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.
What's Inside This Kubota B6100HST, B7100HST 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. 351 |
| 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 |
Kubota B6100HST, B7100HST Common Problems This Manual Covers
Starter will not crank
A no-crank condition usually traces to a loose connection in the starting circuit, a failed safety switch, ignition switch wiring, or the starter solenoid. The electrical system section covers testing the starter, switches, and safety circuit.
Manual Section: Electrical System p. 309HST loses drive or push power
Owners report the hydrostatic drive going weak under load, sometimes with a loud whine, from internal wear or hydraulic pressure loss. The New HST transmission section covers the mechanism and servicing of the hydrostatic drive.
Manual Section: Transmission (New HST) p. 193Weak or slow hydraulic lift
Fluid contamination, a low fluid level, or pump wear leave the three-point hydraulics slow or weak. The hydraulic system section covers the pump, control valve, and cylinder with their service specifications.
Manual Section: Hydraulic System p. 282Engine overheating
Overheating on these tractors comes from a restricted radiator, low coolant, or blocked airflow. The cooling system section covers checking radiator water tightness and the radiator cap opening pressure.
Manual Section: Cooling System p. 92Low oil pressure concern
Owners investigate low oil pressure, sometimes tied to a lost press-fit crankshaft plug reported on this engine. The lubrication system section covers checking oil pressure, the relief valve, and the oil pump.
Manual Section: Lubrication System p. 81Clutch drag or wrong pedal free travel
A dragging clutch or incorrect pedal free travel makes shifting difficult. The clutch section covers checking release lever height, disk wear, and clutch pedal free travel.
Manual Section: Clutch p. 118Frequently Asked Questions
Which tractors does this manual cover?
It covers the Kubota B6100HST and B7100HST tractors, including their D650-AH and D750-AH diesel engines, across the 2WD and 4WD serial-number ranges listed inside.
Does it give head bolt torque specs?
Yes. The engine body section lists tightening torques, including head bolts and nuts at 39.2 to 44.1 N·m (28.9 to 32.5 ft-lbs) for the M8x1.25 size. p. 35
Does it cover the hydrostatic transmission?
Yes. The Transmission (New HST) section covers the traveling system and hydrostatic transmission mechanism plus its servicing, which is the reference for a weak or whining HST drive. p. 193
Does it include electrical and wiring troubleshooting?
Yes. The electrical system section covers the battery, key switch, starter, glow plug and safety switch, and the AC dynamo and regulator with their servicing steps. p. 309
What exactly do I receive with this Kubota B6100HST Workshop Manual?
Instant PDF download. The full 377-page searchable Workshop Manual is available the moment payment clears. Open it on a laptop, tablet, or phone right in the shop.
Is this Kubota B6100HST manual print-friendly?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Can I find wiring schematics in this Kubota B6100HST manual?
Yes, this Kubota B6100HST, B7100HST Workshop Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Reviews
There are no reviews yet.