This Kubota M6800 service manual pdf runs the full M6800, M6800S, M8200, and M9000 family, HD, Hydraulic Shuttle, DNB, and DT variants included, so one file covers your whole fleet. The hydraulic schematics trace the three-point lift circuit, power steering pump, and auxiliary control valves; wiring diagrams cover both open-station and cab builds. Procedures run deep: 500 pages of disassembly, adjustment, and rebuild work, 100 pages of exploded views, and 13 pages of troubleshooting charts spanning the drivetrain and hydraulic systems. Before the first start, set the M6800S fuel tank at 65 L, the M8200 at 90 L, and fill each engine with 10.7 L of oil. When the machine is down, every idle hour costs you. Search by keyword and jump straight to any system through the bookmarks.
What's Inside This Kubota M6800–M9000 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 13-76 | Features, Tractor Identification, Handling Precautions For Electrical Parts And Wiring (Battery, Fuse, Connector, Handling Of Circuit Tester), Lubricants Fuel And Coolant |
| Sect 1 Engine | 77-146 | Engine Body (Cylinder Block, Crankshaft), Fuel System (Fuel Filter), Turbo Charger System (Boost Compensator) |
| Sect 2 Clutch | 147-176 | Travelling Clutch, PTO Clutch (Features, Travelling Clutch Linkage, Operation, Structure, Oil Flow, Valve, Shift Linkage) |
| Sect 3 Transmission | 177-258 | Structure (M6800, M6800S, M8200 M9000), Travelling System (Main Gear Shift Section, Shuttle Shift Section, Hi-Creep Shift Section, Four Wheel Drive Section) |
| Sect 4 Rear Axle | 259-274 | Features, Final Reduction System (M6800, M8200 M9000), Servicing (Troubleshooting, Specifications, Tightening Torques, Checking, Disassembling and Servicing) |
| Sect 5 Brakes | 275-288 | Features, Operation, Servicing (Troubleshooting, Specifications, Tightening Torques, Checking and Adjusting, Disassembling and Assembling) |
| Sect 6 Front Axle | 289-322 | Structure, Front Wheel Alignment (Wheel Drive Type, Camber, Kingpin Angle, Caster, Toe-in) |
| Sect 7 Steering | 323-352 | Steering Mechanism, Power Steering Hydraulic Circuit, Power Steering System Hydraulic Pump, Steering Controller (Control Valve, Metering Device, Oil Flow), Steering Cylinder |
| Sect 8 Hydraulic | 353-430 | Three Point Hydraulic System, Hydraulic Circuit For Three Point Hydraulic System, Hydraulic Pump, Oil Filter, Position Control Valve (M6800, M8200 M9000), Relief Valve |
| Sect 9 Electrical | 431-494 | Wiring Diagram, Starting System (Starter Motor, Glow Control System), Engine Key Switch Shut-Off System, Charging System (IC Regulator), Lighting System (Destination) |
| Sect 10 Cab | 495-598 | Wiring Diagram, Lighting System, Air Conditioner System (Principles Of Air Conditioner, Outline Of Air Conditioning System, Refrigeration System, System Control, Electrical System) |
| Supplement M6800 M8200 M9000 Super Cab 2 | 599-644 | G. General (Features, Lubricants Fuel And Coolant, Check And Maintenance, Special Tool), Clutch (Servicing), Transmission (Mechanism, Servicing) |
| Supplement M6800Hd | 645-700 | Safety Instructions, Specifications, G. General (Features, Mentenance, Check And Maintenance, Special Tool), Clutch (Servicing), Transmission (Mechanism, Servicing) |
| Supplement M8200 M9000 Hydraulic Shuttle | 701-774 | Safety Instructions, Specifications, G. General (Features, Maintenance, Check And Maintenance, Special Tool), Clutch (Servicing), Transmission (Mechanism, Servicing) |
| Supplement M8200Dnb M8200Sdnb M8200Sdnbc | 775-918 | Safety Instructions, Specifications, Dimensions, G. General (Features, Lubricants, Fuel And Coolant, Mentenance, Check And Maintenance, Special Tool, Others, Implement Limitations) |
| Supplement M9000Dt-L | 919-926 | Specifications, Dimensions, G. General (Lubricants, Fuel And Coolant, Tires), Transmission, Rear Axle, Front Axle |
| Supplement M9000Dt-M | 927-960 | Specifications, Dimensions, G. General, Transmission, Rear Axle, Front Axle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| M6800(S) | ||
| Fuel tank capacity | 65 L | p. 23 |
| M8200 | ||
| Fuel tank capacity | 90 L | p. 23 |
| All Models | ||
| Engine Oil Capacity | 10.7 L | p. 23 |
| Clutch Pedal Free Travel | 35 to 45 mm | p. 30 |
| Fan Belt Deflection | 10 to 12 mm | p. 35 |
| Rear Wheel Mounting Nut Torque | 260 to 304 N·m | p. 33 |
| M6800 M6800S | ||
| Coolant Capacity | 8.5 L | p. 23 |
| Transmission Case Oil Capacity | 40 L | p. 23 |
| M8200 M9000 | ||
| Coolant Capacity | 9.0 L | p. 23 |
| Transmission Case Oil Capacity | 52 L | p. 23 |
| 2WD | ||
| Front Wheel Mounting Nut Torque | 168 to 296 N·m | p. 33 |
| 4WD | ||
| Front Wheel Mounting Nut Torque | 260 to 304 N·m | p. 33 |
Kubota M6800–M9000 Series Common Problems This Manual Covers
Kubota M8200 hydraulic three-point hitch won't lift implement or lifts slowly under load p. 353
Check the hydraulic oil level in the transmission case; the M8200 holds 52 L (page 23). Trace the circuit using the hydraulic schematic. Verify the position control valve moves freely and inspect the oil filter for contamination. If pressure remains low, clean or replace the filter element before opening the pump.
Manual Section: Sect 8 HydraulicEngine won't start or cranks slowly in cold weather, glow plugs suspected
Inspect the glow plug circuit and verify battery charge before condemning the starter. Check engine oil level; capacity is 10.7 L (page 23). If the engine cranks but won't fire, bleed the fuel system of air and confirm the fuel filter was replaced at the 200-hour service interval (page 26). Review no-start procedures.
Manual Section: Sect 1 EngineClutch pedal goes to floor, tractor creeps forward with pedal fully depressed p. 147
Measure clutch pedal free travel; specification is 35 to 45 mm (page 30). If travel is out of range, adjust the linkage per the clutch section starting at page 147. Inspect the disc for oil contamination, which causes slipping and chatter. Drain any accumulated water from the clutch housing through the drain plug.
Manual Section: Sect 2 ClutchPower steering requires excessive force to turn, steering wheel hard or groans p. 323
Verify fan belt deflection: 10 to 12 mm is the correct spec (page 35). A loose belt starves the power steering pump of drive. Check fluid level in the transmission case, then inspect the steering hydraulic circuit at page 323. Look for kinked or collapsed lines and confirm the pump builds pressure before disassembling the steering controller.
Manual Section: Sect 7 SteeringBattery discharges quickly between uses, starter motor slow to crank or won't engage p. 431
Test the battery voltage and check all fuses with the cabin fuse chart on page 612. A slipping alternator belt is a common culprit; confirm deflection measures 10 to 12 mm (page 35). Review the wiring diagram for corroded grounds. Inspect the charging system's IC regulator in the electrical section starting at page 431.
Manual Section: Sect 9 ElectricalTransmission gears hard to shift, pop out of mesh, or clash during engagement p. 177
Confirm clutch pedal free travel sits within 35 to 45 mm (page 30) before suspecting the gearbox. Incomplete clutch release is the top reason gears clash on shift. Compare transmission oil level against spec: M8200 and M9000 hold 52 L, M6800 holds 40 L (page 23). Inspect the shift linkage, then consult the transmission section at page 177.
Manual Section: Sect 3 TransmissionFrequently Asked Questions
What are the recommended service intervals?
The manual provides a maintenance check list with various service intervals. For example, the engine oil filter should be replaced every 200 hours, the air cleaner element should be cleaned every 100 hours (or more often in dusty conditions), and the transmission fluid should be changed every 600 hours. Other items like the fuel filter are replaced every 400 hours, and the hydraulic oil filter every 200 hours.
What fluids and capacities does this machine require?
The machine requires Diesel fuel NO.1 or NO.2-D for the fuel tank, with capacities of 65 L (17.2 U.S.gals.) for M6800(S) and 90 L (23.8 U.S.gals.) for M8200/M9000. The engine crankcase uses API Service Classification CC or CD engine oil, with a capacity of 10.7 L (11.3 U.S.qts.). The transmission case requires KUBOTA SUPER UDT fluid, with capacities of 40 L (42.3 U.S.qts.) for M6800(S) and 52 L (54.9 U.S.qts.) for M8200/M9000.
How to troubleshoot engine won't start?
If the engine does not start, common probable causes include no fuel (solution: replenish fuel), air in the fuel system (solution: vent air, page G-30), or a discharged/defective battery (solution: charge/repair, page 9-S14). Other issues could be a clogged fuel filter (solution: replace, page G-25) or incorrect injection timing (solution: adjust, page 1-S56).
Document Quality
This document is a scanned PDF, but it includes an OCR layer, so you can search and copy the full text. The text quality is generally crisp and easy to read, with good contrast throughout. Diagrams and illustrations are raster images; they are clear enough to understand, and their labels are readable, though they may show slight pixelation when zoomed in. The pages are clean with no significant marks or stains, but please note there are several blank pages interspersed within the document.
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