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Kubota M6800S Workshop Manual

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Table of Contents

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WORKSHOP MANUAL
TRACTOR
M6800,M6800S,
M8200,M9000
KiSC issued 03, 2008 A

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Summary of Contents for Kubota M6800S

  • Page 1 WORKSHOP MANUAL TRACTOR M6800,M6800S, M8200,M9000 KiSC issued 03, 2008 A...
  • Page 2 This Workshop Manual has been prepared to provide servicing personnel with information on the mechanism, service and maintenance of KUBOTA Tractors M6800, M6800S, M8200 and M9000. It is divided into two parts, “Mechanism” and “Servicing” for each section except “ENGINE” section.
  • Page 3 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS 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 4 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS SAFETY STARTING • Do not start the engine by shorting across starter terminals or bypassing the safety start switch. • Do not alter or remove any part of machine safety system.
  • Page 5 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS VENTILATE WORK AREA • If the engine must be running to do some work, make sure the area is well ventilated. Never run the engine in a closed area. The exhaust gas contains poisonous carbon monoxide.
  • Page 6 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS 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 7 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS KiSC issued 03, 2008 A...
  • Page 8 M6800 · M6800S · M8200 · M9000, WSM SAFETY INSTRUCTIONS KiSC issued 03, 2008 A...
  • Page 9 M6800 · M6800S · M8200 · M9000, WSM SPECIFICATIONS SPECIFICATIONS M6800 M6800S Model Model V3300-E / V3300-E2 Type Vertical, water-cooled, 4-cycle diesel engine Number of cylinders Total displacement 3318 cm (202.5 cu.in.) 98 × 110 mm (3.9 × 4.3 in.)
  • Page 10 M6800 · M6800S · M8200 · M9000, WSM SPECIFICATIONS M8200 M9000 Model Model V3300-TE / V3300-TE2 V3300-TIE / V3300-TIE2 Type Vertical, water-cooled, 4-cycle diesel engine Number of cylinders Total displacement 3318 cm (202.5 cu.in.) 98 × 110 mm (3.9 × 4.3 in.)
  • Page 11 M6800 · M6800S · M8200 · M9000, WSM DIMENSIONS DIMENSIONS KiSC issued 03, 2008 A...
  • Page 12 M6800 · M6800S · M8200 · M9000, WSM DIMENSIONS KiSC issued 03, 2008 A...
  • Page 13 M6800 · M6800S · M8200 · M9000, WSM DIMENSIONS KiSC issued 03, 2008 A...
  • Page 14 GENERAL KiSC issued 03, 2008 A...

  • Page 15: Table Of Contents

    GENERAL CONTENTS 1. FEATURES ...................... G-1 2. TRACTOR IDENTIFICATION ................. G-3 [1] MODEL NAME AND SERIAL NUMBERS..........G-3 [2] E2 ENGINE ....................G-5 [3] CYLINDER NUMBER ................G-5 3. GENERAL PRECAUTIONS ................G-6 4. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING .. G-7 [1] WIRING......................

  • Page 16: Features

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 1. FEATURES 1. New Design Full-open Hood and Flat Top Fender 2. Hydrostatic Power Steering 3. Synchro-Shuttle Lo-Reverse [M6800] Forward-Reverse [M6800S · M8200 · M9000] 4. Hydraulic Independent PTO 5. Foldable ROPS 6.
  • Page 17 M6800 · M6800S · M8200 · M9000, WSM G GENERAL 10.Wet Disc Brake 11.Three Point Hitch with Big Lift Power 12.Telescope Lower Link (M8200 · M9000) 13.Remote Valve Self-Cancelling with Detents (Standard) Flow Control Valve (Option) Floating Valve with Detent (Option)

  • Page 18: Tractor Identification

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 2. TRACTOR IDENTIFICATION [1] MODEL NAME AND SERIAL NUMBERS When contacting your local KUBOTA distributor, always specify engine serial number, tractor serial number and hourmeter reading. (1) Tractor Identification Plate...
  • Page 19 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Engine Serial Number The engine serial number is an identified number for the engine. It is marked after the engine model number. It indicates month and year of manufacture as follows.

  • Page 20: E2 Engine

    The time to enforce the regulations differs depending on the engine output classifications. Kubota has been supplying the diesel engines conforming to the emission regulations in respective countries. Exhaust emissions regulations shift to the second stage.

  • Page 21: General Precautions

    Screws, bolts and nuts should be installed in their original position to prevent reassembly errors. • When special tools are required, use KUBOTA genuine special tools. Special tools which are not frequently used should be made according to the drawings provided.

  • Page 22: Handling Precautions For Electrical Parts And Wiring

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 4. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING To ensure safety and prevent damage to the machine and surrounding equipment, heed the following precautions in handling electrical parts and wiring.
  • Page 23 M6800 · M6800S · M8200 · M9000, WSM G GENERAL • Securely insert grommet. (1) Grommet (A) Correct (B) Incorrect W1011388 • Securely clamp, being careful not to damage wiring. (1) Clamp (3) Clamp • Wind Clamp Spirally (4) Welding Dent...

  • Page 24: Battery

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [2] BATTERY • Take care not to confuse positive and negative terminals. • When removing battery cord, disconnect negative wire first. When installing battery cord, check for polarity and connect positive wire first.

  • Page 25: Handling Of Circuit Tester

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL • Use sandpaper to remove rust from terminals. • Repair deformed terminal. Make certain there is no terminal being exposed or displaced. (1) Exposed Terminal (3) Sandpaper (2) Deformed Terminal...

  • Page 26: Lubricants Fuel And Coolant

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 5. LUBRICANTS FUEL AND COOLANT Capacity Place Lubricants, fuel and coolant M6800(S) M8200 M9000 65 L 90 L No. 2-D diesel fuel Fuel tank 17.2 U.S.gals. 23.8 U.S.gals. No. 1-D diesel fuel if temperature is below −10 °C (14 °F)
  • Page 27 • Transmission Oil : The oil used to lubricate the transmission is also used as hydraulic fluid. To insure proper operation of the hydraulic system and complete lubrication of the transmission, it is important that a multi-grade transmission fluid be used in this system. We recommend the use of KUBOTA SUPER UDT fluid for optimum protection and performance.

  • Page 28: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 6. TIGHTENING TORQUES Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below. [1] GENERAL USE SCREWS, BOLTS AND NUTS...

  • Page 29: Maintenance

    • The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction.

  • Page 30: Check And Maintenance

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 8. 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.

  • Page 31: Check Points Of Initial 50 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [2] CHECK POINTS OF INITIAL 50 HOURS Changing Engine Oil CAUTION • Before changing oil, be sure to stop the engine. • Allow engine to cool down sufficiently, oil can be hot and can burn.
  • Page 32 2. After draining reinstall the drain plug. 3. Fill with the new KUBOTA SUPER UDT fluid up to the upper notch on the dipstick (2). 4. (See “5. LUBRICANTS, FUEL AND COOLANT” at GENERAL Section.)

  • Page 33: Check Points Of Every 50 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL Checking Water Separator 1. As water is collected in the water separator, the red float (1) is raised. 2. When the red float (1) has reached the white line level, close the fuel cock (2), loosen the retainer ring (3), and take out and empty the cup (4).
  • Page 34 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Checking Engine Start System [M6800] CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.
  • Page 35 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Checking Engine Start System [M6800S · M8200 · M9000] CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.

  • Page 36: Check Points Of Every 100 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL Checking Wheel Mounting Nuts Tightening Torque CAUTION • Never operate tractor with a loose rim, wheel, or axle. • Any time bolts and nuts are loosened, retighten to specified torque.
  • Page 37 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Directions for Storage CAUTION • When connecting the battery, do not reverse the polarities. Connection with reverse polarities will cause spark and troubles to the battery and electrical system in the tractor.
  • Page 38 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Adjusting Fan Belt Tension CAUTION • Be sure to stop the engine before checking belt tension. 10 to 12 mm Belt tension Factory spec. 0.39 to 0.47 in. 1. Stop the engine and remove the key.
  • Page 39 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Lubricating Grease Fittings 1. Apply a small amount of multipurpose grease to following points every 100 hours : 2. If you operated the machine in extremely wet and muddy condition, lubricate grease fittings more often.

  • Page 40: Check Points Of Every 200 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [5] CHECK POINTS OF EVERY 200 HOURS Changing Engine Oil • See page G-16. W1025684 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.

  • Page 41: Check Points Of Every 300 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position. 3. Lower the implement, lock the park brake and stop the engine.
  • Page 42 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Replacing Engine Oil Filter CAUTION • Be sure to stop the engine before changing the oil filter cartridge. • Allow engine to cool down sufficiently, oil can be hot and can burn.

  • Page 43: Check Points Of Every 600 Hours

    2. After draining reinstall the drain plug (1). 3. Fill with the new KUBOTA SUPER UDT fluid up to the upper notch on the dipstick (2). (See “5. LUBRICANTS, FUEL AND COOLANT” at GENERAL Section.)

  • Page 44: Check Points Of Every 800 Hours

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL Changing Front Differential Case Oil 1. To drain the used oil, remove the drain and filling plug (1), (2) at the front differential case and drain the oil completely into the oil pan.

  • Page 45: Check Points Of Every 1 Year

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [10] CHECK POINTS OF EVERY 1 YEAR Replacing Air Cleaner Primary Element and Secondary Element 1. See “Cleaning Air Cleaner Primary Element” in every 100 hours maintenance. W1028012 [11] CHECK POINTS OF EVERY 2 YEARS...
  • Page 46 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Flush Cooling System and Changing Coolant (Continued) Anti-Freeze If coolant freezes, it can damage the cylinders and radiator. It is necessary, if the ambient temperature falls below 0 °C (32 °F), to remove coolant after operating or to add anti-freeze to it.

  • Page 47: Others

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [12] OTHERS Bleeding Fuel System Air must be removed: 1. When the fuel filter or lines are removed. 2. When water is drained from water separator. 3. When tank is completely empty.
  • Page 48 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Replacing Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system.

  • Page 49: Special Tools

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 9. SPECIAL TOOLS Special Use Puller Set Code No: 07916-09032 Application: Use exclusively for pulling out bearing, gears and other parts with ease. W1024050 Piston Ring Compressor Code No: 07909-32111 Application: Use exclusively for pushing in the piston with piston rings into the cylinder.
  • Page 50 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Oil Pressure Tester Code No: 07916-32032 Application: Use to measure lubricating oil pressure. (1) Gauge (5) Adaptor 2 (2) Cable (6) Adaptor 3 (3) Threaded Joint (7) Adaptor 4 (4) Adaptor 1...
  • Page 51 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Nozzle Tester Code No: 07909-31361 Application: Use to check the fuel injection pressure and spray pattern of nozzle. Measuring: 0 to 50 MPa range (0 to 500 kgf/cm , 0 to 7000 psi)
  • Page 52 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Relief Valve Pressure Tester Code No: 07916-50045 Application: This allows easy measurement of relief set pressure. (1) Gauge (07916-50322) (6) Adaptor C (PS3/8) (07916-50371) (2) Cable (07916-50331) (7) Adaptor D (PT1/8) (07916-50381)
  • Page 53 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Clutch Tool B Code No: 07916-53041 Application: Use for mounting the clutch to the flywheel. (1) Gauge Ring (3) Centering Guide (2) Center Bar W1031036 Rear Axle Cover Puller Code No: 07916-51041 Application: Use for removing a rear axle cover from rear axle.
  • Page 54 M6800 · M6800S · M8200 · M9000, WSM G GENERAL NOTE • The following special tools are not provided, so make them referring to the figure. Bushing Replacing Tool Application: Use to press out and to press fit the bushing.
  • Page 55 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Valve Guide Replacing Tool Application: Use to press out and press fit the valve guide. [Intake valve guide] 20 mm dia. (0.79 in. dia.) 11.7 to 11.9 mm dia. (0.460 to 0.468 in. dia.) 6.5 to 6.6 mm dia.
  • Page 56 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Sleeve (Fan Drive Pulley Side) Replacing Tool Application: Use to press fit the fan drive pulley sleeve. 125 mm (4.9212 in.) 30 mm (1.1811 in.) 15 mm (0.5905 in.) Rmax = 12.5 S 15 mm dia.
  • Page 57 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Auxiliary Socket for Fixing Crankshaft Sleeve Application: Use to fix the crankshaft sleeve of the diesel engine. Rmax = 12.5 S 94.5 to 95.0 mm dia. (3.7205 to 3.7402 in. dia.) 40 mm dia.
  • Page 58 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Injection Pump Gear Puller Application: Use for remove the injection pump gear from governor shaft. 10 mm dia. (0.39 in. dia.) M16 × Pitch 1.5 19 mm (0.75 in.) 0.5 mm radius (0.02 in. radius) 0.89 rad (50 °)
  • Page 59 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Engine Stand Application: Use to support engine. NOTE • This special tool is not provided, so make it referring to the figure. 480 mm (18.90 in.) 50 mm (1.97 in.) 108.5 mm (4.272 in.)
  • Page 60 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Jig for Governor Connecting Rod Application: Use for connecting the governor connecting rod to the rack pin of the fuel injection pump assembly. R1 mm (0.0394 in. radius) C0.2 mm (0.0079 in.) C2 mm (0.0787 in.)
  • Page 61 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Hydraulic Arm Shaft Bushing Press-Fitting Tool Application: Use for replacing the hydraulic arm shaft bushings in the hydraulic cylinder body. NOTE • This special tool is not provided, so make it referring to the figure.
  • Page 62 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Locking Wrench Application: Use for locking a pinion nut. NOTE • This special tool is not provided, so make it referring to the figure. 170 mm (6.69 in.) 130 mm (5.12 in.) 63.5 mm (2.5 in.)
  • Page 63 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Cylinder Safety Valve Setting Pressure Adaptor (For M8200 · M9000) Application: Use for setting the safety valve to the nozzle tester to measure cracking pressure and check oil tightness of the safety valves.
  • Page 64 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Balancer Bushing Replacing Tool 1 Assembly Application: Use to press fit the bushing. NOTE • This special tool is not provided, so make it referring to the figure. Name of Part Q’ty...
  • Page 65 M6800 · M6800S · M8200 · M9000, WSM G GENERAL 2) Piece 1 Chamfer 0.1 mm (0.004 in.) 1 mm (0.04 in.) Chamfer 1 mm (0.04 in.) 53.8 to 53.9 mm dia. (2.1181 to 2.1220 in. dia.) 20.02 to 20.041 mm dia. (0.7882 to 0.7890 in. dia.) 48 mm dia.
  • Page 66 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Balancer Bushing Replacing Tool 2 Application: Use to press fit the bushing. NOTE • This special tool is not provided, so make it referring to the figure. 35 mm (1.38 in.) 33 mm (1.30 in.)
  • Page 67 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Balancer Replacing Tools 3, 4, 5 Application: Use to press fit the bushing. NOTE • This special tool is not provided, so make it referring to the figure. Name of Part Q’ty...
  • Page 68 M6800 · M6800S · M8200 · M9000, WSM G GENERAL 2) Shaft 44 mm dia. (1.73 in. dia.) 12 mm (0.47 in.) Chamfer 1 mm (0.04 in.) 3 mm (0.12 in.) 3 mm (0.12 in.) 30 mm (1.18 in.) 38 mm (1.38 in.) 35 mm (1.38 in.)
  • Page 69 M6800 · M6800S · M8200 · M9000, WSM G GENERAL 4) Joint 1 M12 × P1.25 Chamfer 1 mm (0.04 in.) 30 mm dia. (1.18 in. dia.) 13 mm dia. (0.51 in. dia.) Chamfer 3 mm (0.12 in.) R3 mm (0.12 in. radius) 45 mm (1.77 in.)
  • Page 70 M6800 · M6800S · M8200 · M9000, WSM G GENERAL 7) Piece 3 26 mm (1.02 in.) 18 mm (0.71 in.) 16.5 to 17.0 mm (0.6496 to 0.6693 in.) 1.5 mm (0.06 in.) 53.0 to 53.2 mm dia. (2.0866 to 2.0945 in. dia.) 49.55 to 49.75 mm dia.

  • Page 71: Tires

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL 10. TIRES [1] TYPE OF TIRES IMPORTANT • Do not use tires larger than specified. The following tires can be mounted on models M6800(S), M8200 and M9000. Model Type of Tire...

  • Page 72: Front Wheels [4Wd]

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL (2) Front Wheels [4WD] Front wheels can be adjusted. (A) Tread W1039833 (3) Rear Wheels Rear tread can be adjusted in 6 steps depending on the model. To change the tread 1.

  • Page 73: Wheel Hub

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [3] WHEEL HUB Front wheel hub Rear wheel hub – Screw circle diameter 152.4 mm 203.2 mm 203.2 mm (6 in.) (8 in.) (8 in.) Number of screws M14 × P1.5 M16 ×...

  • Page 74: Tire Liquid Injection

    M6800 · M6800S · M8200 · M9000, WSM G GENERAL [5] TIRE LIQUID INJECTION Auxiliary weights can be used to increase traction force for plowing in fields or clayey ground. Another way is to inject water or another liquid, such as a calcium chloride solution in the tires. Water must not be used in winter since it freezes at 0 °C (32 °F).
  • Page 75 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Injection CAUTION • When a calcium chloride solution is used, cool it before pouring it into the tire. • Do not fill tires with water or solution more than 75 % of full capacity (to the valve stem level).
  • Page 76 M6800 · M6800S · M8200 · M9000, WSM G GENERAL Draining Water or Solution 1. Lift the rear tires off the ground. 2. Turn the tire so that the air valve is at the bottom. 3. Remove the air valve, and drain liquid (liquid can only be drained to the level of the valve and liquid under that level remains inside).

  • Page 77: Implement Limitations

    KUBOTA. Use with implements which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Tractor may result in malfunctions or failures of the tractor, damage to other property and injury to the operator or others. [Any malfunctions or failures of the tractor resulting from use with improper implements are not covered by the warranty.]...
  • Page 78 M6800 · M6800S · M8200 · M9000, WSM G GENERAL M6800(S) M8200 M9000 Implement Remarks 3000 L 4000 L Max. Tank (790 U.S.gals. (1060 U.S.gals. Capacity 660 Imp.gals.) 880 Imp.gals.) Slurry Tank Max. Load 4000 mm 5000 mm (11000 in.) Capacity (8800 in.)
  • Page 79 M6800 · M6800S · M8200 · M9000, WSM G GENERAL M6800(S) M8200 M9000 Implement Remarks Numbers of Cultivating Tines Sub Soiler 400 mm 550 mm Cultivating Depth 450 mm (18 in.) 500 mm (20 in.) (16 in.) (22 in.) 3660 mm 5490 mm Max.
  • Page 80 ENGINE KiSC issued 03, 2008 A...
  • Page 81 MECHANISM CONTENTS 1. ENGINE BODY ..................... 1-M1 [1] CYLINDER BLOCK................. 1-M1 [2] CRANKSHAFT..................1-M1 2. FUEL SYSTEM ..................... 1-M2 [1] FUEL FILTER..................1-M2 3. TURBO CHARGER SYSTEM ..............1-M3 [1] BOOST COMPENSATOR ..............1-M3 NOTICE For not above-mentioned engine mechanism information, please refer ENGINE MECHANISM WSM (97897-0187-0).

  • Page 82: Engine Body

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 1. ENGINE BODY [1] CYLINDER BLOCK This engine employs separate type crankcases - the crankcase 1 with combustion part and the crankcase 2 which supports the crankcase 1 and reduces noise.

  • Page 83: Fuel System

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 2. FUEL SYSTEM (1) Fuel Tank (2) Separator (3) Fuel Filter (4) Injection Pump (5) Injection Nozzle (6) Injection Pipe (7) Fuel Overflow Pipe (8) Check Valve (9) Fuel Feed Pump W1012785 Fuel from the fuel tank (1) suck up by feed pump (9) through the separator (2) and then enter the fuel filter (3).

  • Page 84: Turbo Charger System

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 3. TURBO CHARGER SYSTEM [1] BOOST COMPENSATOR The boost compensator is controlled by the boost pressure of the control mechanism which controls transient smoke caused by oversupply of fuel when the engine starts and accelerates.
  • Page 85 SERVICING CONTENTS 1. TROUBLESHOOTING ..................1-S1 2. SERVICING SPECIFICATIONS ..............1-S4 3. TIGHTENING TORQUES ................1-S11 4. CHECKING, DISASSEMBLING AND SERVICING........1-S12 [1] SEPARATING ENGINE FROM TRACTOR .........1-S12 [2] ENGINE BODY ..................1-S17 (1) Cylinder Head ...................1-S17 (2) Timing Gear ..................1-S32 (3) Piston and Connecting Rod ..............1-S48 (4) Flywheel and Crankshaft ..............1-S54 [3] LUBRICATING SYSTEM ...............1-S63 (1) Checking ...................1-S63...

  • Page 86: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Engine Does Not • No fuel Replenish fuel – Start • Air in the fuel system Vent air G-32 • Water in the fuel system Change fuel and –...
  • Page 87 M6800 · M6800S · M8200 · M9000, WSM ENGINE Reference Symptom Probable Cause Solution Page Either White or Blue • Excessive engine oil Reduce to specified – Exhaust Gas Is level Observed • Piston ring and liner worn or stuck...
  • Page 88 M6800 · M6800S · M8200 · M9000, WSM ENGINE Reference Symptom Probable Cause Solution Page Water Mixed into • Head gasket defective Replace 1-S22, S24 Lubricant Oil • Cylinder block or cylinder head flawed Replace 1-S25 Low Oil Pressure • Engine oil insufficient Replenish –...

  • Page 89: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 2. SERVICING SPECIFICATIONS Cylinder Head Item Factory Specification Allowable Limit Cylinder Head Surface Flatness – 0.05 mm 0.0020 in. Top Clearance V3300-E 0.72 to 0.90 mm – V3300-E2 0.0283 to 0.0354 in.
  • Page 90 M6800 · M6800S · M8200 · M9000, WSM ENGINE Valves (Continued) Item Factory Specification Allowable Limit Clearance between Valve Stem and Valve 0.035 to 0.065 mm 0.1 mm Guide (Serial No : below 3N8371) 0.0014 to 0.0025 in. 0.0039 in.
  • Page 91 M6800 · M6800S · M8200 · M9000, WSM ENGINE Valve Spring Item Factory Specification Allowable Limit Valve Spring Intake 35.1 to 35.6 mm 34.6 mm 1.3819 to 1.4016 in. 1.3622 in. Exhaust 41.7 to 42.2 mm 41.2 mm 1.6417 to 1.6614 in.
  • Page 92 M6800 · M6800S · M8200 · M9000, WSM ENGINE Camshaft Item Factory Specification Allowable Limit Camshaft Side Clearance 0.07 to 0.22 mm 0.3 mm 0.0028 to 0.0087 in. 0.0118 in. Camshaft Alignment – 0.01 mm 0.00039 in. Cam Height 37.63 mm 37.13 mm...
  • Page 93 M6800 · M6800S · M8200 · M9000, WSM ENGINE Balancer Shaft Item Factory Specification Allowable Limit Balancer Shaft Side Clearance 0.07 to 0.22 mm 0.3 mm 0.0028 to 0.0087 in. 0.0118 in. Balancer Shaft Alignment – 0.02 mm 0.0008 in.
  • Page 94 M6800 · M6800S · M8200 · M9000, WSM ENGINE Crankshaft Item Factory Specification Allowable Limit Crankshaft Alignment – 0.02 mm 0.00079 in. Crankpin O.D. 52.977 to 52.990 mm – 2.0857 to 2.0862 in. Crankshaft Journal O.D. 74.977 to 74.990 mm –...
  • Page 95 M6800 · M6800S · M8200 · M9000, WSM ENGINE Thermostat Item Factory Specification Allowable Limit 74.5 to 78.5 °C Thermostat Valve Opening Temperature – 166.1 to 173.3 °F 90 °C Temperature at which Thermostat completely Opens – 194 °F W1026075...

  • Page 96: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 97: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM ENGINE 4. CHECKING, DISASSEMBLING AND SERVICING [1] SEPARATING ENGINE FROM TRACTOR Draining Coolant CAUTION • Never remove the radiator cap until coolant temperature is well below its boiling point. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
  • Page 98 57.0 U.S.qts. M9000 47.5 Imp.qts. IMPORTANT • Use only KUBOTA SUPER UDT fluid. Use of other oils may damage the transmisison or hydraulic system. • Refer to “5. LUBRICANTS, FUEL AND COOLANT” at GENERAL Section. • Do not mix different brands fluid together.
  • Page 99 M6800 · M6800S · M8200 · M9000, WSM ENGINE Power Steering Hoses 1. Disconnect the power steering hoses (1), (2). (When reassembling) 24.5 to 29.4 N·m Turning delivery hose Tightening torque 2.5 to 3.0 kgf·m retaining nut 18.1 to 21.7 ft-lbs...
  • Page 100 M6800 · M6800S · M8200 · M9000, WSM ENGINE Steering Wheel, Meter Panel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller (Code No. 07916-51090). 2. Remove the shuttle lever grip (10). 3. Remove the meter panel mounting screw and disconnect the meter cable (9).
  • Page 101 M6800 · M6800S · M8200 · M9000, WSM ENGINE Bonnect Support 1. Remove the bonnet support (1). 2. Remove the support frame (2). (When reassembling) 48.1 to 55.9 N·m Bonnet support mounting 4.9 to 5.7 kgf·m screw 35.4 to 41.2 ft-lbs Tightening torque 48.1 to 55.9 N·m...

  • Page 102: Engine Body

    M6800 · M6800S · M8200 · M9000, WSM ENGINE [2] ENGINE BODY (1) Cylinder Head (A) Checking and Adjusting Compression Pressure 1. After warming up the engine, stop it and remove the air cleaner, the muffler and all nozzle holders.
  • Page 103 M6800 · M6800S · M8200 · M9000, WSM ENGINE Top Clearance 1. Remove the cylinder head (remove the cylinder head gasket completely). 2. Bring the piston to its top dead center fasten 1.5 mm dia. 5 to 7 mm long fuse wires to 3 to 4 spots on the piston top with grease so as to avoid the intake and exhaust valves and the combustion chamber ports.
  • Page 104 M6800 · M6800S · M8200 · M9000, WSM ENGINE Checking Valve Clearance IMPORTANT • Valve clearance must be checked and adjusted when engine is cold. 1. Remove the head cover. 2. Align the 1TC mark of flywheel and the convex of flywheel housing timing windows so that the first piston (gear case side) comes to the compression top dead center.
  • Page 105 M6800 · M6800S · M8200 · M9000, WSM ENGINE (B) Disassembling and Assembling Cylinder Head Cover and Nozzle Holder 1. Remove the injection pipes (1) and overflow pipes (2). 2. Remove the glow plugs (3). 3. Remove the nozzle holder assembly (4) and copper gaskets (5).
  • Page 106 M6800 · M6800S · M8200 · M9000, WSM ENGINE Rocker Arm and Push Rod 1. Remove the rocker arm (1) as a unit. 2. Remove the push rods (2). 3. Remove the bridge arm (4). (When reassembling) • When putting the push rods onto the tappets, check to see if their ends are properly engaged with the grooves.
  • Page 107 M6800 · M6800S · M8200 · M9000, WSM ENGINE Cylinder Head and Tappet (Engine Serial Number : below YY0470) 1. Loosen the pipe band, and remove the water return pipe (1). 2. Disconnect the fuel pipe (3) first and then the fuel filter (2).
  • Page 108 M6800 · M6800S · M8200 · M9000, WSM ENGINE Cylinder Head and Tappet (Engine Serial Number : above YY0471) 1. Loosen the pipe band, and remove the water return pipe (1). 2. Disconnect the fuel pipe (3) first and then the fuel filter (2).
  • Page 109 M6800 · M6800S · M8200 · M9000, WSM ENGINE Selecting Cylinder Head Gasket IMPORTANT • Selecting cylinder head gasket is affected with above YY0471 of engine serial number. • Cylinder Head Gasket between Engine Serial Number : below YY0470 and above YY0471 are NOT convertible. The...
  • Page 110 M6800 · M6800S · M8200 · M9000, WSM ENGINE Valve 1. Remove the valve cap (1) and the valve spring collets (2) compressing the valve spring (4) with the valve spring retainer (3). (When reassembling) • Install the intake valve spring with its small-pitch end downward (at the head side).
  • Page 111 M6800 · M6800S · M8200 · M9000, WSM ENGINE Valve Recessing 1. Clean the cylinder head, the valve face and seat. 2. Insert the valve into the valve guide. 3. Measure the valve recessing with a depth gauge. 4. If the measurement exceeds the allowable limit, replace the valve.
  • Page 112 M6800 · M6800S · M8200 · M9000, WSM ENGINE Clearance between Valve Stem and Valve Guide 1. Remove carbon from the valve guide section. 2. Measure the valve stem O.D. with an outside micrometer. 3. Measure the valve guide I.D. of the cylinder head at the most wear part as shown in the figure below with a small hole gauge.
  • Page 113 M6800 · M6800S · M8200 · M9000, WSM ENGINE Replacing Valve Guide (When removing) 1. Using a valve guide replacing tool, press out the used valve guide. (When installing) 1. Clean a new valve guide, and apply engine oil to it.
  • Page 114 M6800 · M6800S · M8200 · M9000, WSM ENGINE Free Length and Tilt of Valve Spring 1. Measure the free length (A) with vernier calipers. If the measurement is less than the allowable limit, replace it. 2. Put the spring on a surface plate, place a square on the side of the spring, and check to see if the entire side is contact with the square.
  • Page 115 M6800 · M6800S · M8200 · M9000, WSM ENGINE Valve Spring Setting Load 1. Place the valve spring on a tester and compress it to the same length it is actually compressed in the engine. 2. Read the compression load on the gauge.
  • Page 116 M6800 · M6800S · M8200 · M9000, WSM ENGINE 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...

  • Page 117: Timing Gear

    M6800 · M6800S · M8200 · M9000, WSM ENGINE (2) Timing Gear (A) Disassembling and Assembling Injection Pump Unit (Removing the fuel injection pump unit) 1. Detach the gear cover for the fuel injection pump unit from the gearcase. 2. Place the piston of the 4th cylinder at the top dead center in the compression stroke.
  • Page 118 M6800 · M6800S · M8200 · M9000, WSM ENGINE Injection Pump Unit (Continued) (Reassembling the fuel injection pump unit) 1. Place the piston of the 4th cylinder at the top dead center in the compression stroke. Fix the flywheel. 2. Place the injection pump gear (5) back into the gear case position.
  • Page 119 M6800 · M6800S · M8200 · M9000, WSM ENGINE Governor Housing Assembly 1. Remove the injection pump unit from the engine. (See page 1- S32.) 2. Remove the governor lubricating pipe (1). 3. Remove the stop solenoid (2). 4. Detach the sight cover (3) from the injection pump unit.
  • Page 120 M6800 · M6800S · M8200 · M9000, WSM ENGINE Governor Fork Lever Assembly 1. Pull off the governor fork lever shaft (1) with the extra bolt (Dia : 4 mm, Pitch : 0.7 mm, Length : more than 25 mm) (2).
  • Page 121 M6800 · M6800S · M8200 · M9000, WSM ENGINE Governor Lever 1. Remove the speed control lever (1) and the return spring (2). 2. Remove the governor lever assembly (3) from the governor housing. 3. Remove the start spring (4) and the stop spring (5).
  • Page 122 M6800 · M6800S · M8200 · M9000, WSM ENGINE Fuel Camshaft and Governor Weight 1. Separate the governor housing assembly from the injection pump unit. (See page 1-S34.) 2. Remove the governor sleeve (1). 3. Remove the injection pump assembly (2).
  • Page 123 M6800 · M6800S · M8200 · M9000, WSM ENGINE Fuel Camshaft and Governor Weight (Continued) (When reassembling) • Fix the fuel camshaft with lock bolts as the key way of fuel camshaft (10) is upward. • Install the injection pump assembly to the injection pump housing.
  • Page 124 M6800 · M6800S · M8200 · M9000, WSM ENGINE Replacing Injection Pump Assembly (If necessary) • The injection pump can be replaced with the crankshaft in whatever position. 1. Disconnect all injection pipes (1). 2. Disconnect the fuel pipe (2) and fuel overflow pipe (10).
  • Page 125 M6800 · M6800S · M8200 · M9000, WSM ENGINE Installing Procedure of Injection Pump Assembly 1. Install the fuel injection pump assembly (1) in its unit (2), and hook the governor connecting rod to the rack pin of the fuel injection pump assembly.
  • Page 126 M6800 · M6800S · M8200 · M9000, WSM ENGINE Installing Procedure (Continued) 1. Move the stop lever (1) and visually check to see if the fuel injection pump control rack comes smoothly back to the start position by the counter force of the start spring.
  • Page 127 M6800 · M6800S · M8200 · M9000, WSM ENGINE Water Pump 1. Remove the pipe band and the water pipe (1). 2. Remove the water pump (2). (When reassembling) • When mounting the water pump, take care not to forget mounting the O-ring and not to let it out of position.
  • Page 128 M6800 · M6800S · M8200 · M9000, WSM ENGINE Gear Case Cover 1. Remove the gear case cover. (When reassembling) • Confirm that the liquid gasket coating surface is free of water, dust and oil in order to maintain sealing effect.
  • Page 129 M6800 · M6800S · M8200 · M9000, WSM ENGINE Camshaft and Balancer Shaft 1. Remove the camshaft set screws and draw out the camshaft (1). 2. Remove the balancer shaft 1 set screws and draw out the balancer shaft 1 (2).
  • Page 130 M6800 · M6800S · M8200 · M9000, WSM ENGINE (B) Servicing Timing Gear Backlash 1. Set a dial indicator (lever type) with its tip on the gear tooth. 2. Move the gear to measure the backlash, holding its mating gear.
  • Page 131 M6800 · M6800S · M8200 · M9000, WSM ENGINE Camshaft Alignment 1. Support the camshaft with V block on the surface plate and set a dial indicator with its tip on the intermediate journal at right angle. 2. Rotate the camshaft on the V blocks and get the misalignment (half of the measurement).
  • Page 132 M6800 · M6800S · M8200 · M9000, WSM ENGINE Oil Clearance between Idle Gear Shaft 1, 2 and Idle Gear 1, 2 Bushing 1. Measure the idle gear shaft O.D. with an outside micrometer. 2. Measure the idle gear bushing I.D. with an inside micrometer, and calculate the oil clearance.

  • Page 133: Piston And Connecting Rod

    M6800 · M6800S · M8200 · M9000, WSM ENGINE Oil Clearance of Balancer-shaft Journal 1. Measure the balancer shaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. (A), (B) for balancer shaft with an inside micrometer.
  • Page 134 M6800 · M6800S · M8200 · M9000, WSM ENGINE Connecting Rod Cap 1. Remove the connecting rod screws (1) from connecting rod cap. 2. Remove the connecting rod caps. (When reassembling) • Align the marks (a) with each other. (Face the marks toward the injection pump.)
  • Page 135 M6800 · M6800S · M8200 · M9000, WSM ENGINE Piston 1. Turn the flywheel and set a piston to the top dead center. 2. Pull out the piston upward by lightly tapping it from the bottom of the crankcase with the grip of a hammer.
  • Page 136 M6800 · M6800S · M8200 · M9000, WSM ENGINE Piston Ring and Connecting Rod 1. Remove the piston rings using a piston ring tool. 2. Put the fan shaped concave (8) on the piston as shown in figure. 3. Remove the piston pin (1), and separate the connecting rod (7) from the piston (2).
  • Page 137 M6800 · M6800S · M8200 · M9000, WSM ENGINE (B) Servicing Piston Pin Bore I.D. 1. Measure the piston pin bore I.D. in both the horizontal and vertical directions with a cylinder gauge. 2. If the measurement exceeds the allowable limit, replace the piston.
  • Page 138 M6800 · M6800S · M8200 · M9000, WSM ENGINE Clearance between Piston Ring and Groove 1. Remove carbon from the ring grooves. 2. Measure the clearance between the ring and the groove with a feeler gauge or depth gauge. 3. If the clearance exceeds allowable limit, replace the ring since compression leak and oil shortage result.

  • Page 139: Flywheel And Crankshaft

    M6800 · M6800S · M8200 · M9000, WSM ENGINE (4) Flywheel and Crankshaft (A) Disassembling and Assembling Flywheel 1. Install the stopper to the flywheel so that the flywheel does not turn. 2. Remove the PTO propeller shaft spline hub screws.
  • Page 140 M6800 · M6800S · M8200 · M9000, WSM ENGINE Crankcase 1 and Crankcase 2 (When reassembling) • Match the crankcase 1 and 2, referring to the flywheel’s contoured face. Possible gap must be 0.05 mm (0.0020 in.) or smaller. • Tighten up the flywheel housing first to the specified torque. This helps to minimize the level difference between the crankcase 1 and the crankcase 2 (at the flywheel side).
  • Page 141 M6800 · M6800S · M8200 · M9000, WSM ENGINE Crankshaft 1. Remove the main bearing case. 2. Remove the crankshaft. (When reassembling) • Reassemble the main bearing case having the same number as the one engraved on the crankcase, and set the casting mark “F / W SIDE”...
  • Page 142 M6800 · M6800S · M8200 · M9000, WSM ENGINE (B) Servicing Crankshaft Side Clearance 1. Set a dial indicator with its tip on the end of the crankshaft. 2. Measure the side clearance by moving the crankshaft to the front and rear.
  • Page 143 M6800 · M6800S · M8200 · M9000, WSM ENGINE Oil Clearance between Crankpin and Crankpin Bearing 1. Clean the crankpin and crankpin bearing. 2. Put a strip of plastigage (Code No. 07909-30241) 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 144 M6800 · M6800S · M8200 · M9000, WSM ENGINE Oil Clearance between Crankpin and Crankpin Bearing (Continued) IMPORTANT • STD size crankpin bearing for V3300. To replace it with a specific STD service part, make sure the crankpin bearing has the same ID color as the connecting rod.
  • Page 145 M6800 · M6800S · M8200 · M9000, WSM ENGINE Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1. Clean the crankshaft journal and crankshaft bearing. 2. Put a strip of press gauge (Code No.: 07909-30241) on the center of the journal.
  • Page 146 M6800 · M6800S · M8200 · M9000, WSM ENGINE 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 maxiumum and the minimum I.D.’s.
  • Page 147 M6800 · M6800S · M8200 · M9000, WSM ENGINE Correcting Cylinder (Oversize + 0.5 mm) 1. When the cylinder is worn beyond the allowable limit, bore and hone it to the specified dimension. 98.500 to 98.522 mm Cylinder I.D. (2) Factory spec.

  • Page 148: Lubricating System

    M6800 · M6800S · M8200 · M9000, WSM ENGINE [3] LUBRICATING SYSTEM (1) Checking Engine Oil Pressure 1. Remove the oil switch and set a pressure tester (Code No. 07916-32031). 2. Start the engine. After warming up, measure the oil pressure of both idling and rated speeds.

  • Page 149: Servicing

    M6800 · M6800S · M8200 · M9000, WSM ENGINE (3) Servicing 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 allowable limit, replace the oil pump rotor assembly.

  • Page 150: Cooling System

    M6800 · M6800S · M8200 · M9000, WSM ENGINE [4] COOLING SYSTEM (1) Checking and Adjusting Fan Belt Tension 1. Press the fan belt between alternator and crank pulley at force of 98 N (10 kgf, 22 lbs). Check if the fan belt deflection is 10 to 12 mm (0.394 to 0.472 in.) 2.

  • Page 151: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM ENGINE Radiator Water Leakage 1. Pour a specified amount of water into the radiator. 2. Set a radiator tester. Increase water pressure to the specified pressure of 137 kPa (1.4 kgf/cm , 20 psi).

  • Page 152: Fuel System

    M6800 · M6800S · M8200 · M9000, WSM ENGINE [5] FUEL SYSTEM (1) Checking and Adjusting (A) Injection Pump Injection Timing 1. Make sure of matching the injection timing align mark (1) of the injection pump unit and the plate (gearcase), as shown in the illustration.
  • Page 153 M6800 · M6800S · M8200 · M9000, WSM ENGINE (B) Injection Nozzle CAUTION • Check the injection pressure and condition after confirming that there is nobody standing in the direction the fume goes. If the fume from the nozzle directly contacts the human body, cells may be destroyed and blood poisoning may be caused.

  • Page 154: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM ENGINE (2) Disassembling and Assembling Nozzle Holder 1. Secure the nozzle retaining nut (7) with a vise. 2. Remove the nozzle holder (1), and take out parts inside. (When reassembling) • Assemble the nozzle in clean fuel oil.

  • Page 155: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM ENGINE Radial Clearance 1. If the wheel contact to the housing, replace the turbocharger assembly with new one. W1077353 (2) Disassembling and Assembling CAUTION • While the engine is running and or just after it stops, the turbocharger is hot, be careful not to touch the turbocharger.
  • Page 156 M6800 · M6800S · M8200 · M9000, WSM ENGINE Turbocharger 1. Remove the screw (1) and bolt (2). 2. Take off the turbocharger assembly (3). (When reassembling) • Replace the gasket with new one. (1) Screw (3) Turbocharger Assembly (2) Bolt...
  • Page 157 CLUTCH KiSC issued 03, 2008 A...
  • Page 158 MECHANISM CONTENTS 1. TRAVELLING CLUTCH ................2-M1 [1] FEATURES ....................2-M1 [2] TRAVELLING CLUTCH LINKAGE............2-M1 [3] OPERATION .................... 2-M2 2. PTO CLUTCH ....................2-M3 [1] STRUCTURE ................... 2-M3 [2] OIL FLOW ....................2-M3 [3] PTO CLUTCH VALVE................2-M4 [4] SHIFT LINKAGE ..................2-M6 KiSC issued 03, 2008 A...

  • Page 159: Travelling Clutch

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 1. TRAVELLING CLUTCH [1] FEATURES This tractor is used dry single plate type clutch. The clutch is located between the engine and transmission and is operated by stepping on the clutch pedal.

  • Page 160: Operation

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH [3] OPERATION Clutch “Engaged” When the clutch pedal is not depressed, the clutch release bearing (6) and the fingers of diaphragm spring (3) are not connected to each other. Accordingly, the pressure plate (2) is tightly pressed against the flywheel (1) by the diaphragm spring (3).

  • Page 161: Pto Clutch

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 2. PTO CLUTCH [1] STRUCTURE (1) PTO Propeller Shaft (4) Flywheel (7) Clutch Disc (9) Pressure Plate (2) PTO Clutch Pack (5) PTO Spline Hub (8) Drive Plate (10) PTO Shaft...

  • Page 162: Pto Clutch Valve

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH [3] PTO CLUTCH VALVE PTO clutch valve is composed of the following parts. (A) Main Relief Valve PTO clutch inner pressure is kept in approx. 2451 kPa (25 kgf/cm , 355 psi) by the main relief valve.
  • Page 163 M6800 · M6800S · M8200 · M9000, WSM CLUTCH PTO Clutch “Engaged” The oil from power steering controller flows into the clutch valve (1). When the PTO shift lever is set at the “Engaged” position, the spool (2) is turned to A position, then oil flows through the spool (2) into the modulating valve and the clutch pack.

  • Page 164: Shift Linkage

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH PTO Clutch “Disengaged” When the PTO shift lever is set at the “Disengaged” position, the spool (2) is turned to B position, then the oil from the power steering controller is stopped by the spool (2) and the oil in the PTO clutch pack drained into the tank.
  • Page 165 SERVICING CONTENTS 1. TROUBLESHOOTING ..................2-S1 2. SERVICING SPECIFICATIONS ..............2-S2 3. TIGHTENING TORQUES ................2-S3 4. CHECKING, DISASSEMBLING AND SERVICING........2-S4 [1] TRAVELLING CLUTCH ................2-S4 (1) Checking and Adjusting ..............2-S4 (2) Disassembling and Assembling ............2-S5 (3) Servicing ...................2-S10 [2] HYDRAULIC PTO CLUTCH ..............2-S12 (1) Checking and Adjusting ..............2-S12 (2) Disassembling and Assembling ............2-S13 (3) Servicing ...................2-S20...

  • Page 166: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 1. TROUBLESHOOTING TRAVELLING CLUTCH Reference Symptom Probable Cause Solution Page Clutch Drags • Clutch pedal free travel excessive Adjust 2-S4 • Dust on clutch disc generated from clutch Remove rust –...

  • Page 167: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 2. SERVICING SPECIFICATIONS TRAVELLING CLUTCH Item Factory Specification Allowable Limit Clutch Pedal Free Travel 35 to 45 mm – 1.4 to 1.8 in. Clutch Pedal Stopper Bolt Height 18 to 20 mm –...

  • Page 168: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 169: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH 4. CHECKING, DISASSEMBLING AND SERVICING [1] TRAVELLING CLUTCH (1) Checking and Adjusting Clutch Pedal Free Travel 1. Stop the engine and remove the key. 2. Slightly depress the clutch pedal and measure free travel (A) at top of pedal.

  • Page 170: Disassembling And Assembling

    54 L M8200 57.0 U.S.qts. M9000 47.5 Imp.qts. IMPORTANT • Use only KUBOTA SUPER UDT fluid. Use of other oils may damage the transmission or hydraulic system. • Refer to “5. LUBRICANTS, FUEL COOLANT” at GENERAL Section. • Do not mix different brands fluid together.
  • Page 171 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Steering Wheel, Meter Panel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller (Code No. 07916-51090). 2. Remove the shuttle lever grip (10). 3. Remove the meter panel mounting screw and disconnect the meter cable (9).
  • Page 172 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Piping for 3-Point Hydraulic System 1. Remove the accelerator rod (1). 2. Remove the suction pipe (3). 3. Remove the delivery pipe (4) for 3-point hydraulic system. 4. Remove the delivery pipe (2) for power steering.
  • Page 173 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Propeller Shaft (4WD Only) 1. Slide the propeller shaft cover (3), (5) after removing the screws (6). 2. Tap out the spring pin (2), (4) and then slide the coupling (1), (8) to the front and rear.
  • Page 174 M6800 · M6800S · M8200 · M9000, WSM CLUTCH (B) Separating Clutch Assembly Separating the Clutch Assembling 1. Remove the clutch from the flywheel. (When reassembling) • Direct the shorter end of the clutch disc boss toward the flywheel. • Apply molybdenum disulphide (Three Bond 1901 or equivalent) to the splines of clutch disc boss.

  • Page 175: Servicing

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH Release Holder and Clutch Lever 1. Draw out the clutch release holder (5) and the release bearing (2) as a unit. 2. Remove the release fork setting screw (3). 3. Draw out the clutch lever (4) to remove the release fork (1).
  • Page 176 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Clutch Disc Wear 1. Measure the depth from clutch disc surface to the top of rivet at least 10 points with a depth gauge. 2. If the depth is less than the allowable limit, replace the disc.

  • Page 177: Hydraulic Pto Clutch

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH [2] HYDRAULIC PTO CLUTCH (1) Checking and Adjusting Relief Valve Setting Pressure 1. Start the engine and warm up the transmission fluid, and then stop the engine. 2. Remove the plug (4) (PT 1/8) on the PTO valve spool (5).

  • Page 178: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH (2) Disassembling and Assembling (A) Separating PTO Clutch Valve Removing PTO Clutch Valve [M6800(S)] 1. Remove the rear tire (RH). 2. Disconnect the three point hydraulic system delivery pipe (1). 3. Remove the differential lock rod (2).
  • Page 179 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Draining Fuel • See page 3-S7. W1021533 Fuel Tank Connection Hose 1. Remove the cover (2). 2. Remove the connection hose (1). (When reassembling) 77.5 to 90.2 N·m Tightening torque Cover mounting screw 7.9 to 9.2 kgf·m...
  • Page 180 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Housing Cover and Steps 1. Remove the housing cover (1). 2. Remove the steps (2). (1) Housing Cover (2) Steps W1022206 Fuel Tanks 1. Remove the fuel hose (1), (2), (3), (4).
  • Page 181 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Auxiliary Shift Lever [M8200 · M9000] 1. Remove the shift rod (3). 2. Remove the external circlip (2). 3. Take out the shift lever (1). (1) Shift Lever (3) Shift Rod...
  • Page 182 M6800 · M6800S · M8200 · M9000, WSM CLUTCH PTO Clutch Valve 1. Remove the differential lock pedal (3). 2. Disconnect the PTO clutch valve cable (2). 3. Remove the PTO clutch valve (1). (When reassembling) • Apply transmission fluid to O-ring.
  • Page 183 M6800 · M6800S · M8200 · M9000, WSM CLUTCH (C) Disassembling PTO Clutch Pack Clutch Hub and Clutch Discs 1. Remove the internal snap ring (2), and then take out the clutch discs (3), the back plate (7), the steel plates (8), (9), (10), (11), (12), (13), (14), the hub (1) and the bearings (5).
  • Page 184 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Modulating Valve 1. Remove the internal snap ring (1). 2. Remove the spring seat (2). 3. Draw out the spring (3) and piston (4). (1) Internal Snap Ring (3) Spring (2) Spring Seat...

  • Page 185: Servicing

    M6800 · M6800S · M8200 · M9000, WSM CLUTCH (3) Servicing PTO Clutch Disc Wear 1. Measure the thickness of PTO clutch disc with vernier calipers. 2. If the thickness is less than the allowable limit, replace it. 1.70 to 1.90 mm Factory spec.
  • Page 186 M6800 · M6800S · M8200 · M9000, WSM CLUTCH Thickness of Seal Ring 1. Measure the thickness of seal rings (1) with an outside micrometer. 2. If the measurement is less than the allowable limit, replace it. 2.45 to 2.50 mm Factory spec.
  • Page 187 TRANSMISSION KiSC issued 03, 2008 A...
  • Page 188 MECHANISM CONTENTS 1. STRUCTURE ....................3-M1 [1] M6800 ...................... 3-M1 [2] M6800S....................3-M3 [3] M8200 · M9000 ..................3-M5 2. TRAVELLING SYSTEM ................3-M8 [1] MAIN GEAR SHIFT SECTION.............. 3-M8 [2] SHUTTLE SHIFT SECTION ..............3-M12 [3] HI-CREEP SHIFT SECTION (IF EQUIPPED) ........3-M15 [4] FOUR WHEEL DRIVE SECTION (4WD ONLY) .......

  • Page 189: Structure

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 1. STRUCTURE [1] M6800 (1) Main Gear Shift Section (2) Shuttle Shift Section (3) Hi-Creep Shift Section (4) Four Wheel Drive Section (Lo-Reverse) 3-M1 KiSC issued 03, 2008 A...
  • Page 190 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (5) PTO Clutch Section (6) Differential Gear Section (7) PTO Gear Section 3-M2 KiSC issued 03, 2008 A...

  • Page 191: M6800S

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [2] M6800S (1) Shuttle Shift Section (2) Main Gear Shift Section (3) Hi-Low, Creep (Option) Section (4) Four Wheel Drive Section (Forward-Reverse) 3-M3 KiSC issued 03, 2008 A...
  • Page 192 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (5) PTO Clutch Section (6) Differential Gear Section (7) PTO Gear Section 3-M4 KiSC issued 03, 2008 A...

  • Page 193: M8200 · M9000

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [3] M8200 · M9000 (1) Shuttle Shift Section (2) Main Gear Shift Section (3) Hi-Lo, Creep Shift Section (4) PTO Clutch Section (Forward-Reverse) 3-M5 KiSC issued 03, 2008 A...
  • Page 194 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (5) Four Wheel Drive Section (6) Differential Gear Section (7) PTO Gear Section 3-M6 KiSC issued 03, 2008 A...
  • Page 195 Model M6800 is equipped a transmission with 8 forward and 4 reverses. (12 forwards and 4 reverses, if the tractor is equipped creep speed gear.) Model M6800S, M8200 and M9000 are equipped a transmission with 8 forward and 8 reverses. (12 forwards and 12 reverses, if the tractors are equipped creep speed gear.) The travelling system consist of main gear shift section, shuttle shift section (Forward-Reverse), Hi-Low, Creep shift section (If equipped).

  • Page 196: Travelling System

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 2. TRAVELLING SYSTEM [1] MAIN GEAR SHIFT SECTION [M6800] The main shift section uses a constant-mesh (1st - 2nd speed) type and synchromesh (3rd - 4th speed) type transmission. Rotary power which is transmission from the engine...
  • Page 197 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [M6800S] The main shift section uses a synchromesh type transmission. 1st Speed 21T Gear Shaft (8) → 34T Gear (1) → 1st Shaft (2) → Hub (5) → Shifter (6) → 19T Gear (7) → 36T Gear (13) →...
  • Page 198 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Operation of Block-type Synchronizer The coupling (3) is splined to the counter shaft (9) and the shifter (5) is mounted on the coupling. The two synchronizer springs (6) hold the synchronizer keys (4) out against the shifter (5).
  • Page 199 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Second Stage When synchronizer keys (4) are prevented by the synchronizer ring (7) from sliding, the synchronizer keys (4) are disengaged from the shifter (5). The synchronizer keys (4) go into the grooves provided on the...

  • Page 200: Shuttle Shift Section

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [2] SHUTTLE SHIFT SECTION Lo-Reverse Synchro Shuttle [M6800] The shuttle shift section allows the operators to change forward and reverse with an auxiliary speed change lever. It is used synchromesh type gear shift.
  • Page 201 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Forward-Reverse Synchro Shuttle [M6800S] The shuttle shift section allows the operators to change forward and reverse with a shuttle lever. It is used synchromesh type gear shift. It also operates as a reduction until when shifting from forward to reverse.
  • Page 202 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Forward-Reverse Synchro Shuttle [M8200 · M9000] The shuttle shift section allows the operators to change forward and reverse with a shuttle lever. It is used synchromesh type gear shift. Forward Input Shaft (1) → Holder (9) → Shifter (3) → Hub (4) →...

  • Page 203: Hi-Creep Shift Section (If Equipped)

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [3] HI-CREEP SHIFT SECTION (IF EQUIPPED) Hi-Creep Shift [M6800] The Hi-Creep shift section allows the operator to change Hi and Creep with an auxiliary speed change lever. When the auxiliary speed change lever is move to the...
  • Page 204 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Hi-Lo, Creep Shift [M6800S] The Hi-Lo, creep shift section allows the operator to change Hi-Low and creep with an auxiliary speed change lever is move to the Hi-Low or creep position.

  • Page 205: Four Wheel Drive Section (4Wd Only)

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [4] FOUR WHEEL DRIVE SECTION (4WD ONLY) [M6800(S)] 2 wheel drive or 4 wheel drive is selected by changing the position of shifter (2) on the propeller shaft 1 (1) using the front wheel drive lever.

  • Page 206: Pto System

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 3. PTO SYSTEM All models have Live PTO’s (Independent PTO’s) which have their own clutch controls completely separate from the travelling clutch and transmission. Therefore, the PTO can operate while the tractor is stopped and also the PTO can be disengaged and engaged while the tractor is in motion.

  • Page 207: Fixed Pto Shaft Type With Two Speeds

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [2] FIXED PTO SHAFT TYPE WITH TWO SPEEDS (1) PTO Propeller Shaft (4) Coupling (7) PTO Shaft (10) Shifter (2) PTO Clutch (5) Gear Shaft (8) Gear (11) Gear (3) PTO Propeller Shaft 2...

  • Page 208: Interchangeable Pto Shaft Type

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [3] INTERCHANGEABLE PTO SHAFT TYPE By interchanging the PTO shaft (6), two different PTO shaft speeds are available. The power is transmitted as follows. −1 Using 6-Spline PTO Shaft [540 min (rpm)] PTO Transmitting Shaft (1) →...

  • Page 209: Differential Gear

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 4. DIFFERENTIAL GEAR [1] STRUCTURE The differential gear assembly is a mechanism to provide smooth steering. It automatically provides different optimum torques to the right and left wheels according to road resistance and braking friction at the wheels.
  • Page 210 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Differential Lock When resistances to the right and left tires are different due to ground conditions or type of work, the wheel with less resistance slips and prevents the tractor from moving ahead.
  • Page 211 SERVICING CONTENTS 1. TROUBLESHOOTING ..................3-S1 2. SERVICING SPECIFICATIONS ..............3-S2 3. TIGHTENING TORQUES ................3-S5 4. CHECKING, DISASSEMBLING AND SERVICING........3-S7 [1] CLUTCH HOUSING CASE ..............3-S7 (1) Disassembling and Assembling ............3-S7 (2) Servicing ...................3-S32 [2] TRANSMISSION CASE .................3-S33 (1) Disassembling and Assembling ............3-S33 (2) Servicing ...................3-S47 KiSC issued 03, 2008 A...

  • Page 212: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive • Transmission fluid insufficient Replenish G-11 Transmission Noise • Improper backlash between bevel pinion Replace 3-S52, S53 shaft and bevel gear • Improper backlash between differential pinion...

  • Page 213: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 2. SERVICING SPECIFICATIONS [M6800] Item Factory Specification Allowable Limit Shift Fork to Shifter Groove Clearance 0.13 to 0.40 mm 0.8 mm 0.0051 to 0.0157 in. 0.031 in. Spiral Bevel Pinion Shaft Turning Torque 0.69 to 1.96 N·m...
  • Page 214 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [M6800S] Item Factory Specification Allowable Limit Shuttle Shift Rod Length Approx. 160 mm – 6.3 in. Shift Fork to Shifter Groove Shuttle Clearance 0.20 to 0.45 mm 0.80 mm 0.0079 to 0.0177 in.
  • Page 215 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION [M8200 · M9000] Item Factory Specification Allowable Limit Shuttle Rod Length 268 mm – 10.55 in. Shift Fork to Shifter Groove Clearance 0.13 to 0.40 mm 0.8 mm 0.0051 to 0.0157 in.

  • Page 216: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...
  • Page 217 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Item N·m kgf·m ft-lbs Spiral bevel pinion shaft staking nut [M6800(S)] 274.6 to 343.2 28.0 to 35.0 202.5 to 253.2 (Old Type : With Collar) Spiral bevel pinion shaft staking nut [M8200 · M9000] 93.2 to 103.0...

  • Page 218: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 4. CHECKING, DISASSEMBLING AND SERVICING [1] CLUTCH HOUSING CASE (1) Disassembling and Assembling (A) Separating Engine and Clutch Housing Case Draining Transmission Fluid • See page 2-S5. W1011903 Draining Fuel 1. Place oil pans under the fuel tank.
  • Page 219 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Steering Wheel, Meter Panel and Rear Bonnet 1. Remove the steering wheel (1) with a steering wheel puller (Code No. 07916-51090). 2. Remove the shuttle lever grip (10). 3. Remove the meter panel mounting screw and disconnect the meter cable (9).
  • Page 220 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Piping for 3-Point Hydraulic System 1. Remove the accelerator rod (1). 2. Remove the suction pipe (3). 3. Remove the delivery pipe (4) for 3-point hydraulic system. 4. Remove the delivery pipe (2) for power steering.
  • Page 221 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Propeller Shaft (4WD Only) 1. Slide the propeller shaft cover (3), (5) after removing the screws (6). 2. Tap out the spring pin (2), (4) and then slide the coupling (1), (8) to the front and rear.
  • Page 222 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Fuel Tank Connection Hose 1. Remove the cover (2). 2. Remove the connection hose (1). (When reassembling) 77.5 to 90.2 N·m Tightening torque Cover mounting screw 7.9 to 9.2 kgf·m 57.1 to 66.5 ft-lbs...
  • Page 223 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Floor Mat and Housing Cover 1. Remove the floor mat (1). 2. Remove the housing cover (2). (1) Floor Mat (2) Housing Cover W1013885 Pedal Frame [M6800 · M8200· M9000] 1. Disconnect the brake rods (3) (RH and LH).
  • Page 224 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Steps 1. Disconnect the foot accelerator rod (2). 2. Remove the steps (1). (1) Steps (2) Foot Accelerator Rod W1014252 Fuel Tanks 1. Remove the fuel hose (1), (2), (3), (4).
  • Page 225 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Auxiliary Shift Lever [M8200 · M9000] 1. Remove the shift rod (3). 2. Remove the external circlip (2). 3. Take out the shift lever (1). (1) Shift Lever (3) Shift Rod...
  • Page 226 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (B) Disassembling Clutch Housing Case [M6800] Speed Change Cover 1. Remove the speed change cover (1). (When reassembling) • When reassembling the speed change cover (1), set the shifter and fork in neutral position.
  • Page 227 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Disassembling Bearing Holder and 21T Gear Shaft 1. Remove the internal snap ring (9). 2. Tap out the 21T gear shaft with bearing. (When reassembling) • Take care of direction of the oil seal.
  • Page 228 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Shift Rod, Forks (1-2), (3-4) and 2nd Shaft 1. Remove the lock screws (1), and take out the springs (2) and balls (3). 2. Tap out the spring pins from shift forks (4) and (6).
  • Page 229 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Shift Fork H-C, L-R and Shift Fork Rod H-C, L-R 1. Tap out the spring pin (1) and (2). 2. Draw out the shift rod. 3. Take out the shift fork H-C (3) and shift fork L-R (4).
  • Page 230 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Creep Gear and Gear Shaft (If equipped) 1. Tap out the 3rd shaft with gears to the front. 2. Remove the external snap ring (4). 3. Tap out the 15T gear shaft (2).
  • Page 231 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (C) Disassembling Clutch Housing Case [M6800S] Shift Lever 1. Remove the shift lever setting screw (1). 2. Remove the shift lever (2). (1) Setting Screw (2) Shift Lever W1014089 Speed Change Cover 1.
  • Page 232 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Shuttle Case Assembly 1. Loosen only two nuts (1) and five screws (grade 9 is marked) (4) and remove the shuttle case assembly (5) by screwing M8 × Pitch 1.25 screws into holes A and B. Two grade 9 screws (2) and six grade 7 screws (3) are not necessary to remove.
  • Page 233 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Disassembling Shuttle Case Assembly 1. Remove the grade 7 and grade 9 screws. 2. Remove the shuttle case 2 (1). 3. Remove the screw (2). 4. Remove the external snap ring (3).
  • Page 234 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Shift Levers and Bearing Retainer 1. Remove the shift lever stopper (1). 2. Tap out the spring pin (4) from Creep shift lever (2). 3. Draw out the Creep shift lever (2).
  • Page 235 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 2nd Shaft 1. Remove the external snap ring (1). 2. Tap out the 2nd shaft (11) to the rear. 3. Remove the external snap ring (9) with tap out the 2nd shaft (11) to the rear.
  • Page 236 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Shift Fork H-L, C and Shift Fork Rod H-L, C 1. Remove the lock screws (1) and take out the springs (2) and balls (3). 2. Tap out the spring pin (5).
  • Page 237 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Creep Gear and 3rd Shaft 1. Tap out the 3rd shaft (10) with gears to the front. 2. Remove the external snap ring (26). 3. Tap out the 15T gear shaft (21).
  • Page 238 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Front Drive Shaft 1. Remove the gear case (1) from the clutch housing. 2. Remove the internal snap ring (2), and tap out the idle shaft (4). 3. Remove the oil seal (7) and internal snap ring (8).
  • Page 239 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Bearing Holder 1. Remove the bearing holder (1) with the shaft (2) by screwing M8 × Pitch 1.25 screws into holes A and B. (When reassembling) • Apply grease or transmission fluid to the O-ring.
  • Page 240 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Disassembling Auxiliary Shift Section 1. Take out the PTO propeller shaft. 2. Remove the bearing holder (7) mounting screw. 3. Remove the auxiliary shift section assembly. (When reassembling) • Direct the grooved side of the thrust collar (12) to the gear side.
  • Page 241 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 1st Shaft 1. Tap out the spring pin (33) from shift fork (32). 2. Remove the bolt (30), and take out the ball and spring. 3. Take out the pin (34) and ball from hole.
  • Page 242 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 1st Shaft (Continued) (When reassembling) • Apply molybdenum disulfide (Three Bond 1901 or equivalent) to inner surface of 26T gear (14) and 30T gear (17). • Be sure to assembling the F-R synchronizer unit, align the oil groove (36) on the hub (20) and synchronizer pin 1 (21) as shown in the figure.

  • Page 243: Servicing

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION 18T Gear Shaft and 25T Idle Gear 1. Remove the external snap ring (1) and ball bearing (2). 2. Take out the 25T-23T gear (4). 3. Remove the external snap ring (17).

  • Page 244: Transmission Case

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Clearance between Shift Fork and Shifter Groove 1. Measure the width of shift fork. 2. Measure the shifter groove width, and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace them.
  • Page 245 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Muffler and Bonnet 1. Remove the muffler (1). 2. Remove the bonnet (2). 3. Disconnect the battery’s cable. 4. Disconnect the head light 3P connectors. 5. Remove the front lower cover (4) and side cover (5).
  • Page 246 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Propeller Shaft (4WD Only) 1. Slide the propeller shaft cover (3), (5) after removing the screws (6). 2. Tap out the spring pin (2), (4) and then slide the coupling (1), (8) to the front and rear.
  • Page 247 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Rear Wheel and Fenders 1. Place disassembling stand under the transmission case. 2. Remove the three point linkage (4). 3. Remove the rear wheel (3). 4. Disconnect the 6P connector for hazard and tail light.
  • Page 248 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Fuel Tanks 1. Remove the fuel hose (1), (2), (3), (4). 2. Remove the tank bands (6). 3. Remove the fuel tanks (5). (1) Fuel Hose 1 (4) Fuel Hose 4...
  • Page 249 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Auxiliary Shift Lever [M8200 · M9000] 1. Remove the shift rod (3). 2. Remove the external circlip (2). 3. Take out the shift lever (1). (1) Shift Lever (3) Shift Rod...
  • Page 250 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION (B) Disassembling Transmission Case Hydraulic Cylinder Assembly 1. Remove the lift rods from lift arms. 2. Remove the hydraulic cylinder assembly mounting screws and nuts. 3. Support the hydraulic cylinder assembly with nylon lift strap and hoist, and then remove it.
  • Page 251 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION PTO Gear Case Assembly 1. Remove the PTO gear case and PTO drive shaft as a unit. (When reassembling) • Apply liquid gasket (Three Bond 1216 or equivalent) to joint face of the PTO gear case and transmission case.
  • Page 252 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Disassembling PTO Gear Case [Fixed PTO Shaft Type with Two Speeds] 1. Remove the PTO case cover mounting screws and then remove the PTO gear case cover (6). 2. Remove the stake of the staking nut (8), and then remove it.
  • Page 253 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Differential Lock Fork [M6800(S)] 1. Remove the clevis pin (1). 2. Remove the plug (2) and take out the adjusting shims (3). 3. Remove the spring holder mounting nuts. 4. Tap out the differential lock shaft (5) with the spring holder (4).
  • Page 254 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Differential Lock Fork [M8200 · M9000] 1. Remove the differential lock rod (1). 2. Remove the clevis pin (3) and plug (6). 3. Draw out the differential lock shaft (5). 4. Take out the differential lock fork (4) and spring (2).
  • Page 255 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Differential Gear Assembly [M8200 · M9000] 1. Remove the differential support (1), noting the number of shims (2). 2. Take out the differential gear assembly (3) from transmission case. 3. Remove the internal snap ring (5) noting the number of shims (4).
  • Page 256 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Differential Pinion Shaft and Differential Pinion 1. Draw out the differential pinion shaft 2 (5), and take out the differential pinion (3) and differential pinion washer (4). 2. Draw out the differential pinion shaft (1), and take out the differential pinion (2) and differential pinion washer.
  • Page 257 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION PTO Clutch Valve 1. Remove the differential lock pedal (3). 2. Disconnect the PTO clutch valve cable (2). 3. Remove the PTO clutch valve (1). (When reassembling) • Apply transmission fluid to O-ring.

  • Page 258: Servicing

    M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Spiral Bevel Pinion Shaft 1. Remove the stake of staking nut (1). 2. Set the staking nut locking wrench (2). 3. Set the spiral bevel pinion shaft turning wrench. 4. Turn the spiral bevel pinion shaft turning wrench to the counterclockwise, then remove it.
  • Page 259 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION IMPORTANT • When reassembling spiral bevel pinion shaft and differential assembly, be sure to adjust the following. - Turning torque of spiral bevel pinion shaft only. - Turning torque of spiral bevel pinion shaft and differential assembly combined.
  • Page 260 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Turning Torque of Spiral Bevel Pinion Shaft Only (New Type : Without Collar) 1. Reassemble the spiral bevel pinion shaft and tighten the staking nut (2) with locking wrench and turning wrench.
  • Page 261 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Turning Torque of Spiral Bevel Pinion Shaft and Differential Assembly Combined (Old Type : With Collar) 1. Reassemble the differential assembly with left and right shims (3) same as before disassembling.
  • Page 262 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Turning Torque of Spiral Bevel Pinion Shaft and Differential Assembly Combined (New Type : Without Collar) 1. Reassemble the differential assembly with shim 1 (1) and shim 2 (3) same as before disassembling.
  • Page 263 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Backlash and Tooth Contact between Spiral Bevel Gear and Spiral Bevel Pinion Shaft 1. Set the dial indicator (lever type) with its finger on the tooth surface. 2. Measure the backlash by fixing the spiral bevel pinion shaft (1) and moving the spiral bevel gear (2) by hand.
  • Page 264 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION More than 35 % red lead contact area on the gear tooth surface. The center of tooth contact at 1/3 of the entire width from the small end. (A) Proper Contact...
  • Page 265 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Clearance between Differential Case Bore (Differential Case Cover Bore) and Differential Side Gear Boss 1. Measure the bore I.D. of the differential case and differential case cover. 2. Measure the differential side gear boss O.D. and calculate the clearance.
  • Page 266 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Clearance between Differential Case Bore (Differential Case Cover Bore) and Differential Side Gear Boss (Continued) [M8200 · M9000] 0.070 to 0.169 mm Clearance between Factory spec. 0.00276 to 0.00665 in. differential case bore and differential side gear 0.35 mm...
  • Page 267 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Backlash between Differential Pinion and Differential Side Gear 1. Set a dial indicator (lever type) on the tooth of the differential pinion. 2. Hold the differential side gear and move the differential pinion to measure the backlash.
  • Page 268 M6800 · M6800S · M8200 · M9000, WSM TRANSMISSION Clearance of Differential Lock Shifter [M8200 · M9000] 1. Measure the clearance (A) between differential lock shifter and differential case when the differential lock pedal OFF position. 2. If the measurement is not within the factory specifications, adjust with adjusting shim (2).

  • Page 269: Rear Axle

    REAR AXLE KiSC issued 03, 2008 A...
  • Page 270 MECHANISM CONTENTS 1. FEATURES ....................4-M1 2. FINAL REDUCTION SYSTEM ..............4-M3 KiSC issued 03, 2008 A...
  • Page 271 M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 1. FEATURES [M6800(S)] (1) Rear Axle (6) Differential Case (10) Differential Gear (14) 25T Planetary Gear (2) Rear Axle Case (7) Differential Side Gear (11) 39T Bevel Gear (15) 65T Internal Gear...
  • Page 272 M6800 · M6800S · M8200 · M9000, WSM REAR AXLE [M8200 · M9000] (1) Rear Axle (5) 65T Internal Gear (9) Differential Side Gear (12) 35T Bevel Gear (2) Rear Axle Case (6) 26T Planetary Gear (10) Differential Pinion Gear...
  • Page 273 M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 2. FINAL REDUCTION SYSTEM The final reduction system has a planetary gear system. It is compact, and is durable under heavy loads since torque loads are spread over three gears, decreasing the load on each tooth.
  • Page 274 SERVICING CONTENTS 1. TROUBLESHOOTING ..................4-S1 2. SERVICING SPECIFICATIONS ..............4-S2 3. TIGHTENING TORQUES ................4-S3 4. CHECKING, DISASSEMBLING AND SERVICING........4-S4 [1] DISASSEMBLING AND ASSEMBLING..........4-S4 (1) Separating Rear Axle Case from Transmission Case ......4-S4 (2) Disassembling Rear Axle Case [Type 1 : M6800(S) · M8200 · M9000] ..........4-S5 (3) Disassembling Rear Axle Case [Type 2 : M8200 ·...

  • Page 275: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 1. TROUBLESHOOTING [M6800(S)] Reference Symptom Probable Cause Solution Page Excessive or • Improper backlash between planetary gear Replace 4-S7 Unusual Noise at All and internal gear Time • Bearing worn Replace –...

  • Page 276: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 2. SERVICING SPECIFICATIONS Type 1: M6800(S) Item Factory Specification Allowable Limit Internal Gear to Planetary Gear Backlash 0.08 to 0.30 mm 0.5 mm 0.0032 to 0.0118 in. 0.020 in. Planetary Gear Thrust Collar Thickness 1.55 to 1.65 mm...
  • Page 277 M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 278: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE 4. CHECKING, DISASSEMBLING AND SERVICING [1] DISASSEMBLING AND ASSEMBLING (1) Separating Rear Axle Case from Transmission Case Draining Transmission Fluid • See page 2-S5. W1011635 Rear Wheel and Fenders 1. Place disassembling stand under the transmission case.

  • Page 279: Disassembling Rear Axle Case [Type 1 : M6800(S) · M8200 · M9000]

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE (2) Disassembling Rear Axle Case [Type 1 : M6800(S) · M8200 · M9000] Brake Plate and Planetary Gear Support 1. Remove the brake plate (1). 2. Remove the external snap ring (2) (M6800(S)) or the retainer mounting screw (4) (M8200, M9000).

  • Page 280: Rear Axle Shaft [M6800(S)]

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE Planetary Gear Support 1. Remove the retainer mounting screw (1). 2. Carefully remove the planetary gear support (2). 3. Remove the internal gear (3). 89.2 to 104.0 N·m Tightening torque Retainer mounting screw 9.1 to 10.6 kgf·m...

  • Page 281: Rear Axle Shaft [M8200 · M9000]

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE (5) Rear Axle Shaft [M8200 · M9000] Rear Axle 1. Remove the external snap ring (1). 2. Tap out the rear axle (2). (When reassembling) • Apply grease to the seal lips.

  • Page 282: Type 2 [M8200 · M9000]

    M6800 · M6800S · M8200 · M9000, WSM REAR AXLE Clearance between Planetary Gear and Planetary Gear Shaft 1. Measure the planetary gear shaft O.D. (rubbing surface). 2. Measure the planetary gear I.D. (rubbing surface). 3. Measure the O.D. of the two needles installed diagonally in the needle bearing.
  • Page 283 BRAKES KiSC issued 03, 2008 A...
  • Page 284 MECHANISM CONTENTS 1. FEATURES ....................5-M1 2. OPERATION ....................5-M2 KiSC issued 03, 2008 A...
  • Page 285 M6800 · M6800S · M8200 · M9000, WSM BRAKES 1. FEATURES (1) Brake Case (4) Brake Pedal (7) Turnbuckle (9) Parking Brake Lever (2) Brake Cam Lever (5) Brake Rod (8) Parking Brake Rod (10) Parking Brake Rod (3) Parking Brake Lever (6) Brake Lever This is used hanging type brake pedals to have wider space of the platform.
  • Page 286 M6800 · M6800S · M8200 · M9000, WSM BRAKES 2. OPERATION (1) Cam Plate (4) Brake Case (7) Brake Cam Lever (9) Rear Axle Case (2) Steel Plate (5) Steel Ball (8) Brake Shaft (10) Transmission Case (3) Brake Disc (6) Brake Cam The brakes are provided on the brake shaft (8) through which power is transmitted to the final reduction system.
  • Page 287 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 Rear Axle Case from Transmission Case ......5-S5 (2) Disassembling Brake Case..............5-S6 [3] SERVICING ....................5-S7 KiSC issued 03, 2008 A...
  • Page 288 M6800 · M6800S · M8200 · M9000, WSM BRAKES 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Uneven Braking • Brake pedal free travel unevenly adjusted Adjust 5-S4 Force • Brake disc worn Replace 5-S7 • Cam plate warped Replace...

  • Page 289: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM BRAKES 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Brake Pedal Free Travel 40 to 45 mm – 1.6 to 1.8 in. Parking Brake Rod (Hand Lever Type Length Parking Brake Model)

  • Page 290: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM BRAKES 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...
  • Page 291 M6800 · M6800S · M8200 · M9000, WSM BRAKES 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Brake Pedal Free Travel CAUTION • Stop the engine and remove the key, then choke the wheel before checking brake pedal. 1. Release the parking brake.

  • Page 292: Separating Rear Axle Case From Transmission Case

    M6800 · M6800S · M8200 · M9000, WSM BRAKES [2] DISASSEMBLING AND ASSEMBLING (1) Separating Rear Axle Case from Transmission Case Draining Transmission Fluid • See page 2-S5. W1011635 Rear Wheel and Fenders 1. Place disassembling stand under the transmission case.

  • Page 293: Disassembling Brake Case

    M6800 · M6800S · M8200 · M9000, WSM BRAKES (2) Disassembling Brake Case Brake Cam Plate 1. Remove the return spring (1). 2. Remove the brake cam plate (2). (When reassembling) • Apply grease to the brake ball seats. (Do not grease excessively.)
  • Page 294 M6800 · M6800S · M8200 · M9000, WSM BRAKES [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.
  • Page 295 M6800 · M6800S · M8200 · M9000, WSM BRAKES Plate Wear 1. Measure the plate thickness with vernier calipers. 2. If the measurement is less than the allowable limit, replace it. 2.25 to 2.35 mm Factory spec. 0.0886 to 0.0925 in.

  • Page 296: Front Axle

    FRONT AXLE KiSC issued 03, 2008 A...
  • Page 297 MECHANISM CONTENTS 1. STRUCTURE ....................6-M1 [1] 2 WHEEL DRIVE TYPE ................ 6-M1 [2] 4 WHEEL DRIVE TYPE ................ 6-M2 2. FRONT WHEEL ALIGNMENT ..............6-M4 KiSC issued 03, 2008 A...
  • Page 298 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 1. STRUCTURE The front axle supports the front of tractor and facilitates steering. There are two kinds of front axles. The two-wheel drive axle has free-running front wheels and four-wheel drive axle has powered front wheels.
  • Page 299 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [2] 4 WHEEL DRIVE TYPE [M6800(S)] (1) Front Axle Case Support (8) 34T Bevel Gear (15) Differential Yoke Shaft (22) Bracket (Front) (2) 19T Bevel Gear (9) Front Axle Case Cover...
  • Page 300 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [M8200 · M9000] (1) Front Axle Case Support (8) 34T Bevel Gear (15) Differential Yoke Shaft (22) Bracket (Front) (2) 19T Bevel Gear (9) Front Axle Case Cover (16) Front Differential Case...

  • Page 301: Front Wheel Alignment

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 2. FRONT WHEEL ALIGNMENT To assure smooth mobility or maneuverability and enhance stable and straight running, the front wheels are mounted at an angle to the right, left and forward directions. This arrangement is referred to as the Front Wheel Alignment.
  • Page 302 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Toe-in Viewing the front wheels from above reveals that the distance between the toes of the front wheels is smaller than that between the heels. It is called toe-in. The front wheels tend to roll outward due to the camber, but toe-in offsets it and ensures parallel rolling of the wheels.

  • Page 303: Servicing

    SERVICING CONTENTS 1. TROUBLESHOOTING ..................6-S1 2. SERVICING SPECIFICATIONS ..............6-S2 3. TIGHTENING TORQUES ................6-S5 4. CHECKING, DISASSEMBLING AND SERVICING........6-S6 [1] CHECKING AND ADJUSTING ...............6-S6 [2] DISASSEMBLING AND ASSEMBLING..........6-S8 (1) Separating Front Axle [2WD Type] .............6-S8 (2) Separating Front Axle [4WD Type] .............6-S8 (3) Disassembling Front Axle [2WD Type] ..........6-S10 (4) Disassembling Front Axle [4WD Type] ..........6-S12 [3] SERVICING ....................6-S18...

  • Page 304: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Front Wheels • Tire pressure uneven Adjust G-58 Wander to Right or • Improper toe-in adjustment (improper Adjust 6-S6 Left alignment) • Clearance between front axle case boss and...

  • Page 305: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 2. SERVICING SPECIFICATIONS [2WD TYPE] Item Factory Specification Allowable Limit Front Wheel Alignment Toe-in 1.0 to 5.0 mm – 0.04 to 0.20 in. Front Wheel Steering Angle 0.925 to 0.960 rad –...
  • Page 306 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [4WD TYPE] Item Factory Specification Allowable Limit Front Wheel Alignment Toe-in 2.0 to 8.0 mm – 0.078 to 0.315 in. Front Wheel Steering Angle 0.840 to 0.873 rad – 48 to 50 °...
  • Page 307 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [4WD TYPE] (Continued) Item Factory Specification Allowable Limit Planetary Gear, Needle Bearing and Shaft Clearance 0.009 to 0.046 mm 0.3 mm 0.00035 to 0.00181 in. 0.012 in. Shaft O.D. 24.991 to 25.000 mm –...

  • Page 308: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.)

  • Page 309: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE 4. CHECKING, DISASSEMBLING AND SERVICING [1] CHECKING AND ADJUSTING Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position.
  • Page 310 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Adjusting Front Axle Pivot 1. Jack up the tractor body, then loosen the front axle rocking force adjusting lock nut (2). 2. Measure the adjusting screw tightening torque. 3. If tightening torque is not within the factory specifications, adjust the front axle rocking force adjusting screw (1).

  • Page 311: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [2] DISASSEMBLING AND ASSEMBLING (1) Separating Front Axle [2WD Type] Front Wheel and Power Steering Hoses 1. Check the front axle and engine are securely mounted on the disassembly stand.
  • Page 312 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Draining Front Differential Case Oil 1. Place oil pan underneath the differential case. 2. Remove the drain plug (1) and filling plug (2) to drain the oil. 3. After draining, reinstall the drain plug (1) and filling plug (2).

  • Page 313: Disassembling Front Axle [2Wd Type]

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Front Axle 1. Place a disassembling stand under the front axle case and support it with a jack. 2. Loosen the lock nut (1) and remove the spring (2). 3. Remove the bracket (front) mounting screws and nuts.
  • Page 314 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Tie-rod 1. Pull out the cotter pin and loosen the tie-rod end nut. 2. Disconnect the tie-rod (1) with a tie-rod end lifter (2) (Code No. 07909-39051). 3. Remove the tie-rod end nut and tie-rod end.

  • Page 315: Disassembling Front Axle [4Wd Type]

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Steering Cylinder 1. Remove the cylinder cover. 2. Disconnect the power steering hoses (3). 3. Remove the cylinder clamps (1). 4. Take out the steering cylinder (2). (When reassembling) 34.3 to 39.2 N·m Steering cylinder mounting 3.5 to 4.0 kgf·m...
  • Page 316 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Bevel Gear Case 1. Separate the bevel gear case (3) from front wheel case (4). 2. Remove the front wheel case support (1). 3. Loosen the bearing retainer (2) mounting screws.
  • Page 317 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Front Wheel Case 1. Remove the internal snap ring (13). 2. Remove the cap (12) which is installed in the bottom of front wheel case. 3. Remove the internal snap ring (11) and take out the adjusting shims (10).
  • Page 318 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Planetary Gear 1. Remove the external snap ring (1). 2. Remove the planetary gear support assembly. 3. Tap the spring pin (6) into the planetary gear shaft (5). 4. Draw out the planetary gear shaft (5), and remove the planetary gear (3).
  • Page 319 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Front Axle 1. Tap out the front axle from front wheel case cover. (When reassembling) • Apply grease to the front axle oil seal. W1017050 (1) Straight Pin (2) O-ring...
  • Page 320 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Pinion Bearing Case 1. Remove the pinion bearing case mounting screws. 2. Remove the pinion bearing case. 103.0 to 117.7 N·m screw 10.5 to 12.0 kgf·m · 9T 75.9 to 86.8 ft-lbs...

  • Page 321: Servicing

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE [3] SERVICING (1) 2WD Type Clearance between Front Axle Middle Boss and Bracket Bushing 1. Measure the front axle middle boss O.D. at several points where it contacts with the bushings.

  • Page 322: 4Wd Type

    M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE (2) 4WD Type Backlash and Tooth Contact between Bevel Pinion Shaft and Bevel Gear 1. Set a dial indicator (lever type) with its finger on the tooth surface. 2. Measure the backlash by fixing the bevel pinion shaft (5) and moving the bevel gear (3) by hand.
  • Page 323 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Clearance between Differential Case and Differential Side Gear 1. Measure the differential side gear boss O.D.. 2. Measure the differential case bore I.D. and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace it.
  • Page 324 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Bearing Retainer and Front Wheel Case Support Bushing 1. Visually inspect the DX bushings for signs of wear or damage. (The DX bushing tends to show concentrated wear.) 2. If the DX bushing is worn beyond the alloy portion (A), replace it.
  • Page 325 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Backlash of Bevel Gear in Bevel Gear Case 1. Set a dial indicator (lever type) on the shaft (Kingpin). 2. Move the shaft (Kingpin) by hand and measure the circumferential play of the shaft.
  • Page 326 M6800 · M6800S · M8200 · M9000, WSM FRONT AXLE Backlash of Bevel Gear in Front Wheel Case 1. Set a dial indicator (lever type) on the shaft (Kingpin). 2. Move the shaft (Kingpin) by hand and measure the circumferential play of the shaft.
  • Page 327 STEERING KiSC issued 03, 2008 A...
  • Page 328 MECHANISM CONTENTS 1. STEERING MECHANISM ................7-M1 2. POWER STEERING HYDRAULIC CIRCUIT ..........7-M2 3. POWER STEERING SYSTEM HYDRAULIC PUMP ......... 7-M3 4. STEERING CONTROLLER ................7-M5 [1] CONTROL VALVE .................. 7-M5 [2] METERING DEVICE (GEROTOR) ............7-M6 [3] OIL FLOW ....................7-M7 5.

  • Page 329: Steering Mechanism

    M6800 · M6800S · M8200 · M9000, WSM STEERING 1. STEERING MECHANISM (1) Hydraulic Pump (3) Steering Cylinder (5) Power Steering Pipe (6) Magnet Filter (2) Steering Controller (4) Power Steering Hose All models are provided with a full hydrostatic power steering. Generally power steerings are divided into 4 types : booster type, integral type, semi-integral type and full hydrostatic type.

  • Page 330: Power Steering Hydraulic Circuit

    M6800 · M6800S · M8200 · M9000, WSM STEERING 2. POWER STEERING HYDRAULIC CIRCUIT (1) Hydraulic Pump (3) Steering Cylinder (5) Check Valve (6) Control Valve (2) Steering Controller (4) Gerotor Hydraulic Oil Flow When the engine starts, the hydraulic pump (1) of the power steering system pressure-feeds the oil drawn from the transmission case through the suction pipe.

  • Page 331: Power Steering System Hydraulic Pump

    M6800 · M6800S · M8200 · M9000, WSM STEERING 3. POWER STEERING SYSTEM HYDRAULIC PUMP The power steering system hydraulic pump pressure- feeds the oil sucked from the transmission case to the steering cylinder through the steering controller. The hydraulic pump is driven by the idle gear.
  • Page 332 M6800 · M6800S · M8200 · M9000, WSM STEERING Pressure Loading System pressure loading system automatically decreases the clearance between the gear and the bushing (1). A small amount of pressure oil is fed behind the bushings, pressing them against the gears and forming a tighter seal against leakage.

  • Page 333: Steering Controller

    M6800 · M6800S · M8200 · M9000, WSM STEERING 4. STEERING CONTROLLER The steering controller mainly consists of a control valve, a metering device and a relief valve. The metering device comprises a set of special gear called “Gerotor”. (1) Dowel Pin...

  • Page 334: Metering Device (Gerotor)

    M6800 · M6800S · M8200 · M9000, WSM STEERING [2] METERING DEVICE (GEROTOR) All oil sent from the hydraulic pump to the steering cylinder, passes through the metering device (Gerotor). Namely, when the rotor is drive, three chambers suck in oil due to volumetric change in the pump chambers formed between the rotor (2) and the stator (3), while oil is discharged from other three chambers.

  • Page 335: Oil Flow

    M6800 · M6800S · M8200 · M9000, WSM STEERING [3] OIL FLOW Neutral Position (1) Passage (4) Passage (7) Spool Groove (10) Passage (2) Passage (5) Passage (8) Sleeve (11) Gerotor (3) Passage (6) Spool (9) Spool Groove When the steering wheel is not turned, the control valve is kept in neutral position by the centering spring.
  • Page 336 M6800 · M6800S · M8200 · M9000, WSM STEERING Right Turning (1) Passage (4) Passage (7) Spool (10) Spool Groove (2) Passage (5) Passage (8) Sleeve (11) Passage (3) Passage (6) Spool Groove (9) Passage (12) Gerotor 1. When the operator attempts to turn the steering wheel clockwise, only the spool (7) is rotated a small amount overcoming the force of the centering spring, thereby causing a relative displacement between the spool (7) and the sleeve (8).
  • Page 337 M6800 · M6800S · M8200 · M9000, WSM STEERING Left Turning Operation mechanism for left turning is the same as that for right turning, except for directions of oil flow from and to the steering cylinder. Manual Operation (1) Check Valve...

  • Page 338: Steering Cylinder

    M6800 · M6800S · M8200 · M9000, WSM STEERING 5. STEERING CYLINDER (1) Rubber Boots (4) Guide (7) Rod (9) Slipper Seal (2) Scraper Seal (5) Bushing (8) Piston (10) O-ring (3) Oil Seal (6) O-ring 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 339 SERVICING CONTENTS 1. TROUBLESHOOTING ..................7-S1 2. SERVICING SPECIFICATIONS ..............7-S2 3. TIGHTENING TORQUES ................7-S3 4. CHECKING, DISASSEMBLING AND SERVICING........7-S4 [1] POWER STEERING HYDRAULIC PUMP ..........7-S4 (1) Checking and Adjusting ..............7-S4 (2) Disassembling and Assembling ............7-S5 (3) Servicing .....................7-S7 [2] RELIEF VALVE ..................7-S8 (1) Checking and Adjusting ..............7-S8 (2) Disassembling and Assembling ............7-S9 [3] STEERING CONTROLLER ..............7-S9...

  • Page 340: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM STEERING 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Tractor Cannot Be • Drive shaft in the power steering body Reassemble 7-S11, S12, Steered improper assembled • Pipe broken Replace – Hard Steering •...

  • Page 341: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM STEERING 2. SERVICING SPECIFICATIONS HYDRAULIC PUMP Item Factory Specification Allowable Limit Hydraulic Pump Delivery Above Condition 20.8 L/min. 17.3 L/min. • Engine Speed 5.5 U.S.gals./min. 4.6 U.S.gals./min. −1 Approx. 2600 min (rpm) 4.6 Imp.gals./min.

  • Page 342: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM STEERING 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 343: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM STEERING 4. CHECKING, DISASSEMBLING AND SERVICING [1] POWER STEERING HYDRAULIC PUMP (1) Checking and Adjusting Hydraulic Flow Test IMPORTANT • When using flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with the flowmeter.

  • Page 344: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM STEERING (2) Disassembling and Assembling IMPORTANT • The hydraulic pump is precision machined and assembled : if disassembled once, it may be unable to maintain its original performance. Therefore, when the hydraulic pump fails, replacement should be carried out with the hydraulic pump assembled except when emergency repair is unavoidable.
  • Page 345 M6800 · M6800S · M8200 · M9000, WSM STEERING Separating Power Steering Hydraulic Pump [Individual Flow Type] 1. Put the parting marks (1), (2), (3), (4) on the flange (5), front housing (6), center plate (7), housing (8) and housing cover (9).

  • Page 346: Servicing

    M6800 · M6800S · M8200 · M9000, WSM STEERING Disassembling Power Steering Hydraulic Pump [Combined Flow Type] 1. Put parting mark (A), (B), on the flange (3), housing (8) and housing cover (11). 2. Remove the housing cover (11) and housing (8).

  • Page 347: Relief Valve

    M6800 · M6800S · M8200 · M9000, WSM STEERING Bushing Length 1. Measure the bushing length with an outside micrometer. 2. If the length is less than the allowable limit, replace it. 18.965 mm Bushing length Allowable limit 0.74665 in.

  • Page 348: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM STEERING (2) Disassembling and Assembling Relief Valve Assembly 1. Remove the adjust plug (3) and draw out the spring (2) and poppet (1). (When reassembling) • Take care not to damage the O-ring.
  • Page 349 M6800 · M6800S · M8200 · M9000, WSM STEERING Piping for Power Steering 1. Disconnect the turning delivery hoses (2) and (3). 2. Disconnect the main delivery pipe (4). 3. Disconnect the return pipe (1). 4. Remove the steering controller mounting screws.
  • Page 350 M6800 · M6800S · M8200 · M9000, WSM STEERING (B) Disassembling Steering Controller Removing Gerotor 1. Secure the housing (3) in a vise and remove seven gerotor mounting screws and gerotor assembly (1). 2. Remove the distributor plate (11) and drive shaft (2).
  • Page 351 M6800 · M6800S · M8200 · M9000, WSM STEERING Grand Seal, Needle Bearing, Sleeve and Spool 1. Remove the retaining ring (1) with a screw driver. 2. Hold the control valve unit vertically and spool and sleeve align the cross pin parallels to flat side of housing (flow priority valve mounting side), the cross pin is visible through open end of spool.

  • Page 352: Steering Cylinder

    M6800 · M6800S · M8200 · M9000, WSM STEERING Sleeve and Spool 1. Draw out the dowel pin (1). 2. Draw out the spool (3) from the sleeve (2). 3. Push out the centering spring (4). IMPORTANT • As the clearance between the sleeve (2) and spool (3) is very narrow, draw out the spool by turning it slowly with due care.
  • Page 353 M6800 · M6800S · M8200 · M9000, WSM STEERING Steering Cylinder 1. Remove the cylinder cover. 2. Disconnect the power steering hoses (3). 3. Remove the cylinder clamps (1). 4. Take out the steering cylinder (2). (When reassembling) 34.3 to 39.2 N·m Steering cylinder mounting 3.5 to 4.0 kgf·m...

  • Page 354: Servicing

    M6800 · M6800S · M8200 · M9000, WSM STEERING Power Steering Hoses and Cylinder 1. Remove the cylinder cover (3), (6). 2. Disconnect the power steering hoses (1), (2). 3. Remove the cylinder bracket (4), (5). 4. Take out the cylinder.
  • Page 355 M6800 · M6800S · M8200 · M9000, WSM STEERING Clearance between Rod and Bushing 1. Measure the bushing I.D. with a cylinder gauge. 2. Measure the rod O.D. with an outside micrometer, and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace as a unit.

  • Page 356: Hydraulic System

    HYDRAULIC SYSTEM KiSC issued 03, 2008 A...
  • Page 357 MECHANISM CONTENTS 1. THREE POINT HYDRAULIC SYSTEM............8-M1 2. HYDRAULIC CIRCUIT FOR THREE POINT HYDRAULIC SYSTEM..8-M2 3. HYDRAULIC PUMP ..................8-M4 4. OIL FILTER ....................8-M6 5. POSITION CONTROL VALVE ..............8-M7 [1] M6800(S) ....................8-M7 [2] M8200 · M9000 ..................8-M9 6.

  • Page 358: Three Point Hydraulic System

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 1. THREE POINT HYDRAULIC SYSTEM (1) Auxiliary Control Valve (4) Hydraulic Pump for Power (5) Hydraulic Pump for Three (6) PTO Control Valve (2) Hydraulic Cylinder Body Steering Point Hydraulic System...

  • Page 359: Hydraulic Circuit For Three Point Hydraulic System

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 2. HYDRAULIC CIRCUIT FOR THREE POINT HYDRAULIC SYSTEM [M6800(S)] (1) Oil Tank (Transmission Case) (5) Relief Valve (8) Hydraulic Cylinder A : To Implement Cylinder (2) Hydraulic Oil Filter Cartridge...
  • Page 360 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [M8200 · M9000] (1) Oil Tank (Transmission Case) (5) Control Valve (8) Cylinder Safety Valve A : To Implement Cylinder (2) Hydraulic Oil Filter Cartridge (6) Lowering Speed Adjusting (9) Auxiliary Control Valve...

  • Page 361: Hydraulic Pump

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 3. HYDRAULIC PUMP The three point system hydraulic pump pressure feds the oil drawn from the transmission case through the oil filter to the control valve. The three point system hydraulic pump is driven by the idle gear 2.
  • Page 362 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Pressure Loading System pressure loading system automatically decreases the clearance between the gear and the bushing (1). A small amount of pressure oil is fed behind the bushings, pressing them against the gears and forming a tighter seal against leakage.

  • Page 363: Oil Filter

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 4. OIL FILTER Two oil filter are located in parallel at the pump suction line. A permanent magnet, servicing as a magnet filter, is inserted in the paper type element of each cartridge, which ensures a filtration degree of β60...

  • Page 364: Position Control Valve

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 5. POSITION CONTROL VALVE [1] M6800(S) Neutral Oil forced into the control valve through the P port pushes open the unload valve (5) and then returns to the transmission case through the T port.
  • Page 365 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down When the control lever is moved to the “DOWN” position, the spool (4) is pulled out to the right, and the poppet valve (2) is also pulled out. Oil in the hydraulic cylinder is forced out to the...

  • Page 366: M8200 · M9000

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [2] M8200 · M9000 The control valve is composed as shown figure left. The spool (3) is moved by the operating the position control lever. The positions of the spool movement makes four kinds of circuit such as “Neutral”, “Lifting”,...
  • Page 367 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift When the control lever is moved to “UP”, spool (3) is pushed by the spool operating lever, forming a circuit with the P port and chamber A. The pressurized oil thus flows into the chamber A and closes unload poppet 1 (4).
  • Page 368 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down When the control lever is moved to Down, spool (3) moves to arrow-mark direction, and push the poppet 3 (2). It forms a circuit with the C port and T port.

  • Page 369: Relief Valve

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 6. RELIEF VALVE Relief Valve M6800(S), M8200 and M9000 use a pilot-operated relief valve. This relief valve is suitable for a high pressure and large volumetric flow, and has better pressure override performance than direct acting relief valves.

  • Page 370: Hydraulic Cylinder

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 7. HYDRAULIC CYLINDER (1) Lowering Speed Adjusting (4) O-ring (9) Hydraulic Arm Shaft (14) Spring Pin Knob (5) Hydraulic Piston (10) Setting Screw (15) Lift Arm (2) Lowering Speed Adjusting...

  • Page 371: Linkage Mechanism

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 8. LINKAGE MECHANISM [1] M6800(S) (1) Position Control Position control is a linkage mechanism to raise or lower the implement attached to the tractor in proportion to the movement of the position control lever.
  • Page 372 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down (1) Position Control Lever (2) Lever Shaft (3) Fulcrum 1 (4) Cam Link (5) Link (6) Spool Drive Lever (7) Spool (8) Fulcrum 2 1. When the position control lever (1) is moved to the “DOWN” position, the lever shaft (2) rotates and pull up the cam link (4) between the fulcrum 1 (3) and link (5).

  • Page 373: Draft Control

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (2) Draft Control Draft control is a system which maintain a constant traction load, and is suited for the work which needs heavy traction load such as plowing. The implement is automatically raised when its traction load is increased, and lowers when the traction load is decreased.
  • Page 374 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Draft Control Operation (1) Draft Control Lever (5) Top Link Holder (9) Spool Drive Lever (12) Spool (2) Lever Shaft (6) Torsion Bar (10) Link 1 (13) Fixed Arm (3) Feedback Shaft...
  • Page 375 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (3) Feedback Shaft (4) Feedback Rod (6) Torsion Bar (8) Link 2 (9) Spool Drive Lever (10) Link 1 (12) Spool W1016812 2. When the traction load increases, the torsion bar (6) is twisted, and its displacement is transmitted to the feedback shaft (3) via the feedback rod (4).

  • Page 376: M8200 · M9000

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [2] M8200 · M9000 (1) Position Control Position control is a system to raise and lower the implement proportionally to the movement of the position control lever. With this system, the implement can be raised or lowered to any position desired by changing the position of the control lever and fine adjustment is also easy.

  • Page 377: Draft Control

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (2) Draft Control Draft control is a system in which the lift arms (implement) automatically rise when the implement’s traction load is increased and lower when the traction load is decreased. By maintaining a constant traction load, it prevents the tractor from slipping and over-load.

  • Page 378: Mixed Control

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (3) Mixed Control Mixed control is a system combining position control with draft control. When traction load increases, the draft control functions to raise the lift arms (implement). When traction load reduces, the lift arms (implement) lower to...

  • Page 379: Cylinder Safety Valve (Surge Relief Valve)

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 9. CYLINDER SAFETY VALVE (SURGE RELIEF VALVE) The cylinder safety valve is located on the cylinder cover of the three point hydraulic system. These tractors use a direct acting relief valve, which is suitable for low volume and less frequent operations.

  • Page 380: Auxiliary Control Valve

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 10. AUXILIARY CONTROL VALVE If necessary, hydraulic power for implements can be taken out using auxiliary control valves and quick couplers. IMPORTANT • When taking out hydraulic power, replenish transmission oil in the quantity equal to the flow rate required for the implement cylinder.
  • Page 381 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift (Double Acting) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Selecting Valve A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary...
  • Page 382 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down (Double Acting) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Selecting Valve A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary...
  • Page 383 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift (Single Acting) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Selecting Valve A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary...
  • Page 384 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down (Single Acting) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Selecting Valve A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary...

  • Page 385: Self-Cancelling With Detent (Standard)

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [2] SELF-CANCELLING WITH DETENT (STANDARD) Neutral (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Plunger (5) Filter (6) Poppet (7) Detent Piston (8) Detent Ball A : A Port...
  • Page 386 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift-1 (When Spool is Held at “UP” Position by Detent) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port...
  • Page 387 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift-2 (When “UP” Position is Self-Cancelled) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port B : B Port...
  • Page 388 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down-1 (When Spool is Held at “Down” Position by Detent) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port...
  • Page 389 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down-2 (When “Down” Position is Self-Cancelled) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port B : B Port...

  • Page 390: Self-Cancelling With Detent (If Equipped)

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [3] SELF-CANCELLING WITH DETENT (IF EQUIPPED) Neutral (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Plunger (5) Filter (6) Poppet (7) Detent Piston (8) Detent Ball A : A Port...
  • Page 391 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift-1 (When Spool is Held at “UP” Position by Detent) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port...
  • Page 392 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift-2 (When “UP” Position is Self-Cancelled) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port B : B Port...
  • Page 393 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down-1 (When Spool is Held at “Down” Position by Detent) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port...
  • Page 394 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down-2 (When “Down” Position is Self-Cancelled) (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Poppet (5) Detent Piston (6) Detent Ball A : A Port B : B Port...

  • Page 395: Floating With Detent (If Equipped)

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [4] FLOATING WITH DETENT (IF EQUIPPED) Neutral (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Detent Ring (5) Detent Bushing (6) Detent Ball A : A Port...
  • Page 396 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift (1) Spool (2) Check Valve 1 (3) Check Valve 2 A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary Control Valve) Port (To Transmission...
  • Page 397 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Down (1) Spool (2) Check Valve 1 (3) Check Valve 2 A : A Port B : B Port Port (From Hydraulic Pump) Port (To Auxiliary Control Valve) Port (To Transmission...
  • Page 398 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Floating (1) Spool (2) Check Valve 1 (3) Check Valve 2 (4) Detent Ring (5) Detent Bushing (6) Detent Ball A : A Port B : B Port Port (From Hydraulic...

  • Page 399: Flow Control Valve (If Equipped)

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [5] FLOW CONTROL VALVE (IF EQUIPPED) Flow control valve is installed in hydraulic systems to control the quantity of fluid flowing to auxiliary control valves by needle valve. The needle valve may be used to regulate the speed of a hydraulic cylinder.
  • Page 400 SERVICING CONTENTS 1. TROUBLESHOOTING ..................8-S1 2. SERVICING SPECIFICATIONS ..............8-S2 3. TIGHTENING TORQUES ................8-S5 4. CHECKING, DISASSEMBLING AND SERVICING........8-S6 [1] HYDRAULIC PUMP .................8-S6 (1) Checking .....................8-S6 (2) Disassembling and Assembling ............8-S9 (3) Servicing ...................8-S11 [2] POSITION CONTROL AND DRAFT CONTROL LINKAGE....8-S13 (1) Checking and Adjusting ..............8-S13 [3] RELIEF VALVE ..................8-S19 (1) Checking and Adjusting ..............8-S19...

  • Page 401: Troubleshooting

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Implement Does Not • Control linkage improperly assembled or Repair or replace 8-S13 to Rises (Not Noise) damaged • Control valve malfunctioning (unload valve,...

  • Page 402: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 2. SERVICING SPECIFICATIONS HYDRAULIC PUMP [Individual Flow Type] Item Factory Specification Allowable Limit Hydraulic Pump Delivery Above Condition Pump 1 38.3 L/min. 31.9 L/min. • Engine Speed (Front Side for 10.1 U.S.gals./min.
  • Page 403 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM RELIEF VALVE [Individual Flow Type] Item Factory Specification Allowable Limit Relief Valve Setting Pressure 18.6 to 19.1 MPa – Condition 190 to 195 kgf/cm • Engine Speed 2702 to 2773 psi Maximum •...
  • Page 404 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM HYDRAULIC CYLINDER [M8200 · M9000] Item Factory Specification Allowable Limit Cylinder Bore I.D. 100.036 to 100.071 mm 100.15 mm 3.93843 to 3.93980 in. 3.94291 in. Hydraulic Arm Shaft to Bushing Clearance (Right) 0.140 to 0.250 mm...

  • Page 405: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 406: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 4. CHECKING, DISASSEMBLING AND SERVICING [1] HYDRAULIC PUMP (1) Checking Hydraulic Flow Test [Individual Flow Type] IMPORTANT • When using flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with the flowmeter.
  • Page 407 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Hydraulic Flow Test [Combined Flow Type] IMPORTANT • When using flowmeter other than KUBOTA specified flowmeter, be sure to use the instructions with the flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.
  • Page 408 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Hydraulic Flow Test [Combined Flow Type] (Continued) Condition −1 • Engine speed ..... Approx. 2600 min (rpm) • Rated pressure ..19.1 MPa 195 kgf/cm 2773 psi • Oil temperature ..50 to 60 °C 122 to 144 °F...

  • Page 409: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (2) Disassembling and Assembling IMPORTANT • The hydraulic pump is precision machined and assembled : if disassembled once, it may be unable to maintain its original performance. Therefore, when the hydraulic pump fails, replacement should be carried out with the hydraulic pump assembled except when emergency repair is unavoidable.
  • Page 410 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Disassembling Three Point System Hydraulic Pump [Individual Flow Type] 1. Remove the flange (3) and center plate (1). 2. Remove the backup element (4) and seal element (5). 3. Remove the bushings (6) and (9).

  • Page 411: Servicing

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Disassembling Tandem Pump [Combined Flow Type] 1. Put a parting mark (1), (2), (3), (4) on the flange (5), front flange (6), center plate (7), housing (8) and cover (9).
  • Page 412 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Clearance between Bushing and Gear Shaft 1. Measure the gear shaft O.D. with an outside micrometer. 2. Measure the bushing I.D. with an inside micrometer, and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace the gear shaft and the bushing as a unit.

  • Page 413: Position Control And Draft Control Linkage

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [2] POSITION CONTROL AND DRAFT CONTROL LINKAGE (1) Checking and Adjusting (A) M6800(S) Adjusting Uppermost Position of Lift Arm 1. Attach the weight (1) of 490 N (50 kgf, 110 lbs) to the end of lower link (2).
  • Page 414 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Checking Floating Position 1. Attach the weight of 490 N (50 kgf, 110 lbs) to the end of lower link. 2. Set the position control lever (1) and draft control lever (2) to the lowest position, and set the engine speed at the maximum.
  • Page 415 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Checking Floating Position 1. Attach the weight (1) of 490 N (50 kgf, 110 lbs) to the end of lower link (2). 2. Set the position control lever (5) and draft control lever (6) to the lowest position.
  • Page 416 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (B) M8200 · M9000 Adjusting the Uppermost Position of Lift Arm 1. Move the position and draft control levers all the way down. 2. Raise the lift arm (1) to the top dead center by hand, and mark...
  • Page 417 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Adjusting Position Control Lever 1. Attach a weight of approx. 490 N (50 kgf, 110 lbs) to the end of the lower links. −1 2. Start the engine and set the speed at 1000 min (rpm).
  • Page 418 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lifting Range Check 1. Attach the weight (3) of approx. 490 N (50 kgf, 110 lbs) to the end of the lower links. 2. Attach the test bar (1) (refer to “9. SPECIAL TOOL” at GENERAL Section) to the top link bracket (2).

  • Page 419: Relief Valve

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [3] RELIEF VALVE (1) Checking and Adjusting Relief Valve Setting Pressure Test Using Pressure Tester (Coupler) [M8200, M9000] 1. Set the Relief Valve Set Pressure Adaptor G (Code No. 07916- 52751) to the half male of the quick coupler and then set a pressure gauge (Code No.

  • Page 420: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Relief Valve Setting Pressure Test Using Pressure Tester (Coupler) [M6800(S)] 1. Set the Relief Valve Set Pressure Adaptor G (Code No. 07916- 52751) to the half male of the quick coupler and then set a pressure gauge (Code No.

  • Page 421: Hydraulic Cylinder And Position Control Valve

    M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM [4] HYDRAULIC CYLINDER AND POSITION CONTROL VALVE (1) Disassembling and Assembling (A) Separating Hydraulic Cylinder Assembly Rear Wheel and Fenders 1. Place disassembling stand under the transmission case. 2. Remove the three point linkage (4).
  • Page 422 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Hydraulic Cylinder Assembly 1. Disconnect the draft control rod from the top link bracket. 2. Remove the lift rods from lift arms. 3. Remove the hydraulic cylinder assembly mounting screws and nuts.
  • Page 423 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Recording Distance between Plate and Lock Nut NOTE • Before disassembling spool, be sure to record the lock nut position. 1. Press the plate (2) on to the valve body, and measure the distance between the plate (2) and lock nut (1) for poppet valve.
  • Page 424 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Check Valve 1. Remove the seat plug (1). 2. Draw out the spring (3) and check valve (2). (When reassembling) • Install the plug, noting O-ring. • After tightening the seat plug, stake it with a punch.
  • Page 425 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Plug and Unload Valve 1. Secure the control valve with a vise. 2. Remove the seat plug 1 (1) for unload poppet 1 (3). 3. Draw out the spring (2) for unload poppet 1 (3).
  • Page 426 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Position and Draft Linkage (Reference) • Serial No. information Type A Type B M8200 2WD Below 10806 Above 10807 M8200 4WD Below 53210 Above 53211 M9000 2WD Below 10938 Above 10939...
  • Page 427 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (D) Disassembling Cylinder Safety Valve Cylinder Safety Valve 1. Remove the cylinder safety valve assembly (7). 2. Secure the cylinder safety valve assembly in a vise. 3. Loosen the lock nut (2), and remove the adjust screw (1).
  • Page 428 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (E) Disassembling Hydraulic Cylinder Assembly [M6800(S)] Hydraulic Cylinder Cover and Hydraulic Piston 1. Remove the hydraulic cylinder cover (1). 2. Push out the hydraulic piston (5) from the hydraulic cylinder.
  • Page 429 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Hydraulic Arm and Hydraulic Rod 1. Remove the spring pin (2), and separate the hydraulic arm (3) and the hydraulic rod (1). (When reassembling) • Apply grease to the joints of the hydraulic arm, hydraulic rod, set pin and piston.
  • Page 430 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Lift Arm and Hydraulic Arm Shaft 1. Remove the wire and unscrew the setting screw (3). 2. Remove the external snap ring (5) and lift arm L.H. (1). 3. Draw out the hydraulic arm shaft (2) and lift arm R.H. (4) as a unit.
  • Page 431 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM (2) Servicing (A) Cylinder Safety Valve Operating Pressure of Cylinder Safety Valve 1. Attach the cylinder safety valve to an injection nozzle tester with a safety valve setting adaptor. (Refer to “9. SPECIAL TOOLS”...
  • Page 432 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM 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.
  • Page 433 M6800 · M6800S · M8200 · M9000, WSM HYDRAULIC SYSTEM Clearance between Hydraulic Arm Shaft and Bushing (Continued) (When reassembling) • When press-fitting a new bushing with a press-fitting tool (Refer to “9. SPECIAL TOOLS” at GENERAL Section), observe the dimensions described in the figure.

  • Page 434: Electrical System

    ELECTRICAL SYSTEM KiSC issued 03, 2008 A...
  • Page 435 MECHANISM CONTENTS 1. WIRING DIAGRAM ..................9-M1 2. STARTING SYSTEM .................. 9-M14 [1] STARTER MOTOR ................9-M15 [2] GLOW CONTROL SYSTEM..............9-M15 3. ENGINE KEY SWITCH SHUT-OFF SYSTEM ......... 9-M16 4. CHARGING SYSTEM ................. 9-M18 [1] IC REGULATOR ................... 9-M19 5.

  • Page 436: Wiring Diagram

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 1. WIRING DIAGRAM Color of Wiring B ... Black B/Y ..Black / Yellow Or/W ..Orange / White G ..Green Br/B ..Brown / Black R/B .... Red / Black L ...
  • Page 437 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For North America (Old Type) 9-M2 KiSC issued 03, 2008 A...
  • Page 438 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M3 KiSC issued 03, 2008 A...
  • Page 439 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For North America (New Type) 9-M4 KiSC issued 03, 2008 A...
  • Page 440 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M5 KiSC issued 03, 2008 A...
  • Page 441 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For North America (with OPC) 9-M6 KiSC issued 03, 2008 A...
  • Page 442 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M7 KiSC issued 03, 2008 A...
  • Page 443 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For Oceania 9-M8 KiSC issued 03, 2008 A...
  • Page 444 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M9 KiSC issued 03, 2008 A...
  • Page 445 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For Euro 9-M10 KiSC issued 03, 2008 A...
  • Page 446 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M11 KiSC issued 03, 2008 A...
  • Page 447 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM For Asia and other country 9-M12 KiSC issued 03, 2008 A...
  • Page 448 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 9-M13 KiSC issued 03, 2008 A...

  • Page 449: Starting System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 2. STARTING SYSTEM (1) Battery (6) Starter Relay (10) Glow Plug (14) Relay 1 (2) Slow Blow Fuse (7) Starter Motor (11) PTO Relay (15) Timer Relay (3) Fuse (20 A)

  • Page 450: Starter Motor

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [1] STARTER MOTOR Starter Relay The starter relay (7) is mounting on this starter (5) to prevent the contact of the main switch (1) burning out when the main switch is switched.

  • Page 451: Engine Key Switch Shut-Off System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 3. ENGINE KEY SWITCH SHUT-OFF SYSTEM The fuel cut-off solenoid is located at the top of the injection pump (3). When the main switch is turned to START position, the push rod (2) is pulled to top side by solenoid (1) for control rack (4) to starting position.
  • Page 452 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (1) Main Switch (3) PTO Switch (5) Key Stop Relay (6) Timer Relay (2) Safety Switch (4) Fuel Cut-off Solenoid “START” Position When the main switch (1) is turned to START position, the current of the starter motors S terminal goes to PULL terminal of fuel cut-off solenoid (4) through the key stop relay (5).

  • Page 453: Charging System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 4. CHARGING SYSTEM (1) Main Switch (4) Battery (7) PTO Lamp (10) Fuel Limit Lamp (2) Fuse (20 A) (5) Alternator (8) Engine Oil Pressure Lamp (11) Fuel Limit Sensor...

  • Page 454: Ic Regulator

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [1] IC REGULATOR (1) Alternator (4) Trio Diode (6) IC Regulator (8) Main Switch (2) Stator Coil (5) Power Transistor (7) Charge Lamp (9) Battery (3) Field Coil 1. When the main switch (8) is turned on, the base current of the power transistor starts flowing.

  • Page 455: Lighting System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 5. LIGHTING SYSTEM [1] DESTINATION (1) For North America and Oceania (1) Battery (6) Indication Lamp (11) Head Light (Hi) (16) Hazard Unit (2) Slow Blow Fuse (7) Fuse (20 A)

  • Page 456: For North America

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (2) For North America NOTE • Serial No. affected are as below. Model M6800(S) Above 10794 Above 50958 M8200 Above 10413 Above 50785 M9000 Above 10374 Above 50840 (1) Battery...

  • Page 457: For Euro

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (3) For Euro (1) Battery (8) Brake Switch (15) Diode (24) Turn Signal Light Switch (2) Slow-Blow Fuse (9) Stop and Tail Light (L.H.) (16) Fuse (10 A) (25) Horn Switch (3) Main Switch (10) Stop and Tail Light (R.H.)
  • Page 458 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Hazard Unit (for North America) The hazard unit, consisting of a capacitor, transistors, diodes, resistors and the other parts, sends intermittent current to the hazard lights. Intermittent current is generated in the following sequence.
  • Page 459 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Hazard Switch (for North America, Oceania and Euro) NOTE • Serial No. affected of North America models are as below. Model M6800(S) Above 10794 Above 50958 M8200 Above 10413 Above 50785...

  • Page 460: Easy Checker

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 6. EASY CHECKER [1] DESTINATION (1) For North America, Oceania, Asia and Other Country (1) Main Switch (4) Battery (7) PTO Lamp (10) Fuel Limit Lamp (2) Fuse (20 A)

  • Page 461: For Euro

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (2) For Euro (1) Main Switch (4) Battery (7) PTO Lamp (10) Air Cleaner CLogged Lamp (2) Fuse (20 A) (5) Alternator (8) Engine Oil Pressure Lamp (11) Engine Oil Pressure Switch...

  • Page 462: Air Cleaner Clogged Lamp

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [3] AIR CLEANER CLOGGED LAMP (FOR EURO AND OCEANIA MODEL ONLY) When the air cleaner is clogged and the negative pressure of the suction air increases, the air cleaner sensor (1) is turned ON, causing the current to flow from the main switch and the lamp (2) is lighted.
  • Page 463 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [5] INSUFFICIENT FUEL Insufficient fuel is detected by the fuel limit sensor (thermistor) installed in the fuel tank. (1) Fuel Unit W1016421 Fuel Limit Sensor (Thermistor) Thermistor is a kind of resistor whose resistance varies with the temperature.
  • Page 464 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 7. GAUGES The fuel quantity and coolant temperature are indicated by the ammeters. The ammeters indicate each amperate flowing through the fuel level sensor (3) for the fuel quantity detection and through the coolant temperature sensor (4) for the coolant temperature detection.
  • Page 465 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [2] GAUGE Both the fuel gauge and coolant temperature gauge use bimetal types. When the main switch (2) is turned ON, the current controlled by the resistance of the sensor (7) flows through the circuit and is grounded.
  • Page 466 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 8. OPC (OPERATOR PRESENCE CONTROL) EQUIPPED) [1] SYSTEM OUTLINE AND ELECTRICAL CIRCUIT (1) Seat Switch (2) OPC Buzzer Timer (3) PTO Switch (4) Buzzer (5) Main Switch (6) PTO Relay...
  • Page 467 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM OPC Buzzer Timer After the current supply cuts from seat switch, the OPC buzzer timer (1) adopted for this system has maintained the state of ON position for whistling the buzzer about 10 seconds.
  • Page 468 SERVICING CONTENTS 1. TROUBLESHOOTING ..................9-S1 2. SERVICING SPECIFICATIONS ..............9-S5 3. TIGHTENING TORQUES ................9-S6 4. CHECKING, DISASSEMBLING AND SERVICING........9-S7 [1] BATTERY....................9-S7 (1) Checking .....................9-S7 (2) Servicing .....................9-S9 [2] STARTING SYSTEM ................9-S10 (1) Checking ...................9-S10 (2) Disassembling and Assembling ............9-S15 (3) Servicing ...................9-S16 [3] CHARGING SYSTEM ................9-S18 (1) Checking ...................9-S18 (2) Disassembling and Assembling ............9-S19...
  • Page 469 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page All Electrical • Battery discharged or defective Recharge or replace 9-S7 to S9 Equipments Do Not • Battery positive cable disconnected or...
  • Page 470 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM LIGHTING SYSTEM Reference Symptom Probable Cause Solution Page Head Light Does Not • Fuse blown (15 A) Replace – Light • Bulb blown Replace – • Wiring harness disconnected or improperly Repair or replace –...
  • Page 471 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM HORN (For Euro and Oceania Model) Reference Symptom Probable Cause Solution Page Horn Does Not • Horn switch defective Replace – Sound When Horn • Horn defective Replace 9-S22 Button Is Pushes •...
  • Page 472 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM GAUGES Reference Symptom Probable Cause Solution Page Fuel Gauge Does Not • Fuel gauge defective Replace 9-S32 Function • Fuel level sensor (tank unit) defective Replace 9-S32 • Wiring harness disconnected or improperly Repair or replace –...

  • Page 473: Servicing Specifications

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 2. SERVICING SPECIFICATIONS STARTER MOTOR Item Factory Specification Allowable Limit Commutator O.D. 32.0 mm 31.4 mm 1.2598 in. 1.2362 in. Mica Undercut 0.50 to 0.80 mm 0.2 mm 0.0197 to 0.0315 in.

  • Page 474: Tightening Torques

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 475: Checking, Disassembling And Servicing

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 4. CHECKING, DISASSEMBLING AND SERVICING CAUTION • To avoid accidental short circuit, be sure to attach the positive cable to the positive terminal before the ground cable is attached to the negative terminal.
  • Page 476 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Battery Specific Gravity 1. Check the specific gravity of the electrolyte in each cell with a hydrometer. 2. When the electrolyte temperature differs from that at which the hydrometer was calibrated, correct the specific gravity reading following the formula mentioned in (Reference).

  • Page 477: Servicing

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (2) Servicing 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 478: Starting System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Directions for Storage 1. When shutting down the tractor for long periods of time, remove the battery from the tractor, adjust the electrolyte to the proper level, and after fully charging, store the battery in a well ventilated placed where it is not exposed to direct sunlight.
  • Page 479 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Main Switch at PREHEAT Position 1. Turn and hold the main switch at the PREHEAT position. 2. Measure the resistances with an ohmmeter across the B terminal and the G1 terminal and across B terminal and M terminal.
  • Page 480 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Starter Relay 1. Remove the starter relay (1). 2. Apply battery voltage across terminals 3 and 4, and check for continuity across terminals 1 and 2. 3. If continuity is not established across terminals 1 and 2, renew the starter relay.
  • Page 481 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Glow Plug 1. Disconnect the leads from the glow plugs. 2. Measure the resistance with an ohmmeter between the glow plug terminal and the chassis. 3. If 0 ohm is indicated, the screw at the tip of the glow plug and the housing are short-circuited.
  • Page 482 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 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 483: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (2) Disassembling and Assembling Disassembling Motor 1. Disconnect the solenoid switch (3). 2. Remove the 2 through screws (9) and the 2 brush holder lock screws. Take out the rear end frame (13) and the brush holder (12).

  • Page 484: Servicing

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (3) Servicing 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 485 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Armature Coil 1. Check the continuity across the commutator and armature coil core with an ohmmeter. 2. If it conducts, replace the armature. 3. Check the continuity across the segments of the commutator with an ohmmeter.

  • Page 486: Charging System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Field Coil 1. Check the continuity across the lead (1) and brush (2) with an ohmmeter. 2. If it does not conduct, replace the yoke assembly. 3. Check the continuity across the brush (2) and yoke (3) with an ohmmeter.

  • Page 487: Disassembling And Assembling

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM No-Load Test 1. Connect the 2P connector (6) to previous positions of the alternator after turning the main switch OFF. 2. Connect the jumper lead (3) between IG terminal (4) and B terminal (2).
  • Page 488 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Brush 1. When the rotor is detached, the 2 brushes are found to stretch out of the shaft hole. W1018748 Reassembling the Brush 1. Fit the brush with its sliding face in the clockwise direction when viewed from front.

  • Page 489: Servicing

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM (3) Servicing Bearing 1. Check the bearing for smooth rotation. 2. If it does not rotate smoothly, replace it. W1019790 Stator 1. Measure the resistance across each lead of the stator coil with an ohmmeter.

  • Page 490: Lighting System

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Rectifier 1. Check the continuity across each diode of rectifier with an ohmmeter. 2. The rectifier is normal if the diode in the rectifier conducts in one direction and does not conduct in the reverse direction.
  • Page 491 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 2) Light Switch Continuity when Setting Switch at OFF Position 1. Disconnect the combination switch connector. 2. Set the light switch to the OFF position. 3. Measure the resistance with an ohmmeter across the B...
  • Page 492 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 7) Turn Signal Light Switch 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 B terminal to the L terminal.
  • Page 493 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Hazard Unit (for North America and Oceania) 1. Disconnect the connector from the hazard unit. 2. Measure the voltage with a voltmeter across the terminal h and chassis. 3. If the voltage differ from the battery voltage, the wiring harness is faulty.
  • Page 494 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Hazard Unit Test (for Euro) 1. Remove the hazard unit from the tractor. 2. Connect jumper leads from the L terminal to the bulb (3), and from the bulb to the battery negative terminal.
  • Page 495 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 3) Head Light Switch Continuity when Setting Switch Knob at LOW-BEAM Position 1. Measure the resistance with an ohmmeter across the B terminal and the C terminal and the B terminal and the L terminal.
  • Page 496 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM 3) Hazard Switch at ON Position 1. Set the hazard switch knob to the hazard ON position. 2. Check the continuities with an ohmmeter across the terminals 1 and 2, terminals 2 and 3, terminals 1 and 3 with the switch knob...
  • Page 497 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Hazard Unit Test 1. Remove the hazard unit from the tractor. 2. Connect jumper leads from the L terminal to the bulb, and from the bulb to the battery negative terminal.

  • Page 498: Warning Lamps

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [5] WARNING LAMPS (1) Checking Engine Oil Pressure Switch Panel Board and Wiring Harness 1. Disconnect the lead from the engine oil pressure switch after turning the main switch OFF.
  • Page 499 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Air Cleaner Sensor Panel Board and Wiring Harness (for Oceania and Euro) 1. Disconnect the leads from the air cleaner sensor (1) after turning the main switch OFF. 2. Turn the main switch ON and connect a jumper lead between the leads.

  • Page 500: Gauges

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [6] GAUGES (1) Checking Fuel Level Sensor Continuity 1. Remove the fuel level sensor from the fuel tank. 2. Measure the resistance with an ohmmeter across the sensor terminal and its body.

  • Page 501: Opc (If Equipped)

    M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM [7] OPC (IF EQUIPPED) OPC Buzzer Timer 1. Remove the buzzer timer (1). (Testing connections as shown in figure.) 2. Connect the jumper lead across the battery positive terminal and 4 terminal.
  • Page 502 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Seat Switch 1. Disconnect the seat switch 2P connector (2) from the wire harness. 2. Check the continuity with an ohmmeter across the switch terminals. 3. If it does not conduct or any value is indicated when the switch is pushed (ON seat), the switch is faulty.
  • Page 503 M6800 · M6800S · M8200 · M9000, WSM ELECTRICAL SYSTEM Buzzer 1. Remove the buzzer (1). 2. Connect the jumper lead across the battery positive terminal and 1 terminal of connector. 3. Connect the jumper lead across the battery negative terminal and 2 terminal of connector.
  • Page 504 CABIN KiSC issued 03, 2008 A...
  • Page 505 SAFETY INSTRUCTIONS M6800 · M6800S · M8200 · M9000, WSM 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 numer is listed in the parts list.
  • Page 506 SAFETY INSTRUCTIONS M6800 · M6800S · M8200 · M9000, WSM 10-2 KiSC issued 03, 2008 A...
  • Page 507 SPECIFICATIONS M6800 · M6800S · M8200 · M9000, WSM SPECIFICATIONS M6800SQ Model Model V3300-E / V3300-E2 Type Vertical, water-cooled, 4-cycle diesel engine Number of cylinders Total displacement 3318 cm (202.5 cu.in.) 98 × 110 mm (3.9 × 4.3 in.) Bore and stroke Net power 50.8 kW (68 HP)*...
  • Page 508 SPECIFICATIONS M6800 · M6800S · M8200 · M9000, WSM M8200Q M9000Q Model Model V3300-TE / V3300-TE2 V3300-TIE / V3300-TIE2 Type Vertical, water-cooled, 4-cycle diesel engine Number of cylinders Total displacement 3318 cm (202.5 cu.in.) 98 × 110 mm (3.9 × 4.3 in.)
  • Page 509 SPECIFICATIONS M6800 · M6800S · M8200 · M9000, WSM (Continued) M8200Q M9000Q Model Destination North America 3875 mm (152.6 in.) 3805 mm (149.8 in.) 3875 mm (152.6 in.) 3845 mm (151.4 in.) Overall length** Oceania – 3805 mm (149.8 in.) –...
  • Page 510 DIMENSIONS M6800 · M6800S · M8200 · M9000, WSM DIMENSIONS 10-6 KiSC issued 03, 2008 A...
  • Page 511 DIMENSIONS M6800 · M6800S · M8200 · M9000, WSM Destination North America Oceania Euro Model M8200Q M9000Q M8200Q M9000Q M8200Q M9000Q 2530 mm 2480 mm 2530 mm 2555 mm 2480 mm 2530 mm Overall height (A) (97.6 in.) (99.6 in.) (100.6 in.)
  • Page 512 GENERAL CONTENTS 1. LUBRICANTS FUEL AND COOLANT ............10-G1 2. MAINTENANCE CHECK LIST ..............10-G2 3. CHECK AND MAINTENANCE ..............10-G3 [1] DAILY CHECK ..................10-G3 [2] CHECK POINTS OF EVERY 50 HOURS ......... 10-G4 [3] CHECK POINTS OF EVERY 200 HOURS ........10-G5 [4] CHECK POINTS OF EVERY 1 YEAR ..........

  • Page 513: Lubricants Fuel And Coolant

    CABIN M6800 · M6800S · M8200 · M9000, WSM 1. LUBRICANTS FUEL AND COOLANT Capacity Place Lubricants, fuel and coolant M6800SQ M8200Q M9000Q 95 L 110 L No. 2-D diesel fuel Fuel 25.1 U.S.gals. 29.1 U.S.gals. No. 1-D diesel fuel if temperature is below −10 °C (14 °F)

  • Page 514: Maintenance Check List

    CABIN M6800 · M6800S · M8200 · M9000, WSM 2. MAINTENANCE CHECK LIST Period After Service Interval purchase Reference Important page 100 200 300 400 600 800 1500 3000 Item year years Inner air filter Clean 10-G5 Fresh air filter...

  • Page 515: Check And Maintenance

    CABIN M6800 · M6800S · M8200 · M9000, WSM 3. 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. [1] DAILY CHECK Cleaning Air Conditioner Condenser Screen 1.

  • Page 516: Check Points Of Every 50 Hours

    CABIN M6800 · M6800S · M8200 · M9000, WSM [2] CHECK POINTS OF EVERY 50 HOURS Checking Engine Start System [M6800S · M8200 · M9000] CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.

  • Page 517: Check Points Of Every 200 Hours

    CABIN M6800 · M6800S · M8200 · M9000, WSM [3] CHECK POINTS OF EVERY 200 HOURS Cleaning Inner Air Filter 1. Remove the inner air filter (1), and blow air from the direction opposite to the filter’s normal flow. (1) Inner Air Filter...

  • Page 518: Check Points Of Every 1 Year

    CABIN M6800 · M6800S · M8200 · M9000, WSM [4] CHECK POINTS OF EVERY 1 YEAR Checking Air Conditioner Pipe and Clamp 1. Check to see that all lines and hose clamps are tight and not damaged. 2. If hoses and clamps are found worn or damaged, replace or repair them at once.
  • Page 519 CABIN M6800 · M6800S · M8200 · M9000, WSM Replacing Fuse NOTE • Affected serial number as below. M6800SQ : Below 20868 M6800SDTQ : Below 62880 M8200Q : Below 10798 M8200DTQ : Below 53142 M9000Q : Below 10915 M9000DTQ : Below 54966 1.
  • Page 520 CABIN M6800 · M6800S · M8200 · M9000, WSM Replacing Fuse (Continued) NOTE • Affected serial number as below. M6800SQ : Above 20869 M6800SDTQ : Above 62881 M8200Q : Above 10799 M8200DTQ : Above 53143 M9000Q : Above 10916 M9000DTQ : Above 54967 1.
  • Page 521 CABIN M6800 · M6800S · M8200 · M9000, WSM Replacing Fuse (Continued) (with OPC System) 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system.
  • Page 522 CABIN M6800 · M6800S · M8200 · M9000, 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.

  • Page 523: Special Tools

    CABIN M6800 · M6800S · M8200 · M9000, WSM 4. SPECIAL TOOLS NOTE • Special tools for R134a refrigerant air conditioning system introduced below are available from DENSO CO. LTD. Air Conditioner Service Tool Code No: DENSO CO. 95048-00061 Application: Use for charging, testing or discharging the air conditioning system.
  • Page 524 CABIN M6800 · M6800S · M8200 · M9000, WSM Adaptor (For R134a) Code No: DENSO CO. 95048-10190 (AC220V) 95048-10200 (AC240V) Application: Use for evacuating the air conditioning system. W1013888 Stopper Magnet Clutch (For A/C Compressor) Application: Use for loosen and tighten the magnet clutch mounting nut.
  • Page 525 CABIN M6800 · M6800S · M8200 · M9000, WSM Stopper Bolt (for A/C Compressor) Application: Use with the stopper magnet clutch. NOTE • This special tool is not provided, so make it referring to the figure. 12 mm (0.47 in.) 5.5 mm dia.
  • Page 526 MECHANISM CONTENTS 1. WIRING DIAGRAM ..................10-M1 2. LIGHTING SYSTEM ................. 10-M30 3. AIR CONDITIONER SYSTEM ..............10-M33 [1] PRINCIPLES OF AIR CONDITIONER..........10-M33 (1) Expansion and Evaporation ............10-M33 (2) How to Condense Gaseous Refrigerant into Liquid ....... 10-M34 (3) Condensing Gaseous ..............
  • Page 527 CABIN M6800 · M6800S · M8200 · M9000, WSM 1. WIRING DIAGRAM Color of Wiring B ... Black B/Y ..Black / Yellow Or/W ..Orange / White G ..Green Br/B ..Brown / Black R/B .... Red / Black L ...
  • Page 528 CABIN M6800 · M6800S · M8200 · M9000, WSM For U.S.A. and Oceania (Body) Type 1 10-M2 KiSC issued 03, 2008 A...
  • Page 529 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M3 KiSC issued 03, 2008 A...
  • Page 530 CABIN M6800 · M6800S · M8200 · M9000, WSM For U.S.A. and Oceania (Cabin) Type 1 10-M4 KiSC issued 03, 2008 A...
  • Page 531 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M5 KiSC issued 03, 2008 A...
  • Page 532 CABIN M6800 · M6800S · M8200 · M9000, WSM For U.S.A. and Oceania (Body) Type 2 10-M6 KiSC issued 03, 2008 A...
  • Page 533 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M7 KiSC issued 03, 2008 A...
  • Page 534 CABIN M6800 · M6800S · M8200 · M9000, WSM For U.S.A. and Oceania (Body) Type 2 (with OPC) 10-M8 KiSC issued 03, 2008 A...
  • Page 535 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M9 KiSC issued 03, 2008 A...
  • Page 536 CABIN M6800 · M6800S · M8200 · M9000, WSM For U.S.A. and Oceania (Cabin) Type 2 10-M10 KiSC issued 03, 2008 A...
  • Page 537 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M11 KiSC issued 03, 2008 A...
  • Page 538 CABIN M6800 · M6800S · M8200 · M9000, WSM For Canada (Body) Type 1 10-M12 KiSC issued 03, 2008 A...
  • Page 539 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M13 KiSC issued 03, 2008 A...
  • Page 540 CABIN M6800 · M6800S · M8200 · M9000, WSM For Canada (Cabin) Type 1 10-M14 KiSC issued 03, 2008 A...
  • Page 541 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M15 KiSC issued 03, 2008 A...
  • Page 542 CABIN M6800 · M6800S · M8200 · M9000, WSM For Canada (Body) Type 2 10-M16 KiSC issued 03, 2008 A...
  • Page 543 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M17 KiSC issued 03, 2008 A...
  • Page 544 CABIN M6800 · M6800S · M8200 · M9000, WSM For Canada (Body) Type 2 (with OPC) 10-M18 KiSC issued 03, 2008 A...
  • Page 545 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M19 KiSC issued 03, 2008 A...
  • Page 546 CABIN M6800 · M6800S · M8200 · M9000, WSM For Canada (Cabin) Type 2 10-M20 KiSC issued 03, 2008 A...
  • Page 547 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M21 KiSC issued 03, 2008 A...
  • Page 548 CABIN M6800 · M6800S · M8200 · M9000, WSM For Euro (Body) Type 1 10-M22 KiSC issued 03, 2008 A...
  • Page 549 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M23 KiSC issued 03, 2008 A...
  • Page 550 CABIN M6800 · M6800S · M8200 · M9000, WSM For Euro (Cabin) Type 1 10-M24 KiSC issued 03, 2008 A...
  • Page 551 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M25 KiSC issued 03, 2008 A...
  • Page 552 CABIN M6800 · M6800S · M8200 · M9000, WSM For Euro (Body) Type 2 10-M26 KiSC issued 03, 2008 A...
  • Page 553 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M27 KiSC issued 03, 2008 A...
  • Page 554 CABIN M6800 · M6800S · M8200 · M9000, WSM For Euro (Cabin) Type 2 10-M28 KiSC issued 03, 2008 A...
  • Page 555 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-M29 KiSC issued 03, 2008 A...
  • Page 556 CABIN M6800 · M6800S · M8200 · M9000, WSM 2. LIGHTING SYSTEM For North America and Oceania (1) Main Switch (8) Light Switch (13) Head Lights (HIGH-beam) (20) Working Light Switch (Front) (2) Slow Blow Fuse (9) Turn Signal Light Switch...
  • Page 557 CABIN M6800 · M6800S · M8200 · M9000, WSM For Euro (1) Main Switch (8) Hazard Relay (16) Front Combination Lamp (22) Head Lights (LOW-beam) (2) Slow Blow Fuse (9) Diodes (R.H.) (23) Brake Switch (3) Battery (10) Flasher Relay...
  • Page 558 CABIN M6800 · M6800S · M8200 · M9000, WSM Hazard Light Circuit (1) Battery (5) Fuse (15 A) (11) Front Combination Lamp (14) Rear Combination Lamp (2) Slow Blow Fuse (30 A) (6) Hazard Switch (L.H.) (R.H.) (3) Hazard and Turn Signal...
  • Page 559 CABIN M6800 · M6800S · M8200 · M9000, WSM 3. AIR CONDITIONER SYSTEM The air conditioner system operates using R134a refrigerant. NOTE • There are three types (Type 1, Type 2 and Type 3) of air conditioner system that is devided by serial number as below.
  • Page 560 CABIN M6800 · M6800S · M8200 · M9000, WSM (2) How to Condense Gaseous Refrigerant into Liquid The mechanical refrigerant system changes the refrigerant from the gaseous state to the liquid state while it is passing through the evaporator. When gas is compressed, both temperature and pressure increase.
  • Page 561 CABIN M6800 · M6800S · M8200 · M9000, WSM (4) Refrigeration Cycle 1. The compressor (1) discharges high temperature and high pressure refrigerant that contains the heat absorbed from the evaporator (4) plus the heat created by the compressor in a discharge stroke.
  • Page 562 CABIN M6800 · M6800S · M8200 · M9000, WSM [2] OUTLINE OF AIR CONDITIONING SYSTEM The machine is equipped with a thin large-capacity air conditioner with outside air intake. Through the inside air filter (9) as well as the outside air filter (4), the roof (8) and reaches the air conditioner unit (1).
  • Page 563 CABIN M6800 · M6800S · M8200 · M9000, WSM [3] REFRIGERATION SYSTEM (1) Heat Sensitizing Tube (7) Condenser (a) Cold Air (e) High Pressure, High (2) Expansion Valve (8) Receiver (b) Low Pressure, Low Temperature Gas (3) Evaporator (9) Desiccant...
  • Page 564 CABIN M6800 · M6800S · M8200 · M9000, WSM (1) Compressor The compressor is installed to on the engine and is driven by crank pulley through a belt. The compressor is a pump designed to raise the pressure of refrigerant. Raising the pressure means raising the temperature.
  • Page 565 CABIN M6800 · M6800S · M8200 · M9000, WSM When the pressure inside piston becomes negative as the piston is lowered, the low pressure gas flows through the suction hole of the valve plate (7) to force down the suction valve (3), thereby sending refrigerant into each cylinder.
  • Page 566 CABIN M6800 · M6800S · M8200 · M9000, WSM (B) Scroll Type Compressor (Type 2 and Type 3) The scroll type compressor is composed of a pair of swirl shaped fixed scroll (3) and movable scroll (2). The fixed scroll (3) combines with housing, and movable scroll (2) rotates with the shaft (8).
  • Page 567 CABIN M6800 · M6800S · M8200 · M9000, WSM (C) Pressure Relief Valve If the high pressure is abnormally high, the pressure relief valve open, and the refrigerant is released into the atmosphere, and the system is maintained. At the time, all of the refrigerant in the system is released into the atmosphere.
  • Page 568 CABIN M6800 · M6800S · M8200 · M9000, WSM (2) Condenser The condenser (1) is installed to the front of radiator (2) to enable forcible cooling by the air drawn in by the engine radiator fan. The condenser is used for the purpose of cooling and...
  • Page 569 CABIN M6800 · M6800S · M8200 · M9000, WSM (3) Receiver The receiver (3) serves the purpose of storing the liquid refrigerant. The amount of the liquid refrigerant flowing through the system varies with the operating condition of the air conditioner. To be accurate, the receiver stores excess amount of refrigerant when the heat load is lowered.
  • Page 570 CABIN M6800 · M6800S · M8200 · M9000, WSM Expansion Valve The expansion valve restricts the flow of liquid refrigerant as it passes through the expansion valve and delivers sprayed refrigerant to the evaporator for facilitating refrigerant evaporation. The cabin interior will not be cooled sufficiently if the expansion valve outlet is too small.
  • Page 571 CABIN M6800 · M6800S · M8200 · M9000, WSM Evaporator The purpose of evaporator (2) is just opposite to that of the condenser. The state of refrigerant immediately after the expansion valve (4) is 100 % liquid. As soon as the liquid pressure drops, it starts to boil, and in doing so, absorbs heat.
  • Page 572 CABIN M6800 · M6800S · M8200 · M9000, WSM A/C Blower The blower is incorporated in the right-hand space of the air conditioner unit. It blows cool, warm of fresh air via the front and side blow ports into the cabin.
  • Page 573 CABIN M6800 · M6800S · M8200 · M9000, WSM Refrigerant Properties Water boils at 100 °C (212 °F) under atmospheric pressure, but R134a boils at −26.5 °C (−15.7 °F) and its freezing points is −101 °C (−149.8 °F) below zero under atmospheric pressure.
  • Page 574 CABIN M6800 · M6800S · M8200 · M9000, WSM [4] SYSTEM CONTROL (1) Air Mode Lever (7) Recirculated Air (12) Air Outlet Door D3 (A) Control Plate (2) Blow Switch (8) Blower (Mode Door) (B) Air Selection Lever (3) Air Conditioner Switch...
  • Page 575 CABIN M6800 · M6800S · M8200 · M9000, WSM [5] ELECTRICAL SYSTEM (1) Electrical Circuit (A) Type 1 (Swash Plate Type Compressor) (1) Battery (2) Slow Blow Fuse (3) Main Switch (4) A/C Switch (Air Conditioner) (5) Compressor Relay (6) Thermo Switch...
  • Page 576 CABIN M6800 · M6800S · M8200 · M9000, WSM (B) Type 2 and Type 3 (Scroll Type Compressor) (1) Battery (2) Slow Blow Fuse (3) Main Switch (4) A/C Switch (Air Conditioner) (5) Compressor Relay (6) Thermo Switch (7) A/C Pressure Switch...
  • Page 577 CABIN M6800 · M6800S · M8200 · M9000, WSM (2) Air Conditioner Main Relay and Compressor Relay Remove the outer roof and the relays are visible at the ceiling center of the cabin : A/C main relay (7) and compressor relay (5). The blower fan is adjusted for the air flow rate by a signal from the fan switch on the control panel.
  • Page 578 CABIN M6800 · M6800S · M8200 · M9000, WSM (3) Blower Switch The wind of blower can be changed in 3 positions (Low, Medium and High) by changing the blower switch (6) position. Blower Switch is “OFF” Position When the blower switch (6) is in OFF position, even if the main switch (3) is turned to ON position, the A/C blower relay (4) does not operate.
  • Page 579 CABIN M6800 · M6800S · M8200 · M9000, WSM When Blower Switch is in · (Low), • (Medium) or (High) Position When the main switch (2) and blower switch (6) is turned ON, the current flows from battery (1) to A/C main relay’s coil and A/C main relay (4) is turned ON.
  • Page 580 CABIN M6800 · M6800S · M8200 · M9000, WSM (4) Pressure Switch The pressure switch detects the pressure in the refrigerant cycle, and when something is wrong, turns off the magnetic clutch to prevent the component from troubling. This system has dual type pressure switch (2), and this switch controls low pressure cut and high pressure cut.
  • Page 581 CABIN M6800 · M6800S · M8200 · M9000, WSM OFF Position (A : When the Refrigerant Pressure is Low) The pressure switch detects the pressure drop when refrigerant leaks from system causing compressor seizure. When pressure of refrigerant is less than specified pressure, the switch is turned OFF and disengages magnetic clutch.
  • Page 582 CABIN M6800 · M6800S · M8200 · M9000, WSM (1) Battery (4) A/C Switch (7) A/C Pressure Switch (10) Blower Motor (2) Slow Blow Fuse (5) Compressor Relay (8) Compressor (11) Blower Resistance (3) Main Switch (6) Thermo Switch (9) A/C Main Relay...
  • Page 583 CABIN M6800 · M6800S · M8200 · M9000, WSM (5) Thermostat If the evaporator fin temperature, that is, refrigerant vaporizing temperature, drops below 0 °C (32 °F), frost or ice will form on the fins, causing a decrease in air flow and lowering cooling capacity.

  • Page 584: Windshield Wiper

    CABIN M6800 · M6800S · M8200 · M9000, WSM 4. WINDSHIELD WIPER [1] FRONT WINDSHIELD WIPER Front wiper motor is of the ferrite magnet type and possesses the function to stop the wiper arm (1) at a designed position. The wiper linkage changes rotating motion of the output shaft of the motor into reciprocating movement, which moves the wiper arm (1).
  • Page 585 CABIN M6800 · M6800S · M8200 · M9000, WSM [2] REAR WINDSHIELD WIPER Rear wiper motor is of the ferrite magnet type and possesses the function to stop the wiper arm (1) at a desired position as same as the front wiper motor.
  • Page 586 CABIN M6800 · M6800S · M8200 · M9000, WSM 5. OPC (OPERATOR PRESENCE CONTROL) EQUIPPED) [1] SYSTEM OUTLINE AND ELECTRICAL CIRCUIT NOTE • Refer to “8. OPC system” at section 9 Electrical System. (1) Seat Switch (2) OPC Buzzer Timer...
  • Page 587 SERVICING CONTENTS 1. TROUBLESHOOTING ..................10-S1 2. SERVICING SPECIFICATIONS ..............10-S6 3. TIGHTENING TORQUES ................10-S7 4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE ......10-S8 [1] HANDLING OF SERVICE TOOLS............10-S9 (1) Manifold Gauge Set ................10-S9 (2) Refrigerant Charging Hose .............10-S11 (3) Vacuum Pump Adaptor..............10-S12 (4) Electric Gas Leak Tester..............10-S12 (5) Can Tap Valve ................10-S12 (6) T-joint ....................10-S13 (7) R134a Refrigerant Recovery and Recycling Machine ....10-S13...
  • Page 588 CABIN M6800 · M6800S · M8200 · M9000, WSM 1. TROUBLESHOOTING COMPRESSOR Reference Symptom Probable Cause Solution Page Noisy (Compressor ON) • Bearing of compressor worn or damaged Replace 10-S29 • Valves in compressor damaged Replace – • Belt slipping...
  • Page 589 CABIN M6800 · M6800S · M8200 · M9000, WSM AIR CONDITIONING SYSTEM (Continued) Reference Symptom Probable Cause Solution Page Insufficient Cooling (Compressor Does • Belt slipping Adjust or replace 10-G5 Not Rotate Properly) • Magnetic clutch defective Repair or replace 10-S29 to •...
  • Page 590 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-S3 KiSC issued 03, 2008 A...
  • Page 591 CABIN M6800 · M6800S · M8200 · M9000, WSM 10-S4 KiSC issued 03, 2008 A...
  • Page 592 CABIN M6800 · M6800S · M8200 · M9000, WSM WASHER MOTOR Reference Symptom Probable Cause Solution Page Washer Motor Does • Fuse blown Correct cause and – Not Operate replace • Washer switch defective Replace 10-S38, • Washer motor defective Replace –...

  • Page 593: Servicing Specifications

    CABIN M6800 · M6800S · M8200 · M9000, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Air-gap of A/C Compressor Magnet Clutch Swash Plate Type 0.25 to 0.50 mm – Compressor 0.010 to 0.020 in. Scroll Type 0.35 to 0.65 mm –...
  • Page 594 CABIN M6800 · M6800S · M8200 · M9000, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to “6. TIGHTENING TORQUES” at GENERAL Section.) Item N·m...

  • Page 595: Precautions At Repairing Refrigerant Cycle

    CABIN M6800 · M6800S · M8200 · M9000, 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 596: Handling Of Service Tools

    CABIN M6800 · M6800S · M8200 · M9000, WSM (Reference) Replenish Quantity Replacing Parts Brand Name Type 2 and 3 Type 1 (swashplate Type) (Scroll Type Compressor) 40 cc 20 cc Condenser 0.042 U.S.qts. 0.021 U.S.qts. 0.036 Imp.qts. 0.018 Imp.qts.
  • Page 597 CABIN M6800 · M6800S · M8200 · M9000, WSM When LO Valve is Closed and HI Valve is Opened Two circuits are established. Port (C) → HI pressure gauge (2) → Port (B) → Port (D) (Schrader valve must be opened) Port (A) →...

  • Page 598: Refrigerant Charging Hose

    CABIN M6800 · M6800S · M8200 · M9000, 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...

  • Page 599: Vacuum Pump Adaptor

    CABIN M6800 · M6800S · M8200 · M9000, 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 600: T-Joint

    CABIN M6800 · M6800S · M8200 · M9000, 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 601: Checking And Charging Refrigerant Cycle

    CABIN M6800 · M6800S · M8200 · M9000, 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 602 CABIN M6800 · M6800S · M8200 · M9000, 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 0.1 MPa (0.5 to 1.0 kgf/cm , 7.1 to 14.2 psi)
  • Page 603 CABIN M6800 · M6800S · M8200 · M9000, WSM Moisture Entered in the Cycle 1. Symptoms seen in refrigerating cycle - The air conditioner operates normally at the beginning, but over time, LO pressure side (1) pressure is vacuum and HI pressure side (2) is low pressure.
  • Page 604 CABIN M6800 · M6800S · M8200 · M9000, WSM Expansion Valve Opens Too Far or Improper Installation of Heat Sensitizing Tube 1. Symptoms seen in refrigerating cycle - Both LO and HI pressure side (1), (2) pressures too high. LO pressure side (1) : 0.29 to 0.39 MPa (3.0 to 4.0 kgf/cm...

  • Page 605: Discharging Evacuating And Charging

    CABIN M6800 · M6800S · M8200 · M9000, WSM [2] DISCHARGING EVACUATING AND CHARGING IMPORTANT • When discharging, evacuating or charging the refrigerating system, be sure to observe the “PRECAUTION AT REPAIRING REFRIGERANT CYCLE”. (See page 10-S8.) (1) Discharging the System Prepare for the R134a refrigerant recovery and recycling machine.
  • Page 606 CABIN M6800 · M6800S · M8200 · M9000, WSM Evacuating the System 1. Discharge refrigerant from the system by R134a refrigerant recovery and recycling machine. (Refer to “Discharging the system”.) 2. Connect the charging hose (5) (red) to the HI pressure side charging valve and connect the charging hose (6) (blue) to the LO pressure side charging valve.

  • Page 607: Charging The System

    CABIN M6800 · M6800S · M8200 · M9000, WSM (3) Charging the System 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 608 CABIN M6800 · M6800S · M8200 · M9000, 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 placed right side up, refrigerant will enter the system as a vapor.

  • Page 609: Checking Charge Refrigerant Amount

    CABIN M6800 · M6800S · M8200 · M9000, 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 are 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 610: Checking, Disassembling And Servicing

    CABIN M6800 · M6800S · M8200 · M9000, WSM 6. CHECKING, DISASSEMBLING AND SERVICING [1] SEPARATING CABIN FROM TRACTOR BODY (1) Disassembling and Assembling Draining Coolant CAUTION • Never remove the radiator cap until coolant temperature is well below its boiling point. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
  • Page 611 CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 3 1. Disconnect the connectors (1) and pull out it from cabin. 2. Disconnect the brake rod R.H. (2) from turnbuckle and remove it. (When reassembling) • Be sure to adjust the brake pedal free travel.
  • Page 612 CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 4 1. Remove the floor mat 1 (1), floor mat 2 (2) and cover 1 (3), cover 2 (4). 2. Disconnect the shuttle shift rod (5) and main shift rod (6).
  • Page 613 CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 5 1. Disconnect the brake rod L.H. (1) from turnbuckle and remove it. 2. Disconnect the clutch cable (2). 3. Remove the cap stay (3). (When reassembling) • Be sure to adjust the clutch pedal free travel.
  • Page 614 CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 7 1. Disconnect the differential lock rods (1), (2). 2. Disconnect the position control rod (3) and draft control rod (4). 3. Disconnect the PTO wire (5). (When reassembling) • Be sure to adjust the position rod length A and draft rod length B.
  • Page 615 CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 8 1. Disconnect the auxiliary control valve wire (2). NOTE • Available auxiliary control valves are as table below. Abbreviation Type of auxiliary control valve Self-Cancelling Detent Valve SCD/FC Self-Cancelling Detent with Flow Control Valve...

  • Page 616: Compressor

    CABIN M6800 · M6800S · M8200 · M9000, WSM Preparation 9 1. Remove the hose clamps (1). 2. Disconnect the low pressure pipe (3) from receiver. 3. Disconnect the high pressure pipe (2) from compressor. IMPORTANT • Be sure to seal the low and high pressure pipe joint ports to keep dry condition for the receiver.

  • Page 617: Disassembling And Assembling

    CABIN M6800 · M6800S · M8200 · M9000, WSM (2) Disassembling and Assembling NOTE • There are two type of compressors, one is swash plate type, the other one is scroll type. Affected serial number as below. Serial Number Model...
  • Page 618 CABIN M6800 · M6800S · M8200 · M9000, WSM Hub Plate or Center Piece 1. Three stopper bolts (1) are set in stopper magnet clutch (2) at the position corresponding to the shape of compressor. (See page 10-G13.) 2. The stopper magnet clutch (2) is hung on hub plate (3) and it is fixed that the compressor rotates.

  • Page 619: Servicing

    CABIN M6800 · M6800S · M8200 · M9000, WSM Stator 1. Remove the lead wire from compressor body. 2. Remove the external circlip (1) (scroll type compressor). 3. Remove the stator (2). (When reassembling) • Do not use the cir-clip again.

  • Page 620: Air Conditioning System And Front Windshield Wiper

    CABIN M6800 · M6800S · M8200 · M9000, WSM [3] AIR CONDITIONING SYSTEM AND FRONT WINDSHIELD WIPER (1) Checking (A) Air Conditioner Unit 1) Connector Voltage (A/C Main Relay, Compressor Relay) 1. When turning the main switch “ON” and voltage across the 1 terminal and chassis should be approx.
  • Page 621 CABIN M6800 · M6800S · M8200 · M9000, WSM Blower Switch Test 1. Check the continuity through the switch with an ohmmeter. 2. If the continuity specified below are not indicated, the switch is faulty. Terminal Position Blower switch Medium...
  • Page 622 CABIN M6800 · M6800S · M8200 · M9000, WSM (D) Blower Resistor Blower Resistor Check 1. Disconnect the 4P connector (2) for blower resistor (1). 2. Measure the resistance with an ohmmeter across the Hi terminal and Me terminal, and across the Lo terminal and Me terminal.
  • Page 623 CABIN M6800 · M6800S · M8200 · M9000, WSM 2) Relay Test 1. Remove the relay (1). 2. Connect the battery (2) and bulbs (3) with the relay (1) as shown in the figure left. 3. If the bulb on when connecting the jumper lead (A) from the relay 2 terminal and if the bulb off when disconnecting the jumper lead (A) to the relay 2 terminal, the relay is proper.
  • Page 624 CABIN M6800 · M6800S · M8200 · M9000, WSM (G) A/C Pressure Switch HI Pressure Side 1. Connect the manifold gauge (3) to compressor as following procedure. Close the HI and LO pressure valves (5), (4) of manifold gauge tightly, and connect the charging hoses (red and blue) (6), (7) to the respective compressor service valves.
  • Page 625 CABIN M6800 · M6800S · M8200 · M9000, WSM (H) Front Windshield Wiper Front Wiper Switch 1. Remove the outer roof, and disconnect the front wiper connector (1). 2. Perform the following checkings 1) and 2). 1) Connector Voltage 1. Turn the main switch ON.

  • Page 626: Disassembling And Assembling

    CABIN M6800 · M6800S · M8200 · M9000, WSM (2) Disassembling and Assembling (A) Removing Air Conditioner Unit and Front Wiper Motor Draining Coolant CAUTION • Never remove the radiator cap until coolant temperature is well below its boiling point. Then loosen cap slightly to...
  • Page 627 CABIN M6800 · M6800S · M8200 · M9000, WSM A/C Mode Door Control Cable (Yellow Cable) 1. Disconnect the air conditioner mode door control cable (3) from the def. control lever (1) of A/C control panel side. (When reassembling) • Set the air conditioner unit to DEF mode position and reconnect the cable (3).
  • Page 628 CABIN M6800 · M6800S · M8200 · M9000, WSM Air Conditioning Unit 1. Remove the unit cover (1). 2. Disconnect the heater hoses (8). 3. Disconnect the cooler pipe (liquid) (2) and cooler pipe (suction side) (3). 4. Remove the five screws (7) and take off the unit.
  • Page 629 CABIN M6800 · M6800S · M8200 · M9000, WSM (B) Removing Air Conditioner Pipes Discharging Refrigerant 1. Refer to “Discharging the System”. (See page 10-S18.) W1032195 Muffler and Bonnet 1. Disconnect the battery cable (3). 2. Remove the muffler (1).
  • Page 630 CABIN M6800 · M6800S · M8200 · M9000, WSM Removing High Pressure and Low Pressure Pipes 1. Remove the outer roof. 2. Disconnect the pressure switch (1) connector. 3. Disconnect the high pressure pipe 2 (2), then cap the open fitting immediately to keep moisture out of the system.

  • Page 631: Servicing

    CABIN M6800 · M6800S · M8200 · M9000, WSM Heater Hoses 1. Disconnect the heater hoses (1), (2), and take out them under the cabin. NOTE • Connect the heater hose (1) to the heat hose which comes from cabin with blue painted hose.

  • Page 632: Lighting System

    CABIN M6800 · M6800S · M8200 · M9000, WSM [4] LIGHTING SYSTEM (1) Checking (A) Working Light Working Light Switch 1. Remove the outer roof, and disconnect the working light switch connector (1) from the switch (2) connector. 2. Perform the following checkings 1) and 2).

  • Page 633: Opc (Operator Presence Control) System

    CABIN M6800 · M6800S · M8200 · M9000, WSM [5] OPC (OPERATOR PRESENCE CONTROL) SYSTEM (IF EQUIPPED) (1) Checking (A) OPC Timer OPC Buzzer Timer and Seat Switch 1. Refer to 9.Electrical System. (1) Buzzer (2) OPC Buzzer Timer W1093824...
  • Page 634 CABIN M6800 · M6800S · M8200 · M9000, WSM 2) Rear Wiper Switch 1. Check the continuity through the switch with an ohmmeter. 2. If continuity specified below is not indicated, the switch is faulty. Terminal – Position WASH I...
  • Page 635 CABIN M6800 · M6800S · M8200 · M9000, 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 636 CABIN M6800 · M6800S · M8200 · M9000, WSM Applying Sika Tack-Ultrafast 1. Apply a Sika Tack-Ultrafast (or equivalent) on the glasses as shown in the figure left. NOTE • Apply the Sika Tack-Ultrafast (or equivalent) with the jig having the specified tip shape as shown in the figure left.
  • Page 637 CABIN M6800 · M6800S · M8200 · M9000, WSM (B) Rear Windshield Wiper Rear Wiper Motor 1. Remove the wiper motor cover (5). 2. Disconnect the rear wiper motor 4P connector (2). 3. Remove the wiper arm mounting nut (4) and wiper arm (6).
  • Page 638 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 : ksos-pub@kubota.co.jp Printed in Japan 2008. 03, S, E I , E I , e Code No.9Y011-18008 KUBOTA Corporation 2001.

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M6800M8200M9000

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