This is the factory workshop manual for the Kubota B26 tractor, TL500 front loader and BT820 backhoe, publication 9Y111-00042, built around the D1105 diesel engine. Its 448 pages treat the tractor, loader and backhoe as one machine, with General, Mechanism and Servicing coverage for each system.
You get engine troubleshooting and servicing specs, the HST transmission and hydraulic circuits, rear and front axles, brakes, power steering, the full hydraulic system, the electrical system with wiring diagrams and OPC safety circuit, plus dedicated front loader and backhoe sections covering their control valves, relief valves and cylinders.
It is the reference for real repair work: tightening torques, clearances, disassembly and assembly, checking and adjusting. Owners and independent mechanics use it to diagnose faults and rebuild components correctly. Download the PDF after purchase and print the procedures you need in the shop.
What's Inside This Kubota B26, TL500, BT820 Manual
| System | Pages | Key Topics |
|---|---|---|
| G General | - | Tractor Identification, E3 Engine, Electrical Parts Handling, lubricants/fuel/coolant, Tightening Torques, Scheduled Maintenance Intervals, Special Tools, Tires, Implement Limitations |
| Engine | - | Troubleshooting, Servicing Specifications, Separating Engine, Checking and Adjusting, Disassembling and Assembling, Servicing Internals |
| Transmission | - | HST Pump and Motor, Oil Flow and Valves, Range Gear Shift, Front Wheel Drive, Differential Lock, Independent PTO Clutch and Hydraulic Circuit, Control Linkage |
| Rear Axle | - | Structure, Disassembling and Assembling, Servicing, Rear Axle Torque Specs |
| Brakes | - | Feature and Operation, Checking and Adjusting, Disassembling and Assembling, Servicing, Brake Specifications |
| Front Axle | - | Structure, Separating Front Axle Assembly, Disassembling Front Axle Assembly, Checking and Adjusting, Servicing |
| Steering | - | Hydraulic Circuit, Steering Controller, Steering Cylinder, Relief Valve Checking, Power Steering Controller Disassembly, Power Steering Cylinder Servicing |
| Hydraulic System | - | Hydraulic Pump, Front Loader Control Valve Operation, 3-Point Hitch Position Control, Feedback Linkage, Surge Relief Valve, Lift Arm Adjustment, Hydraulic Cylinder Disassembly |
| Electrical System | - | Wiring Diagram, Opc System Circuit, Engine Starting and Stopping, head/tail/turning Lights, Easy Checker Indication Items, Checking and Adjusting |
| Front Loader | - | Front Loader Control Valve and Relief Valve, Boom and Bucket Cylinders, Maintenance Check List, Dismounting and Mounting, Spill Guard Adjustment, Loader Identification |
| Backhoe | - | Hydraulic Circuit, Control Valve, boom/dipperstick/bucket/swing/stabilizer Cylinders, Backhoe Identification, Dismounting and Mounting, Disassembling Backhoe |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| B26 | ||
| Main frame mounting bolt and nut (M16) tightening torque | 200 to 225 N·m | p. 37 |
| HST oil filter replacement interval | every 200 Hr | p. 27 |
| Engine oil filter tightening | Tighten filter by hand an additional 1/2 turn only | p. 33 |
| Fuel filter element replacement interval | every 400 Hr | p. 27 |
| Air cleaner primary element cleaning pressure | under 205 kPa (2.1 kgf/cm2, 30 psi) | p. 38 |
| Engine Oil Capacity (with filter) | 3.0 L (3.2 U.S.qts) | p. 10 |
| Fuel Tank Capacity | 31 L (8.1 U.S.gals) | p. 10 |
| TL500 | ||
| Bucket cylinder head mounting torque | 250 to 300 N·m | p. 366 |
| Boom Cylinder piston seal slide jig dimension (C) | 50.18 mm / 1.98 in. | p. 374 |
| BT820 | ||
| Stabilizer cylinder head tightening torque | 500 to 550 N·m | p. 432 |
| All Functions Inoperative (Front Loader Is OK) - Probable Cause | Quick coupler disconnected | p. 430 |
| All Models | ||
| Hydraulic hose fitting, flare nut (3/4) tightening torque | 36 to 40 N·m | p. 26 |
Kubota B26, TL500, BT820 Common Problems This Manual Covers
Loader or backhoe hydraulics weak
Slow, weak or drifting loader and backhoe function is the most common B26 complaint, usually low fluid, a clogged filter, a worn pump or a tired relief valve. The Hydraulic System section covers the pump, control valves, relief valves and cylinder service.
Manual Section: 7 Hydraulic System p. 263Machine loses drive when hot
When the tractor creeps poorly or stops moving once warm, the hydrostatic transmission, its charge pump or filters are the usual suspects. The Transmission section covers the HST pump, motor, oil flow and valves.
Manual Section: 2 Transmission p. 129Backhoe functions become erratic
After long use the backhoe can go erratic from overheated or contaminated oil and sticking control valve spools. The Backhoe section covers the control valve and boom, dipperstick, bucket, swing and stabilizer cylinders.
Manual Section: 10 Backhoe p. 377Engine hard to start or low on power
Hard starting, surging or weak power usually traces to fuel restriction, a clogged air filter or glow plug and preheat faults. The Engine section covers troubleshooting, servicing specifications and adjustment.
Manual Section: 1 Engine p. 67Brakes weak or uneven
Brakes that feel weak or grab unevenly need adjustment or have worn linings. The Brakes section covers checking, adjusting and the brake specifications.
Manual Section: 4 Brakes p. 215Heavy or inconsistent steering
Steering that feels heavy or wanders points to low hydraulic level or wear in the steering circuit. The Steering section covers the hydraulic circuit, steering controller, cylinder and relief valve checking.
Manual Section: 6 Steering p. 247Frequently Asked Questions
What machines does this workshop manual cover?
It is the factory workshop manual for the Kubota B26 tractor, TL500 front loader and BT820 backhoe, publication 9Y111-00042, with the D1105 diesel engine. It covers the tractor, loader and backhoe as one set.
Does it include torque specifications?
Yes. The General section lists tightening torques for bolts, plugs and hydraulic fittings, and each section adds its own specs, such as rear wheel mounting bolts and loader and backhoe cylinder torques. p. 13
Will it help me service the loader and backhoe hydraulics?
Yes. The Hydraulic System section covers the pump, control valves and cylinders, while the Front Loader and Backhoe sections add their own control and relief valve service and cylinder rebuild steps. p. 263
Which section covers the wiring?
The Electrical System section covers the wiring diagram, the OPC safety circuit, engine starting and stopping, the head, tail and turning lights and the easy checker indicators. p. 308
Will this Kubota B26 Workshop Manual download right away?
Yes, a 448-page searchable PDF ready for immediate download. Pull it up on your phone at the machine. No shipping, no waiting.
Is this Kubota B26 manual print-friendly?
None. The PDF has no DRM, so print any page or section you need on a standard printer.
Are there hydraulic schematics in this Kubota B26 manual?
Yes. Hydraulic system diagrams, circuit schematics, and component specifications are all included.
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