This is the factory workshop manual for the Kubota B6100HST and B7100HST tractors, a 377-page PDF you can download and print. It covers both models and their Kubota D650-AH and D750-AH diesel engines, with the mechanism, servicing procedures, factory specifications, and allowable limits for every system.
Sections run the full tractor: engine body, lubrication, cooling, and fuel systems, the clutch, the gear transmission and the New HST hydrostatic drive, rear axle and differential, front axle, tires and front alignment, steering, brakes, the hydraulic system, and the electrical system. Serial-number ranges for the 2WD and 4WD versions are documented so you can confirm the manual matches your tractor.
Use it to diagnose a fault, follow disassembly and reassembly steps, and set torques and clearances to spec. It is the right reference for teardown-level repair rather than day-to-day operation.
Complete the set for your B6100HST, B7100HST
- Operator Manual: Kubota B6100HST, B7100HST Operator Manual (incl. Wiring)
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | Tractor Identification (Serial Number, Tractor Serial Number and Transmission Serial Number, Engine Serial Number) | |
| Engine Body | Assembly (Assembling: Cylinder Head, Injection Pump and Fuel Pump, Gear Case, Camshaft and Oil Pump, Piston and Crankshaft) | |
| Lubrication System | Servicing (Checking Oil Pressure, Oil Filter, Oil Filter Cartridge, Relief Valve, Oil Pump) | |
| Cooling System | Servicing (Checking: Radiator Water Tightness, Opening Pressure of Radiator Cap) | |
| Fuel System | Fuel Filter (Removal and Installation, Replacing Filter Element), Fuel Pump | |
| Clutch | Servicing (Checking: Height of Release Lever, Clutch Disk, Wear, Scratches and Cracks on Pressure Plate, Clutch Pedal Free Travel) | |
| Transmission | Gear Transmission (Drive System, Front Wheel Drive Mechanism, PTO Transmission) | |
| Transmission (New HST) | Mechanism (Traveling System, Hydrostatic Transmission) | |
| Rear Axle Differential | Disassembly (Rear Axle, Differential Gear) | |
| Front Axle | Disassembly | |
| Tires, Front Alignment | Wheel Weights, Front Wheel Alignment (Kingpin Inclination, Camber, Caster, Toe-In), Checking Toe-In, Checking Tire Pressure, Checking Rolling Angle | |
| Steering | Disassembly, Servicing (Free Movement of Steering Wheel, Checking End Play of Steering Shaft) | |
| Brakes | Disassembly, Servicing (Checking: Brake Pedals Free Travel, Wear of Brake Lining, Wear of Brake Drum) | |
| Hydraulic System | Hydraulic Pump (Disassembly, Servicing), Control Valve and Cylinder (Disassembly, Hydraulic Block, Oil Filter, Oil Cooler | |
| Electrical System | Battery (Structure and Function, Servicing), Key Switch, Starter (Disassembling Starter, Glow Plug and Safety Switch, AC Dynamo and Regulator, Hourmeter |
Every system also includes specifications.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Neutral adjuster to case tightening torque | 19 to 32 N-m (1.9 to 3.3 kgf·m, 13 to 24 ft-lbs) | p. 207 |
| Head bolts and nuts tightening torque (M8×1.25) | 39.2 to 44.1 N·m (4.0 to 4.5 kgf·m, 28.9 to 32.5 ft-lbs) | p. 75 |
| Head bolts and nuts tightening torque (M9×1.25) | 64.7 to 69.6 N·m (6.6 to 7.1 kgf·m, 47.7 to 51.4 ft-lbs) | p. 75 |
| Front wheel hub nut tightening torque | 82 to 86 Nm (8.4 to 8.8 kgf-m, 61 to 64 ft-lbs) | p. 251 |
| Starter pinion gap (Reference value) | 0.1 to 0.4mm (0.0039 to 0.0157 in.) | p. 351 |
| Starter commutator O.D. (R.V.) | 28.0 mm (1.1024 in.) | p. 375 |
| Starter no-load test voltage | at 11V | p. 351 |
| Key switch rated current (No. "17" and No. "19") | 30A | p. 322 |
| Key switch rated current (No. "50") | 12A | p. 322 |
| Safety switch allowable current | 15A, 12V | p. 351 |
| Safety switch stroke | 10 mm | p. 351 |
