Part of the Kubota Repair Manuals.
This is the Kubota factory workshop manual for the BH70 backhoe, publication 9Y111-13460. It is the service level document, organized into Information, General, Mechanism, and Servicing sections covering identification, specifications, the hydraulic control valve, and complete repair procedures.
The Mechanism section details the hydraulic circuit, the control valve structure and operation, the overload relief valve, and the hydraulic cylinders. The Servicing section adds troubleshooting, servicing specifications, tightening torques, and checking, disassembling, and adjusting procedures for the valve and cylinders.
Use it to diagnose a sluggish or sticking dipper function, correct a sloppy bucket curl lever, verify relief valve pressure, torque the sub frame and cylinder hardware to spec, and rebuild worn cylinders. It is a downloadable PDF you can open on any device or print for the shop, so the diagrams and torque tables are on hand while you work.
Complete the set for your BH70
- Operator Manual: Kubota BH70 Backhoe Operator Manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | Identification, Lubricants, Tightening Torques (Stud Bolts, American Standard Screws, Bolts and Nuts with, Plugs, Hydraulic Fittings), Maintenance Check List | |
| Mechanism | Hydraulic Circuit, Control Valve (Structure, Operation, Overload Relief Valve), Hydraulic Cylinder | |
| Servicing | Troubleshooting, Servicing Specifications, Tightening Torques, Checking, Disassembling and Servicing (Checking and Adjusting, Disassembling and Assembling) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Control Lever Operating Force | 10 to 15 N (1.0 to 1.5 kgf, 2.3 to 3.3 lbf) | p. 50 |
| Relief Valve Pressure | 13.0 to 13.8 MPa (133 to 140 kgf/cm², 1890 to 2000 psi) | p. 50 |
| Digging force (With bucket cylinder) | 12900 N | p. 12 |
| Boom cylinder, extend cycle time | 3.4 seconds | p. 12 |
| Transmission Case Capacity (B2301, B2601) | 15 L | p. 19 |
| M10 (8.8 Property class) bolt tightening torque | 48 to 55 N-m | p. 20 |
| Sub frame mounting bolt and nut (M16) torque | 176 to 203 N·m | p. 25 |
| Relief Valve Setting Pressure (Dipperstick boom) | 17.20 to 17.69 MPa | p. 44 |
| Boom Cylinder Rod O.D. | 30.0 mm | p. 46 |
| Boom Cylinder Rod Pin to Cylinder Bushing Clearance (Allowable Limit) | 1.0 mm | p. 50 |
| Boom cylinder head tightening torque | 350 to 400 N-m | p. 52 |
| Piston Rod Bend (Allowable Limit) | 0.25 mm | p. 68 |
