Rear Axle Case .....................3-S3 (2) Disassembling Rear Axle Case ..................3-S5 [2] SERVICING ...........................3-S6 KiSC issued 05, 2014 A...
Page 251: Troubleshooting
REAR AXLE B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive or Unusual Improper backlash between differential gear Replace 2-S50, Noise at All Time shaft and final reduction gear 2-S51 Bearing worn Replace 3-S5, 4-S8 Insufficient or improper type of transmission fluid...
Page 252: Tightening Torques
REAR AXLE B2650HSDC, B3350HSDC, 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: See page G-11.) Item N·m kgf·m lbf·ft Rear wheel mounting nut 167 to 191 17 to 19.5...
Page 253: Disassembling And Servicing
REAR AXLE B2650HSDC, B3350HSDC, WSM 3. DISASSEMBLING AND SERVICING [1] DISASSEMBLING AND ASSEMBLING (1) Separating Rear Axle Case Draining Transmission Fluid 1. Place an oil pan underneath the transmission case, and remove the drain plugs (1) and (2). 2. Drain the transmission fluid.
Page 254 REAR AXLE B2650HSDC, B3350HSDC, WSM Rear Axle Case 1. Remove the brake rod (10). 2. Remove the front loader valve pipes (8), 3-point hitch delivery pipe 2 (7) and return hose (9). 3. Remove the pipe clamps, 3-point hitch delivery pipe 1 (4) and suction pipe (3).
Page 255: Disassembling Rear Axle Case
REAR AXLE B2650HSDC, B3350HSDC, WSM (2) Disassembling Rear Axle Case Differential Lock Shift Fork, Differential Lock Clutch (Right Side Only) 1. Remove the spring (1). 2. Draw out the differential lock shift fork (2) and differential lock clutch (3). (1) Spring...
Page 256: Servicing
REAR AXLE B2650HSDC, B3350HSDC, WSM [2] SERVICING Checking Ball Bearing 1. Hold the inner race, and push and pull the outer race in all directions to check for wear and roughness. 2. Apply transmission fluid to the bearing, and hold the inner race.
Page 257 BRAKES KiSC issued 05, 2014 A...
Page 258 MECHANISM CONTENTS 1. LINKAGE ............................ 4-M1 2. OPERATION..........................4-M2 KiSC issued 05, 2014 A...
Page 259 BRAKES B2650HSDC, B3350HSDC, WSM 1. LINKAGE (1) Parking Brake Lever (2) Brake Pedal (3) Spring (4) Brake Pedal Shaft (5) Brake Pedal Rod (6) Rear Axle Case (7) Brake Cam Lever (8) Brake Rod (9) Turnbuckle (10) Brake Lever 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 260 BRAKES B2650HSDC, B3350HSDC, 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 261 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) Brake Pedal ........................4-S4 (2) Separating Rear Axle Case .....................4-S6 (3) Disassembling Rear Axle Case ..................4-S8 [3] SERVICING ...........................4-S9 KiSC issued 05, 2014 A...
Page 262: Troubleshooting
BRAKES B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Uneven Braking Brake pedal free travel unevenly adjusted Adjust 4-S4 Force Brake disc worn Replace 4-S8 Cam plate warped Replace 4-S9 Brake Drags Brake pedal free travel too small...
Page 263: Servicing Specifications
BRAKES B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Brake Pedal Free Travel 30 to 40 mm – 1.2 to 1.5 in. Cam Plate and Bearing Holder Flatness – 0.30 mm 0.012 in. Cam Plate and Ball Height 22.89 to 22.99 mm...
Page 264: Tightening Torques
BRAKES B2650HSDC, B3350HSDC, 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: See page G-11.) Item N·m kgf·m lbf·ft Steering wheel mounting nut 30 to 49 3.0 to 5.0...
Page 265: Checking, Disassembling And Servicing
BRAKES B2650HSDC, B3350HSDC, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Adjusting Brake Pedal Free Travel CAUTION • Stop the engine and chock the wheels before checking brake pedal. • The difference between the right and left pedal free travel must be less than 5 mm (0.2 in.).
Page 266 BRAKES B2650HSDC, B3350HSDC, WSM Panel Lower Cover 1. Remove the panel lower cover (1). (1) Panel Lower Cover (2) Bolt 9Y1210822BRS0006US0 Meter Panel 1. Remove the meter panel mounting bolts and disconnect the each connectors. 2. Remove the meter panel (1).
Page 267: Separating Rear Axle Case
BRAKES B2650HSDC, B3350HSDC, WSM (2) Separating Rear Axle Case Draining Transmission Fluid 1. Place an oil pan underneath the transmission case, and remove the drain plugs (1) and (2). 2. Drain the transmission fluid. 3. Reinstall the drain plugs (1) and (2).
Page 268 BRAKES B2650HSDC, B3350HSDC, WSM Rear Axle Case 1. Remove the brake rod (10). 2. Remove the front loader valve pipes (8), 3-point hitch delivery pipe 2 (7) and return hose (9). 3. Remove the pipe clamps, 3-point hitch delivery pipe 1 (4) and suction pipe (3).
Page 269: Disassembling Rear Axle Case
BRAKES B2650HSDC, B3350HSDC, WSM (3) Disassembling Rear Axle Case Differential Lock Shift Fork, Differential Lock Clutch (Right Side Only), 57T Gear and Rear Axle 1. Remove the spring (1). 2. Draw out the differential lock shift fork (2) and differential lock clutch (3).
Page 270: Servicing
BRAKES B2650HSDC, B3350HSDC, WSM [3] SERVICING Brake Cam Lever Movement 1. Move the brake cam lever by hand to check the movement. 2. If the movement is heavy, refine the brake cam with emery paper. 9Y1210822BRS0013US0 Cam Plate Flatness and Bearing Holder Wear 1.
Page 271 FRONT AXLE KiSC issued 05, 2014 A...
Page 272 MECHANISM CONTENTS 1. STRUCTURE..........................5-M1 [1] 4 WHEEL DRIVE MODEL ....................5-M1 KiSC issued 05, 2014 A...
Page 273 FRONT AXLE B2650HSDC, B3350HSDC, WSM 1. STRUCTURE [1] 4 WHEEL DRIVE MODEL (1) Axle (7) Differential Yoke Shaft, LH (12) Differential Yoke Shaft, RH (17) Bevel Gear Shaft (7T) (2) Axle Flange (8) Front Axle Case (13) Front Axle Bracket, Rear...
Page 274 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 Assembly ..................5-S7 [3] SERVICING .........................5-S13 KiSC issued 05, 2014 A...
Page 275: Troubleshooting
FRONT AXLE B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Front Wheels Wander Tire pressure uneven Adjust G-56 to Right or Left Improper toe-in adjustment Adjust G-28 Clearance between front axle case boss and Replace 5-S16 front axle bracket bushing (front, rear) excessive...
Page 276: Servicing Specifications
FRONT AXLE B2650HSDC, B3350HSDC, 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 N – 5.1 to 10.2 kgf 11.3 to 22.4 lbf...
Page 277: Tightening Torques
FRONT AXLE B2650HSDC, B3350HSDC, 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: See page G-11.) Item N·m kgf·m lbf·ft Front wheel mounting nut 77 to 90 7.9 to 9.2...
Page 278: Checking, Disassembling And Servicing
FRONT AXLE B2650HSDC, B3350HSDC, 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 (A) - (B). 4. If the measurement is not within the factory specifications, adjust the tie-rod length.
Page 279: Disassembling And Assembling
4. Fill with new oil up to the upper notch on the dipstick. 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. (See page G-9.) 4.7 L Front axle case oil Capacity 5.0 U.S.qts...
Page 280 FRONT AXLE B2650HSDC, B3350HSDC, 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 281: Disassembling Front Assembly
FRONT AXLE B2650HSDC, B3350HSDC, WSM (2) Disassembling Front Assembly Front Axle Brackets and Tie-rod Joints 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 282 FRONT AXLE B2650HSDC, B3350HSDC, WSM Front Gear Case and Axle Flange 1. Remove the axle flange mounting bolts. 2. Remove the axle flange (2). (When reassembling) • Apply liquid gasket (Three Bond 1206D or equivalent) to joint face of the axle flange (2) and the front gear case (1) after eliminating the water, oil and stuck liquid gasket.
Page 283 FRONT AXLE B2650HSDC, B3350HSDC, WSM Bevel Gear Shaft and Bevel Gear Case Oil Seal 1. Remove the external circlip (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 284 FRONT AXLE B2650HSDC, B3350HSDC, WSM Bevel Gear Case Gears 1. Remove the internal circlip (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 285 FRONT AXLE B2650HSDC, B3350HSDC, 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 286 FRONT AXLE B2650HSDC, B3350HSDC, WSM Spiral Bevel Pinion Shaft and Differential Gear Assembly 1. Remove the oil seal from the front axle case. 2. Remove the internal circlip (2) and the collar (3). 3. Tap out the spiral bevel pinion shaft (4) to the rear side.
Page 287: Servicing
FRONT AXLE B2650HSDC, B3350HSDC, 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 288 FRONT AXLE B2650HSDC, B3350HSDC, WSM Backlash between Spiral Bevel Pinion Shaft and Spiral Bevel Gear 1. Place the wire of solder (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 289 FRONT AXLE B2650HSDC, B3350HSDC, WSM Backlash between 11T Bevel Gear and 16T Bevel Gear 1. Stick a strip of plastigauge or wire of solder 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 290 FRONT AXLE B2650HSDC, B3350HSDC, 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 291 STEERING KiSC issued 05, 2014 A...
Page 292 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT ....................... 6-M1 2. STEERING CONTROLLER......................6-M2 3. STEERING CYLINDER ......................6-M3 4. HYDRAULIC PUMP........................6-M4 KiSC issued 05, 2014 A...
Page 293: Hydraulic Circuit
STEERING B2650HSDC, B3350HSDC, 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 294: Steering Controller
STEERING B2650HSDC, B3350HSDC, 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 295: Steering Cylinder
STEERING B2650HSDC, B3350HSDC, WSM 3. STEERING CYLINDER (1) Rod (3) Rod Cover (5) O-ring (7) Gasket (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 296: Hydraulic Pump
STEERING B2650HSDC, B3350HSDC, WSM 4. 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 297 SERVICING CONTENTS 1. TROUBLESHOOTING.........................6-S1 2. SERVICING SPECIFICATIONS ....................6-S2 3. TIGHTENING TORQUES......................6-S3 4. CHECKING, DISASSEMBLING AND SERVICING ..............6-S4 [1] CHECKING AND ADJUSTING....................6-S4 (1) Relief Valve ........................6-S4 (2) Hydraulic Pump for Power Steering ................6-S5 [2] DISASSEMBLING .........................6-S5 (1) Separating Power Steering Controller ................6-S5 (2) Power Steering Cylinder....................6-S7 [3] SERVICING ...........................6-S9 (1) Power Steering Cylinder....................6-S9...
Page 298: Troubleshooting
STEERING B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Cannot Be Steered Steering controller malfunctioning Replace 6-S6 Pipe broken Replace 6-S4, 6-S6 Hard Steering Power steering oil improper Change with specified G-9, G-20 Hydraulic pump malfunctioning Replace...
Page 299: Servicing Specifications
STEERING B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS POWER STEERING BODY Item Factory Specification Allowable Limit Relief Valve Setting Pressure 10.8 to 11.3 MPa – 111 to 115 kgf/cm 1570 to 1630 psi (at 12 ± 0.5 L/min.) POWER STEERING CYLINDER...
Page 300: Tightening Torques
STEERING B2650HSDC, B3350HSDC, 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 : See page G-11.) Item N·m kgf·m lbf·ft Power steering hose for power steering cylinder 24 to 28 2.5 to 2.8...
Page 301: Checking, Disassembling And Servicing
STEERING B2650HSDC, B3350HSDC, WSM 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Relief Valve Relief Valve Operating Pressure 1. Disconnect the power steering hose LH (or RH) from steering the power steering cylinder, and set a pressure gauge and cable.
Page 302: Hydraulic Pump For Power Steering
(2) Hydraulic Pump for Power Steering Flowmeter Connection and Test Preparation 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 303 STEERING B2650HSDC, B3350HSDC, WSM Power Steering Controller 1. Remove the nuts (2). 2. Disconnect the power steering hoses (3) from the power steering controller (1). 3. Remove the power steering controller mounting bolts (4) from the stay. (When reassembling) • Connect the power steering hoses (3) to the power steering controller (1) securely.
Page 304: Power Steering Cylinder
STEERING B2650HSDC, B3350HSDC, WSM (2) Power Steering Cylinder Front Wheels • See page 5-S5. 9Y1210822STS0008US0 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 305 STEERING B2650HSDC, B3350HSDC, 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 306: Servicing
STEERING B2650HSDC, B3350HSDC, 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 1.5748 to 1.5772 in.
Page 307 HYDRAULIC SYSTEM KiSC issued 05, 2014 A...
Page 308 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT ....................... 7-M1 2. HYDRAULIC PUMP........................7-M2 3. THREE POINTS HYDRAULIC SYSTEM..................7-M3 [1] HYDRAULIC CIRCUIT ......................7-M3 [2] FRONT LOADER CONTROL VALVE .................. 7-M3 (1) Structure ......................... 7-M3 (2) Operation........................7-M4 [3] RELIEF VALVE ........................7-M11 [4] POSITION CONTROL VALVE ...................
Page 309: Hydraulic Circuit
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM 1. HYDRAULIC CIRCUIT (1) Hydrostatic Transmission (6) Relief Valve (10) Oil Filter Cartridge (14) Hydraulic Block (HST) (7) Oil Filter Cartridge (11) Hydraulic Pump (for 3-Points (15) Control Valve (2) Independent PTO Control (8) Oil Cooler...
Page 310: Hydraulic Pump
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 311: Three Points Hydraulic System
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM 3. THREE POINTS HYDRAULIC SYSTEM [1] HYDRAULIC CIRCUIT Two hydraulic pumps (4) (6) are installed in the B2650 and B3350. Hydraulic oil is forced from hydraulic pump (6) to the loader control valve (7), relief valve (8), hydraulic block (9) and position control valve (10).
Page 312: Operation
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 313 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 314 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 315 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 316 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 317 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 318 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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 319: Relief Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [3] 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 320: Position Control Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [4] POSITION CONTROL VALVE 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 feedback rod.
Page 321: Neutral
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (1) Neutral 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 322: Shockless Mechanism Operating (Lift To Neutral)
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (3) Shockless Mechanism Operating (Lift to Neutral) 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.
Page 323: Feedback Linkage For Position Control
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [5] 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 324 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) Relief Valve ........................7-S5 (3) Lift Arm ..........................7-S5 [2] PREPARATION ........................7-S6 (1) Hydraulic Pump .......................7-S6 (2) Hydraulic Cylinder and Control Valve................7-S7 (3) Removing Front Loader Control Valve Assembly............7-S11...
Page 325: Troubleshooting
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Implement Does Not Control valve broken Replace 7-S13 Rise (No Noise) Control valve improperly adjusted Adjust 7-S15 Control valve improperly assembled Repair 7-S15 Relief valve improperly assembled...
Page 326: Servicing Specifications
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS HYDRAULIC PUMP FOR 3-POINT HITCH HYDRAULIC SYSTEM Item Factory Specification Allowable Limit Pump Delivery At no pressure Above – Condition 17.0 L/min. • Engine Speed 4.49 U.S.gals/min. 2500 min (rpm) 3.74 lmp.gals/min.
Page 327: Tightening Torques
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, 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: See page G-11.) Item N·m kgf·m lbf·ft Power steering delivery hose nut 24 to 28 2.5 to 2.8...
Page 328: Checking, Disassembling And Servicing
(1) Hydraulic Pump for 3-Point Hitch Hydraulic System Flowmeter Connection and Test Preparation 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 329: Relief Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (2) Relief Valve 3-Point Hitch Relief Valve (Loader 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 2500 min (rpm).
Page 330: Preparation
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [2] PREPARATION (1) Hydraulic Pump IMPORTANT • The hydraulic pump is precision machined and assembled : If disassemble once, it may be unable to keep its original performance. Therefore, when the hydraulic pump fails, replacement should be done with the hydraulic pump assembled except when emergency repair is unavoidable.
Page 331: Hydraulic Cylinder And Control Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (2) Hydraulic Cylinder and Control Valve Rear Wheel and 3-Point Linkage 1. Place the disassembling stand under the transmission case. 2. Remove the rear wheel (1). 3. Remove the top link, lower links and lift rods.
Page 332 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM Seat Under Cover 1. Disconnect the ECU connector (1) and seat under cover (2) with ECU (3). (1) ECU Connector (3) ECU (2) Seat Under Cover 9Y1210822HYS0013US0 HST Pedal and Floor Mat 1. Remove the HST pedal (1) and floor mat (2).
Page 333 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM Front Loader Cables 1. Loosen the lock nuts (3) and remove the front loader cables (4). (When reassembling) • Set the lock lever (2) to lock position. • Fix the ball joint (1) first. • Adjust the length of the front loader cable (4) outer section so that the cable inner section has no play, and tighten the lock nut (3).
Page 334 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM Cabin Mounting Bolts 1. Remove the bolts and nuts (1). (When reassembling) 124 to 150 N·m Cabin mounting bolt and Tightening torque 12.7 to 15.2 kgf·m 91.5 to 110 lbf·ft (1) Bolt and Nut 9Y1210822HYS0023US0 Cabin Assembly 1.
Page 335: Removing Front Loader Control Valve Assembly
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (3) Removing Front Loader Control Valve Assembly Rear Wheel 1. Place the disassembling stand under the transmission case. 2. Remove the rear wheel (1). 167 to 191 N·m Rear wheel mounting nut 17 to 19.5 kgf·m 123 to 141 lbf·ft...
Page 336: Disassembling And Assembling
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [3] DISASSEMBLING AND ASSEMBLING (1) Hydraulic Pump Hydraulic Pump Cover, Side Plate and Gear 1. Secure the hydraulic pump with a vise, and remove the hydraulic pump cover (6) with casing (5). 2. Remove the side plate (4).
Page 337: Hydraulic Cylinder
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (2) Hydraulic Cylinder 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.
Page 338 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM Lift Arm, Hydraulic Arm Shaft and Hydraulic Arm 1. Remove the external circlip, and remove the lift arm LH (3). 2. Draw out the hydraulic arm shaft (2) and lift arm RH (1) as a unit.
Page 339: Hydraulic Control Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (3) Hydraulic Control Valve 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) •...
Page 340: Disassembling Front Loader Control Valve And Relief Valve
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM (4) Disassembling Front Loader Control Valve and Relief Valve (1) Plug (2) O-ring (3) Washer (4) Shim (5) Spring (6) Poppet 2 (7) Poppet 1 (8) Plug (9) O-ring (10) Spring (11) Check Valve (12) Dust Seal...
Page 341: Servicing
HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM [4] SERVICING Clearance between Tip of Gear Tooth and Casing 1. Measure the clearance between gear and casing at several points with feeler gauge. 2. If the clearance exceeds the allowable limit, replace the assembly.
Page 342 HYDRAULIC SYSTEM B2650HSDC, B3350HSDC, WSM Clearance between Hydraulic Arm Shaft and Bushing 1. Measure the hydraulic arm shaft O.D. with an outside micrometer. 2. Measure the bushing I.D. with a cylinder gauge, and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace the bushing.
Page 343 ELECTRICAL SYSTEM KiSC issued 05, 2014 A...
Page 344 MECHANISM CONTENTS 1. ELECTRICAL CIRCUIT ......................8-M1 [1] B2650 ........................... 8-M1 [2] B3350 (Inhibit Version) ......................8-M2 [3] B3350 (Default Version) ....................... 8-M3 2. ENGINE STARTING SYSTEM AND STOPPING SYSTEM ............8-M4 [1] OPC SYSTEM CIRCUIT (B2650)..................8-M4 [2] OPC SYSTEM CIRCUIT (B3350)..................8-M5 [3] CONTROLLER (B2650) .......................
Page 345: Electrical Circuit
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 1. ELECTRICAL CIRCUIT [1] B2650 8-M1 KiSC issued 05, 2014 A...
Page 346: B3350 (Inhibit Version)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [2] B3350 (Inhibit Version) 8-M2 KiSC issued 05, 2014 A...
Page 347: B3350 (Default Version)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [3] B3350 (Default Version) 8-M3 KiSC issued 05, 2014 A...
Page 348: Engine Starting System And Stopping System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 2. ENGINE STARTING SYSTEM AND STOPPING SYSTEM Operator presence control (OPC) system which B2650 and B3350 tractor are equipped with will automatically stop the engine when operator stands up from the seat while shifting the PTO lever, the independent PTO shift lever or the HST pedal.
Page 349: Opc System Circuit (B3350)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [2] OPC SYSTEM CIRCUIT (B3350) (1) Battery (7) Main Switch (13) Independent PTO Lever AC :AC Terminal (2) Starter Motor (8) Fuse (5 A) Switch G : G Terminal (3) Relay Stator (9) Fuse (5 A)
Page 350 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Controller Mechanism Controller is located inside the panel board. Current from the main switch, safety switches and regulator L terminal flows to controller. Controller receives current as data, processes the data, and sends out current computing results to starter motor, key stop solenoid relay, and key stop solenoid.
Page 351 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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. Independent PTO Lever Switch (Disengaged : ON, Engaged : OFF)
Page 352: Safety Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [4] SAFETY SWITCH  Type of Safety Switch There are two types of safety switches, normally closed type and normally open type. Normally closed type switch is electrically closed in normal condition. Normally open type switch is electrically opened in normal condition.
Page 353: Independent Pto Lever Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (2) Independent PTO Lever Switch Independent PTO Lever Switch This switch locations at the top of the independent PTO control valve. This switch is a push type. This switch detects the independent PTO valve operating.
Page 354: Seat Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (4) Seat Switch Seat Switch This switch locates under the seat (2). This switch is a push type. This switch detects the operator's sitting on the swat or not. When the operator sits on the seat, this switch is turned to "ON".
Page 355: Lighting System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 3. LIGHTING SYSTEM The lighting system consists of combination switch for head light, illumination lamp, tail light and hazard switches for tail lights etc.. 9Y1210822ELM0015US0 [1] LIGHT AND TAIL LIGHT Combination switch has three types of switches for head lights, illumination lamps and tail lights.
Page 356: Hazard Light
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [3] HAZARD LIGHT Hazard switch has two positions : ON and OFF. Turn signal lights 1 and 2 are used as hazard lights. Turn signal lights 1 and 2 and indicator lamps are shown in the figure above. The hazard light is operative when the key switch is in either the ON or OFF position.
Page 357: Easy Checker
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 4. EASY CHECKER™ To check the conditions of tractor easily before and during operation, easy checker combination of lamps on the easy checker board is provided. 9Y1210822ELM0019US0 [1] INDICATION ITEMS  Master Warning When trouble...
Page 358: Digital Display
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 5. DIGITAL DISPLAY This display shows the following information • Tractor information, such as engine speed, PTO rpm, hours the tractor has been operated and error code can be displayed. 9Y1210822ELM0021US0 [1] LCD MONITOR INDICATOR...
Page 359 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Engine Revolution and PTO Speed 1. The LCD monitor (1) gives several different displays. 2. The LCD monitor (1) displays "Engine rpm" normally. 3. The display switch (2) is pressed, the display is switched to "Rear PTO Speed", "Mid PTO Speed", "Engine rpm".
Page 360 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Power Train Error Code 1. If something is wrong with the power train, the master warning indicator (1) starts blinking and the error code is displayed on the LCD (2), indicating the location of the trouble.
Page 361 SERVICING CONTENTS 1. TROUBLESHOOTING.........................8-S1 2. SERVICING SPECIFICATIONS ....................8-S6 3. TIGHTENING TORQUES......................8-S7 4. CHECKING AND ADJUSTING....................8-S8 [1] BATTERY ..........................8-S8 [2] FUSE ...........................8-S10 [3] ECU AND METER PANEL ....................8-S11 (1) Engine ECU (B3350) .....................8-S11 (2) Meter Panel ........................8-S13 [4] STARTING SYSTEM......................8-S16 (1) Main Switch ........................8-S16 (2) Safety Switches ......................8-S19 (3) Starter..........................8-S22 (4) Glow Plug ........................8-S22...
Page 362 5. DISASSEMBLING AND ASSEMBLING..................8-S56 [1] STARTER ..........................8-S56 [2] ALTERNATOR........................8-S56 6. SERVICING ..........................8-S59 [1] STARTER ..........................8-S59 [2] ALTERNATOR........................8-S60 KiSC issued 05, 2014 A...
Page 363 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING FUSE AND WIRING Reference Symptom Probable Cause Solution Page All Electrical Battery discharged or damaged Recharge or Replace 8-S8 Equipment Do Not Battery positive cable disconnected or improperly Repair or Replace 8-S8 Operate...
Page 364 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM OPERATOR PRESENCE CONTROL (OPC) Reference Symptom Probable Cause Solution Page Engine Does Not Solenoid fuse blown (30A) Replace 8-S10 Stop Engine stop solenoid relay damaged Replace 8-S49 Engine stop solenoid damaged Replace 8-S24 Operator presence controller damaged...
Page 365 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM CHARGING SYSTEM Reference Symptom Probable Cause Solution Page Charging Lamp Does Fuse blown (10A) Replace 8-S10 Not Light When Main Wiring harness disconnected or improperly Replace meter panel 8-M1, Switch Is Turned ON connected 8-S13...
Page 366 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM LIGHTING SYSTEM Reference Symptom Probable Cause Solution Page Head light Does Not Fuse blown (10 A) Replace 8-S10 Light Bulb blown Replace G-39 Wiring harness disconnected or improperly Repair or Replace 8-M1, connected 8-S16, 8-S41...
Page 367 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM EASY CHECKER™ Reference Symptom Probable Cause Solution Page Oil Pressure Lamp Engine oil pressure too low Repair engine – Lights Up When Engine oil insufficient Fill G-19 Engine Is Running Oil pressure switch damaged Replace...
Page 368: Servicing Specifications
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS STARTER Item Factory Specification Allowable Limit Commutator O.D. 28.0 mm 27.0 mm 1.102 in. 1.063 in. Difference of Less than 0.05 mm O.D.'s 0.02 mm 0.0020 in. 0.0008 in. Mica Undercut 0.60 mm 0.20 mm...
Page 369 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 : See page G-11.) Item N·m kgf·m lbf·ft Coolant temperature sensor Less than 19.6...
Page 370: Checking And Adjusting
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 is running.
Page 371 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 372: Fuse
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [2] FUSE Checking Fuse 1. Check the fuse. 2. If any of the fuses is blown, replace it with the one having same capacity. IMPORTANT • If a fuse is blown, check the cause and be sure to replace it with the one having same capacity.
Page 373: Ecu And Meter Panel
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (Continued) [B3350] Fuse No. Capacity (A) Protected circuit Work Light Defogger Radio / Dome Light Aircon Blower Wiper Aircon Radio Starter Relay / ECU Glow Relay (10) Outlet (Rear) (11) Panel (12) Outlet (Front) (13)
Page 374 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Checking the Electric Control Unit (ECU) Battery (+B) Analog GND Analog Input 1-5 Battery (+B) 5 V Supply (Signal) Analog Input 1-6 Motor Output 1 5 V Supply (Signal) Analog Input 1-1 Motor Output 1...
Page 375: Meter Panel
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Connector Voltage (Main Circuit) 1. Turn on the main switch. (Do not start engine.) 2. Measure the voltage between terminal 1 or 2 (+) and terminal 19 (−). 3. It is OK if the voltage equals to the battery voltage.
Page 376 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (Continued)  B3350 [Connector 1] Terminal Color of Item wiring 1 to 5 Blank – Turn Signal (L) 7 to 12 Blank – [Connector 2] Terminal Color of Item wiring PTO ON/OFF Panel Mode Switch...
Page 377 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Battery Voltage  B2650 1. Disconnect the connector of connector 2 side. 2. Measure the voltage between terminal 15 (+) (Yellow/Blue) and terminal 11 (−) (Black). 3. Turn the main key switch ON. 4. Measure the voltage between terminal 16 (+) (Brown) and terminal 11 (−) (Black).
Page 378: Starting System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [4] STARTING SYSTEM (1) Main Switch Main Switch 1. Remove the steering wheel and the panel lower cover (1). 2. Disconnect the 4P connector and remove the main switch (2). 3. Perform the following checks.
Page 379 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Main Switch Continuity 1) Main Switch Key at OFF Position 1. Set the main switch OFF position. 2. Measure the resistance with an ohmmeter across the B terminal and the AC terminal, B terminal and 50 terminal, B terminal and 19 terminal.
Page 380 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 4) Main Switch Key at START Position 1. Set and hold the main switch key at the START position. 2. Measure the resistance with an ohmmeter across the B terminal and the 19 terminal, across the B terminal an the 50 terminal, and across the B terminal and the AC terminal.
Page 381: Safety Switches
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (2) Safety Switches Safety Switch Continuity 1. Disconnect the safety switch leads. 2. Connect the circuit tester to the safety switch leads. 3. Measure the resistance between leads. 4. If the safety switch is damaged, replace it.
Page 382 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Seat Switch Continuity Check 1. Disconnect the seat switch connector (1). 2. Connect the circuit tester leads to the seat switch connector. (When switch is not pushed) 1. Measure the resistance between terminals. 2. If continuity is not infinity, the switch is faulty. Replace it.
Page 383 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Independent PTO Lever Switch Check 1. Disconnect the 2P connector from the independent PTO lever switch (1). 2. Connect the circuit tester leads to the independent PTO lever switch terminals. (When independent PTO lever is in "DISENGAGED" position) 1.
Page 384: Starter
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (3) Starter Motor Test CAUTION • Secure the starter to prevent it from jumping up and down while testing the motor. 1. Disconnect the battery negative cable from the battery. 2. Disconnect the battery positive cable and the leads from the starter M terminal.
Page 385: Opc Controller (B2650)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Lead Terminal Voltage 1. Disconnect the wiring lead (1) from the glow plug (2) after turning the main switch off. 2. Turn the main switch key to the "PREHEAT" position, and measure the voltage between the lead terminal and the chassis.
Page 386: Key Stop Solenoid
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (6) Key Stop Solenoid Connector Voltage 1. Disconnect the 2P connector from key stop solenoid. 2. Turn the main switch key to the "ON" position. 3. Measure the voltage with voltmeter between the terminal 1, terminal 2 of wiring harness side and body.
Page 387: Engine Control System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [5] ENGINE CONTROL SYSTEM (1) Fuel Pump (B3350) NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the pump resistance. 9Y1210822ELS0066US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 388: Fuel Pump (For Reformer)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (2) Fuel Pump (for Reformer) NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the pump resistance. 9Y1210822ELS0066US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 389: Exhaust Temperature Sensor (B3350)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (3) Exhaust Temperature Sensor (B3350) NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is faulty if the relating electric circuit is normal. 9Y1210822ELS0064US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 390: Differential Pressure Sensor
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (4) Differential Pressure Sensor NOTE • Since it is not possible to do unit checking for this sensor, judge the sensor is faulty if the relating electric circuit is normal. 9Y1210822ELS0064US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 391: Accelerator Lever Sensor
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (5) Accelerator Lever Sensor Accelerator Lever Sensor Input Voltage 1. Remove the accelerator lever sensor connector (1). 2. Turn the main key switch ON. 3. Check the voltage between terminal A (+) and terminal B (−) of the wire harness side.
Page 392: Parked Regeneration Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (6) Parked Regeneration Switch NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the switch continuity. 9Y1210822ELS0049US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 393: Auto Regeneration Switch (Inhibit Version)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (7) Auto Regeneration Switch (Inhibit Version) NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the switch continuity. 9Y1210822ELS0049US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 394: Dpf Inhibit Switch (Default Version)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (8) DPF INHIBIT Switch (Default Version) NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the switch continuity. 9Y1210822ELS0112US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 395: Blower Motor
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (9) Blower Motor NOTE • Do active test "Air Blower for Fuel Reformer ON / OFF Function" by using diagmaster before following checking (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)"). 9Y1210822ELS0115US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 396: Air Valve
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (10) Air Valve NOTE • Check the actuation of air valve 1 and 2 before following checking. 1. Remove the double flare pipes from air valve 1 and 2 outlet. 2. Do active test "All Devices for Fuel Reformer Operate Function" by using diagmaster, then check if the air comes out from air valve outlet (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)").
Page 397: Engine Speed Sensor (B3350)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (11) Engine Speed Sensor (B3350) Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON" position. 2. Measure the voltage with a voltmeter across the terminals shown in the table below. 3. If the reference value is not indicated as shown in the table below, check the relating electric circuit.
Page 398: Heater Glow (V1505)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (12) Heater Glow (V1505) Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON" position. 2. Do active test "Catalyst Heater for Fuel Reformer ON / OFF Function" by using diagmaster before following checking (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)").
Page 399: Burner Glow (V1505)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (13) Burner Glow (V1505) Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON" position. 2. Do active test "Regen Gas Glow for Fuel Reformer ON / OFF Function" by using diagmaster before following checking (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)").
Page 400: Governor Solenoid (V1505)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (14) Governor Solenoid (V1505) NOTE • Do active test "EGV Solenoid Check Function" by using diagmaster before following checking (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)"). 9Y1210822ELS0127US0 Connector Voltage 1. Disconnect the connector, and turn the main key switch "ON"...
Page 401: Rack Sensor
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (15) Rack Sensor IMPORTANT • When exchanging the rack position sensor, be sure to do following procedure before removing the rack position sensor (Refer to "Diagnosis Manual V1505-T-E4 (9Y120-02490)" for the detail). 1. Do Utility "Gear Case or Gear Case Gasket or Rack Position Sensor Exchange" by using diagmaster and get "Actual Rack Position Before Exchange".
Page 402: Charging System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [6] CHARGING SYSTEM (1) Alternator Alternator 1. Disconnect the 2P connector (3) from alternator after turning the main switch OFF. 2. Perform the following checks. (1) B Terminal (3) 2P Connector (2) Alternator 9Y1210822ELS0029US0 Connector Voltage 1.
Page 403: Lighting System
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [7] 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 404 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 5) Turn Signal Light Switch Continuity When Setting Switch Knob at L Position 1. Set the turn signal light switch to the L position. 2. Measure the resistance with an ohmmeter across the B2 terminal and L terminal.
Page 405: Hazard Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (2) Hazard Switch Hazard Switch 1. Remove the meter panel and disconnect the 4P connector from hazard switch after disconnecting the battery negative code. 2. Remove the hazard switch. 3. Perform the following check. (1) Hazard Switch...
Page 406: Flasher Unit
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (3) 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 407: Work Light Switch
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (4) Work Light Switch Work Light Switch 1. Remove the meter panel lower cover and disconnect the 5P connector from work light switch (1). 2. Remove the work light switch (1). 3. Perform the following check.
Page 408: Room Lamp
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (5) Room Lamp NOTE • Firstly check the connector voltage, secondly check the other wires continuity, then finally check the switch continuity. 9Y1210822ELS0049US0 Connector Voltage 1. Disconnect the connector. 2. Measure the voltage with a voltmeter across the terminals shown in the table below.
Page 409: Warning Lamp, Indicator Lamp And Gauge
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [8] WARNING LAMP, INDICATOR LAMP AND GAUGE (1) 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 faulty.
Page 410: Fuel Sensor
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Sensor Resistance 1. Measure the resistance with an ohmmeter across the terminals shown in the table below. 2. If the reference value is not indicated, the intake air temperature sensor is faulty. at −20 °C (−4 °F) Approx.
Page 411: Relay
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [9] RELAY Engine Stop Solenoid Relay and ACC Relay 1. Open the bonnet and remove the engine stop solenoid relay (1). (B2650 Only) 2. Remove the panel lower cover and remove the ACC relay (2).
Page 412 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Glow Relay 1. Open the bonnet and remove the glow relay (1). 2. Check for continuity across 1 terminal and 4 terminal, and across 2 terminal and 3 terminal. 1 terminal – 4 terminal 93 to 113 Ω...
Page 413 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Other Relays 1. Remove the relays (1). 2. Apply battery voltage across 1 terminal and 2 terminal, and check for continuity across the 3 terminal and 4 terminal. 3. If 0 Ω is not indicated, renew the relays (1).
Page 414 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM (Continued) [B3350] Item Terminal No. Color of Wiring Reform and Glow Relay Starter Relay Work Light Relay Gr/R Defogger Relay Blower Relay Compressor Relay Lg/B 9Y1210822ELS0015US0 8-S52 KiSC issued 05, 2014 A...
Page 415: Other Switches
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [10] OTHER SWITCHES (1) Panel Mode Switch Panel Mode Switch Continuity 1. Disconnect the wiring leads from panel mode switch and remove it. 2. Measure the resistance with an ohmmeter across the panel mode switch terminals in each position.
Page 416 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM 2) Switch Continuity 1. Check the continuity across the terminals shown in the table below. 2. If the continuity specified below is not indicated, the switch is faulty. (1) Connector (Switch Side) 9Y1210822ELS0082US0 8-S54 KiSC issued 05, 2014 A...
Page 417: Accelerator Sensor Calibration (For B3350)
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM [11] ACCELERATOR SENSOR CALIBRATION (for B3350) NOTE • When the engine ECU or throttle sensor is replaced, this calibration is required. (Tractor condition) • Parking Brake: Engaged position (Parking brake switch ON) • HST Pedal: Neutral position •...
Page 418: Disassembling And Assembling
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 419 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Rear End Cover 1. Remove the three rear end cover screws and the B terminal nut, and remove the rear end cover. 9Y1210822ELS0091US0 Brush Holder 1. Remove the two screws holding the brush holder, and remove the brush holder (1).
Page 420 ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, WSM Rotor 1. Press out the rotor (1) from drive end frame (3). IMPORTANT • Be careful not to drop the rotor and damage the slip ring or fan, etc.. (1) Rotor (3) Drive End Frame...
Page 421: Servicing
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 422: Alternator
ELECTRICAL SYSTEM B2650HSDC, B3350HSDC, 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 423 CABIN KiSC issued 05, 2014 A...
Page 424 MECHANISM CONTENTS 1. AIR CONDITIONER SYSTEM....................9-M1 [1] OUTLINE OF AIR CONDITIONING SYSTEM..............9-M1 2. REFRIGERATION SYSTEM ...................... 9-M3 [1] COMPRESSOR........................9-M3 (1) Pressure Relief Valve ..................... 9-M4 (2) Magnetic Clutch......................9-M5 [2] CONDENSER........................9-M6 [3] RECEIVER ........................... 9-M7 [4] AIR CONDITIONER UNIT ....................9-M8 3.
Page 425: Air Conditioner System
CABIN B2650HSDC, B3350HSDC, WSM 1. AIR CONDITIONER SYSTEM [1] OUTLINE OF AIR CONDITIONING SYSTEM (1) Condenser (9) Outside Air Filter (2) Pressure Switch (10) Control Panel (3) High Pressure Pipe (11) Side Air Outlet (4) Receiver (12) Front Air Outlet...
Page 426 CABIN B2650HSDC, B3350HSDC, WSM (Continued) The machine is equipped with a thin large-capacity air conditioner with outside air intake. Through the inside air filter (13) as well as the outside air filter (9), the inner roof (14) and reaches the air conditioner unit (16). The air is then cooled and dehumidified by this unit.
Page 427: Refrigeration System
CABIN B2650HSDC, B3350HSDC, WSM 2. REFRIGERATION SYSTEM [1] COMPRESSOR The vane type compressor installed on this cabin consists of a cylinder (1) with an oval cross section and a rotor (2) with five vanes (3). The vane type compressor is provided with two suction ports and two discharge ports respectively.
Page 428: Pressure Relief Valve
CABIN B2650HSDC, B3350HSDC, WSM (1) Pressure Relief Valve If the high pressure is abnormally high, the pressure relief valve (1) opens to protect the circuit. Even in the worst case, the outflow of refrigerant is stopped at the minimum limit.
Page 429: Magnetic Clutch
CABIN B2650HSDC, B3350HSDC, WSM (2) Magnetic Clutch A magnetic clutch is used to engage and disengage the compressor from the engine. Main components are stator (6), rotor with pulley (5), and pressure plate (1) to engage the drive pulley (4) and compressor (8) magnetically.
Page 430: Condenser
CABIN B2650HSDC, B3350HSDC, WSM [2] CONDENSER The condenser (1) is installed in the front of the radiator to enable forced cooling by the air drawn in by the engine radiator fan. The condenser is used for the purpose of cooling by...
Page 431: Receiver
CABIN B2650HSDC, B3350HSDC, WSM [3] RECEIVER The receiver serves the purpose of storing the liquid refrigerant. The amount of liquid refrigerant flowing through the system varies with the operating condition of the air conditioner. To be accurate, the receiver stores excess refrigerant when the heat load is lowered.
Page 432: Air Conditioner Unit
CABIN B2650HSDC, B3350HSDC, WSM [4] AIR CONDITIONER UNIT The air conditioner unit consists of evaporator (2), expansion valve (3), heater core (4), blower (1). etc.. (1) Blower (3) Expansion Valve (2) Evaporator (4) Heater Core 9Y1210822CAM0009US0 A/C Blower The blower is incorporated in the left-hand space of the air conditioner unit.
Page 433: System Control
CABIN B2650HSDC, B3350HSDC, WSM 3. SYSTEM CONTROL (1) Temperature Control Dial (7) Recirculated Air (12) Air Outlet Door D3 (A) Control Plate (2) Mode Switch (8) Blower (Mode Door) (B) Air Selection Lever (3) Blow Switch (9) Evaporator (13) DEFOGGER...
Page 434: Electrical System
CABIN B2650HSDC, B3350HSDC, WSM 4. ELECTRICAL SYSTEM [1] ELECTRICAL CIRCUIT (1) Battery (7) Fuse (13) Compressor (19) Mode Switch Servo Motor (2) Slow Blow Fuse (8) Front Wiper Switch (14) A/C Control Amplifter (18) Thermostat (3) For CABIN Line (9) Rear Wiper Switch...
Page 435: Relay
CABIN B2650HSDC, B3350HSDC, WSM [2] RELAY Remove the outer roof and the relays are visible at the ceiling rear of the cabin: blower relay (1) and compressor relay (2). When the blower fan is adjusted for the air flow rate, the blower relay (1) is activated by a signal from the fan switch on the control panel.
Page 436 CABIN B2650HSDC, B3350HSDC, WSM  Color of wiring [B2650] Item Terminal No. Color of Wiring Blower Relay Compressor Relay [B3350] Item Terminal No. Color of Wiring Blower Relay Compressor Relay Lg/B (1) Connector (Wire Harness) 9Y1210822CAM0015US0 9-M12 KiSC issued 05, 2014 A...
Page 437 SERVICING CONTENTS 1. TROUBLESHOOTING.........................9-S1 2. SERVICING SPECIFICATIONS ....................9-S5 3. TIGHTENING TORQUES......................9-S6 4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE............9-S7 [1] HANDLING OF SERVICE TOOLS ..................9-S9 (1) Manifold Gauge Set......................9-S9 (2) Refrigerant Charging Hose....................9-S10 (3) Vacuum Pump Adaptor ....................9-S11 (4) Electric Gas Leak Tester ....................9-S11 (5) Can Tap Valve.......................9-S11 (6) T-joint..........................9-S12 (7) R134a Refrigerant Recovery and Recycling Machine...........9-S12...
Page 438 CABIN B2650HSDC, B3350HSDC, WSM 1. TROUBLESHOOTING COMPRESSOR Reference Symptom Probable Cause Solution Page Noisy Bearing of compressor worn or damaged Replace 9-S36 (Compressor ON) Valves in compressor damaged Replace 9-S36 Belt slipping Adjust or replace 9-S22 Compressor bracket mounting screws loosen...
Page 439 CABIN B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page Insufficient Cooling Belt slipping Adjust or replace 9-S22 (Compressor Does Magnetic clutch damaged Repair or replace 9-S36 Not Rotate Properly) Compressor damaged Replace 9-S36 Insufficient Cooling Temperature motor damaged Replace...
Page 440 CABIN B2650HSDC, B3350HSDC, WSM Reference Symptom Probable Cause Solution Page Insufficient Cooling Refrigerant too short Check with manifold 9-S13 (Hi-pressure Level is gauge Too Low) Compressor discharge valve damaged Replace 9-S36 Compressor gasket damaged Replace 9-S36 Low-pressure pipe in trouble...
Page 441 CABIN B2650HSDC, B3350HSDC, WSM WINDSHIELD WIPER Reference Symptom Probable Cause Solution Page Windshield Wiper Fuse blown (Short-circuit, burnt component Correct cause and G-37 Does Not Operate inside motor or other part for operation) replace Wiper motor damaged (Broken armature, worn...
Page 442: Servicing Specifications
CABIN B2650HSDC, B3350HSDC, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Kinds of refrigerant Charge Amount R134a – 650 to 710 g 1.44 to 1.56 lbs Refrigerating Cycle Pressure 0.15 to 0.20 MPa – (Refrigerating Cycle is Normal Operating) (LO Pressure Side) 1.5 to 2.0 kgf/cm...
Page 443 CABIN B2650HSDC, B3350HSDC, 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: See page G-11.) Item N·m kgf·m lbf·ft Rear wheel mounting nut 167 to 191 17 to 19.5...
Page 444: Precautions At Repairing Refrigerant Cycle
CABIN B2650HSDC, B3350HSDC, WSM 4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE When checking or repairing the air conditioning system, the following precautions and rules must be observed. And it is of first importance that no other personnel than a well-trained serviceman should be allow to handle the refrigerant.
Page 445 CABIN B2650HSDC, B3350HSDC, WSM (Continued) (Refrigerant) R134a Kinds of refrigerant Factory specification 650 to 710 g (Charge amount) 1.44 to 1.56 lbs (Compressor Oil) Quantity (Total) Brand Name 110 to 120 cc ND-OIL 8 0.116 to 0.126 U.S.qts <PAG* oil>...
Page 446: Manifold Gauge Set
CABIN B2650HSDC, B3350HSDC, WSM [1] HANDLING OF SERVICE TOOLS (1) Manifold Gauge Set The hand valves on the manifold gauge set are used to open and close the valve. The hand valve inscribed LO is for the low pressure side valve (5) and HI is for the high pressure side valve (3).
Page 447: Refrigerant Charging Hose
CABIN B2650HSDC, B3350HSDC, WSM (2) Refrigerant Charging Hose The charging hoses are classified into three colors. Each charging hose must be handled as follows: • The air conditioner manufacture recommends that the blue hose (6) is used for the LO pressure side (suction side), the green hose (5) for refrigeration side (center connecting port) and the red hose (3) for HI pressure side (discharged side).
Page 448: Vacuum Pump Adaptor
CABIN B2650HSDC, B3350HSDC, WSM (3) Vacuum Pump Adaptor Objective of the Vacuum Pump Adaptor 1. After vacuum has been created in the air conditioning cycle, when the vacuum pump is stopped, since there is vacuum in hoses within the gauge manifold, the vacuum pump oil flows back into the charging hose.
Page 449: T-Joint
CABIN B2650HSDC, B3350HSDC, WSM (6) T-joint T-joint (2) is used to increase efficiency of gas charging using two refrigerant containers (4) at a time. 1. Install two refrigerant container service valves to T-joint (2) sides and connect the charging hose (1) to it.
Page 450: Checking And Charging Refrigerant Cycle
CABIN B2650HSDC, B3350HSDC, WSM 5. CHECKING AND CHARGING REFRIGERANT CYCLE [1] CHECKING WITH MANIFOLD GAUGE IMPORTANT • The gauge indications described in the following testing are those taken under the same condition, so it should be noted that the gauge readings will differs somewhat with the ambient conditions.
Page 451 CABIN B2650HSDC, B3350HSDC, WSM Insufficient Refrigerant 1. Symptoms seen in refrigerating cycle • Both LO and HI pressure side (1), (2) pressures too low. LO pressure side (1) 0.05 to 0.10 MPa (0.5 to 1.0 kgf/cm , 7.1 to 14.2 psi) HI pressure side (2) 0.69 to 0.98 MPa (7 to 10 kgf/cm...
Page 452 CABIN B2650HSDC, B3350HSDC, WSM Air Entered in the Cycle 1. Symptoms seen in refrigerating cycle • Both LO and HI pressure side (1), (2) pressures too high. LO pressure side (1) 0.20 to 0.35 MPa (2.0 to 3.5 kgf/cm , 28.4 to 49.8 psi) HI pressure side (2) 1.96 to 2.45 MPa (20 to 25 kgf/cm...
Page 453 CABIN B2650HSDC, B3350HSDC, WSM Refrigerant Fails to Circulate 1. Symptoms seen in refrigerating cycle • LO pressure side (1) pressure is vacuum and, HI pressure side (2) is low pressure. LO pressure side (1) Vacuum HI pressure side (2) 0.49 to 0.59 MPa (5 to 6 kgf/cm , 71.2 to 85.3 psi)
Page 454: Discharging, Evacuating And Charging
CABIN B2650HSDC, B3350HSDC, WSM Faulty Compression of Compressor 1. Symptoms seen in refrigerating cycle • LO pressure side (1) 0.39 to 0.59 MPa (4 to 6 kgf/cm , 56.9 to 85.3 psi) • HI pressure side (2) 0.69 to 0.98 MPa (7 to 10 kgf/cm , 99.6 to 142.2 psi)
Page 455: Evacuating The System
CABIN B2650HSDC, B3350HSDC, WSM (2) Evacuating the System 1. Discharge refrigerant from the system by R134a refrigerant recovery and recycling machine. (See page 9-S12.) 2. Connect the charging hose (red) to the HI pressure side charging valve and connect the charging hose (blue) to the LO pressure side charging valve.
Page 456: Charging The Refrigerant
CABIN B2650HSDC, B3350HSDC, WSM (3) Charging the Refrigerant Charging an Empty System (Liquid) This procedure is for charging an empty system through the HI pressure side with the refrigerant in the liquid state. CAUTION • Never run the engine when charging the system through the HI pressure side.
Page 457 CABIN B2650HSDC, B3350HSDC, WSM Charging an Empty or Partially Charged System (Vapor) This procedure is to charge the system through the LO pressure side with refrigerant in the vapor state. When the refrigerant container is set right side up, refrigerant will enter the system as a vapor.
Page 458: Checking Charge Refrigerant Amount
CABIN B2650HSDC, B3350HSDC, WSM (4) Checking Charge Refrigerant Amount After charging the refrigerant, check for amount of charging refrigerant as follows. NOTE • The pressure on the following checking is the gauge indications at ambient temperature 30 °C (86 °F), so it should be noted that the pressure will differ some what with the ambient temperature.
Page 459: Checking, Disassembling And Servicing
CABIN B2650HSDC, B3350HSDC, WSM 6. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING (1) Compressor Operation of Magnetic Clutch 1. Turn off the A/C switch after starting the engine. 2. Check whether abrasion or abnormal noise is heard when only the magnetic clutch pulley is running.
Page 460: Control Panel (Blower Switch, A/C Switch, Mode Control Dial And Temperature Control Dial)
CABIN B2650HSDC, B3350HSDC, WSM (2) Control Panel (Blower Switch, A/C Switch, Mode Control Dial and Temperature Control Dial) Blower Switch Connector Voltage 1. Disconnect the 6P connector (2) from blower switch. 2. Turn the main switch to "ON" position. 3. Measure the voltage with a voltmeter across the connector terminal a and terminal b.
Page 461 CABIN B2650HSDC, B3350HSDC, WSM Connector Voltage 1. Disconnect the 16P connector (2) from control panel switch. 2. Turn the main switch to "ON" position. 3. Measure the voltage with a voltmeter across the terminal o and terminal a. 4. If the voltage differs from the battery voltage, the wiring harness, A/C relay or fuse is faulty.
Page 462: Blower Resistor
CABIN B2650HSDC, B3350HSDC, WSM Temperature Control Dial Checking 1. Turn the temperature control dial counterclockwise till it stops (at "COOL" position). 2. Measure the voltage with a voltmeter across the terminal b and terminal d. Make the following measurement with the terminals connected.
Page 463: Blower Motor
CABIN B2650HSDC, B3350HSDC, WSM (4) Blower Motor Blower Motor Test 1. Remove the outer roof. 2. Turn the blower motor (1) by hand and check whether it turns smoothly. 3. Disconnect the 2P connector (2) of blower motor (1). 4. Connect a jumper lead from battery (3) positive terminal to connector terminal b.
Page 464: Mode Motor
CABIN B2650HSDC, B3350HSDC, WSM (6) Mode Motor Mode Motor Checking 1. Make sure whether the mode switch (2) is damaged. 2. Turn the main switch to "ON" position. 3. Turn the blower switch at 1 position. 4. Turn the mode switch each (a), (b) and (c).
Page 465: Pressure Switch
CABIN B2650HSDC, B3350HSDC, WSM (8) Pressure Switch Pressure Switch 1) HI Pressure Side 1. Connect the manifold gauge (7) to compressor as following procedure. Close the HI and LO pressure valves (2), (3) of manifold gauge tightly, and connect the charging hoses (1), (4) (red and blue) to the respective compressor service valves.
Page 466: Wiper Switch
CABIN B2650HSDC, B3350HSDC, WSM (9) Wiper Switch Front and Rear Wiper Switch 1. Remove the panel under cover and meter panel. 2. Disconnect the front switch connector. 3. Perform the following checkings 1) and 2). (1) Front Wiper Switch (2) Rear Wiper Switch...
Page 467: Wiper Motor
CABIN B2650HSDC, B3350HSDC, WSM (10) Wiper Motor Front and Rear Wiper Motor 1. Raise up the wiper arm (2). 2. Turn the main switch to "ON" position. 3. Push the front wiper switch to "ON" position. 4. Count the number of wiper arm rocking per minutes.
Page 468 CABIN B2650HSDC, B3350HSDC, WSM 2) Switch Continuity 1. Check the continuity across the terminals shown in the table below. 2. If the continuity specified below is not indicated, the switch is faulty. (1) Connector (Switch Side) 9Y1210822ELS0082US0 Other Relays 1. Remove the relays (1).
Page 469: Disassembling And Assembling
CABIN B2650HSDC, B3350HSDC, WSM [2] DISASSEMBLING AND ASSEMBLING (1) Separating Cabin from Tractor Body NOTE • Without discharging the refrigerant from system. 9Y1210822CAS0052US0 Battery Cable 1. Open the bonnet and remove the side cover. 2. Disconnect the battery negative cable (1).
Page 470 CABIN B2650HSDC, B3350HSDC, WSM Accelerator Wire (B2650) 1. Disconnect the accelerator wire (1). (When reassembling) • Set the end of wire inner (3) first. Then adjust the length of the wire outer section so that the wire inner section has no play, and tighten the lock nut (2).
Page 471 CABIN B2650HSDC, B3350HSDC, WSM Position Control Lever and Cruise Control Lever 1. Remove the cruise control cable (2) from cruise control lever (4). 2. Remove the lever mounting nut (5), cruise control lever (4) and position control lever (6). (When reassembling) •...
Page 472 CABIN B2650HSDC, B3350HSDC, WSM Brake Pedal Rods 1. Disconnect the both left and right sides brake pedal rods (1). (1) Brake Pedal Rod 9Y1210822HYS0022US0 Cabin Mounting Bolts 1. Remove the bolts and nuts (1). (When reassembling) 124 to 150 N·m...
Page 473: Removing Compressor Assembly
CABIN B2650HSDC, B3350HSDC, WSM (2) Removing Compressor Assembly Compressor Assembly 1. Discharge the refrigerant from the system. (See page 9-S17.) 2. Disconnect the low pressure pipe (suction) (4) and high pressure pipe (discharge) (1) from the compressor, then cap the open fitting immediately to keep moisture out of the system.
Page 474 CABIN B2650HSDC, B3350HSDC, WSM Hub Plate 1. Three stopper bolts (1) are set in stopper magnetic clutch (2) at the position corresponding to the shape of compressor. 2. The stopper magnetic clutch (2) is hung on hub plate (3) and it is fixed that the compressor rotates.
Page 475: Removing Air Conditioner Unit
CABIN B2650HSDC, B3350HSDC, WSM (3) Removing Air Conditioner Unit Draining Coolant • See page 9-S32. 9Y1210822CAS0057US0 Discharging Refrigerant • See page 9-S17. 9Y1210822CAS0058US0 Outer Roof and Stay 1. Remove the outer roof (1). 2. Remove the stay (2). 3.5 to 4.0 N·m...
Page 476: Removing Air Conditioner Pipes
CABIN B2650HSDC, B3350HSDC, WSM Water Cable, Temperature Motor and Mode Motor 1. Disconnect the water cable (1). 2. Remove the motor screws (2). (1) Water Cable 6 mm (0.2 in.) (2) Motor Screw 9Y1210822CAS0061US0 Air Conditioning Unit 1. Remove the unit cover.
Page 477 CABIN B2650HSDC, B3350HSDC, WSM High Pressure Hose 1, 2 and Low Pressure Hose 1. Disconnect the low pressure hose (3) and high pressure hose 1 (1) from the compressor (2), then cap the open fittings immediately to keep moisture out of the system.
Page 478: Removing Heater Hoses
CABIN B2650HSDC, B3350HSDC, WSM High Pressure and Low Pressure Pipes 1. Remove the outer roof (1), inner roof (2) and inner cover (3). 2. Remove the lever grips and lever guide (4). 3. Remove the floor mat (5). 4. Disconnect the high pressure pipe 2 (7), then cap the open fitting immediately to keep moisture out of the system.
Page 479: Cabin Windshields
• Sika product are made by Sika Corporation. • Shin Etsu silicon KE420 is made by Shin Etsu Polymer Corporation. • These materials can't be provided by Kubota Corporation. • Therefore, please find the local made equivalent materials in your country and use them when you need.
Page 480 CABIN B2650HSDC, B3350HSDC, WSM Before Replacing Windshields (1) [In case of using piano wire (When glass is clacked)] 1. Thread the piano wire from the inside of cabin. Tie its both ends to a wooden blocks or the like. (See the left figure.) 2.
Page 481 CABIN B2650HSDC, B3350HSDC, WSM Rear Windshield 1. Apply a Sika primer 260P-JM-1 on the cabin frame. 2. Apply a Sika Flex 250P-JM-1 (2) (or equivalent) on the rear windshield (1) as shown in figure. 3. Install the rear windshield (1) to the cabin and fix tit with a gummed tape.
Page 482 CABIN B2650HSDC, B3350HSDC, WSM Front Windshield NOTE • Apply the Sika Flex 250P-JM-1 (or equivalent) with the jig having the specified tip shape as shown in the figure left. • Apply it with a uniform speed to minimize unevenness. • Follow the instruction manual of Sika Flex 250P-JM-1.
Page 483: Wiper Motor
CABIN B2650HSDC, B3350HSDC, WSM (7) Wiper Motor Front Wiper Motor 1. Remove the panel lower cover. 2. Disconnect the front wiper motor 4P connector. 3. Remove the wiper arm mounting nut (4) and wiper arm (2). 4. Remove the wiper link cap (5).
Page 484: Servicing
CABIN B2650HSDC, B3350HSDC, WSM [3] SERVICING Adjustment of Air Gap 1. Measure the air gap with a feeler gauge. 2. When the measurement value comes off from factory specification, adjustment shim (1) is added or deleted. 0.30 to 0.65 mm...
Page 485 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. 05, S, EI, EI, engusa Code No.9Y111-08221 2012.

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