The factory tear-down for your JCB JS70 runs 385 pages and carries OEM #9803/6020, covering the hydraulic pump, traction motor, and engine control system end to end. Hydraulic schematics walk through pressure testing and cushion valve function, while the electrical layouts trace every wire back to its connector. The troubleshooting section runs deep, taking you through faults in the traction gearbox, recoil unit, and main control valve one step at a time on genuine factory logic. Torque the travel motor mounting hardware to 268-312 Nm (197-230 lbf ft), then work the hydraulic air bleeding procedure straight through. No more tearing into the undercarriage on a hunch. The file is fully bookmarked, so load it on a tablet, jump to the spec you need, and get the machine tracking straight again.
Complete the set for your JS70, Isuzu 4JB1 PAA-04
What's Inside This JCB JS70, Isuzu 4JB1 PAA-04 Manual
| System | Pages | Key Topics |
|---|
| Care & Safety | 14-19 | Safety Notices, General Safety, Operating Safety, Maintenance Safety |
| Body & Framework | 57-59 | Weights |
| Electrics | 60-93 | Torque Specifications, Technical Data, Battery Testing, Schematic Diagram, Layout, Engine Control |
| Schematics | 96-133 | Technical Data |
| Pressure Testing | 134-147 | |
| Hydraulic Pump | 148-164 | Function Chart |
| Control Valve | 165-200 | |
| Remote Control Valve Hand | 201-215 | |
| Hydraulic Rams | 216-259 | Multiple Valves, Cushion Valves |
| Rotary Coupling | 260-269 | |
| Slew Motor | 270-287 | |
| Transmission | 288-348 | Traction Motor/Reduction Gear, Traction Gearbox |
| Track and Running Gear | 349-383 | Removal and Replacement, Idler Wheel and Recoil Unit, Idler Wheel, Recoil Unit, Grease Cylinder, Drive Sprocket, Top Roller, Bottom Roller |
| Engine | 384-385 | Technical Data |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Travel Motor Mounting Torque | 268~312 Nm (197~230 lbf ft) | p. 4 |
| Hydraulic Pump Displacement Volume | 36 cm3/rev x 2 (2.196 in3/rev x 2) | p. 96 |
| Hydraulic Pump Working Pressure | 284.4 bar (4125 lbf/in2) | p. 96 |
| Hydraulic Return Filter Replacement Interval (100% breaker use) | Every 100 hrs | p. 24 |
| Hydraulic Suction Filter Cleaning Interval (100% breaker use) | Every 100 hrs | p. 24 |
| Fuel Hose (fuel tank - engine) Replacement Interval | Every 4000 Operating Hours or 2 Years | p. 27 |
| Fuel Hose (fuel filter - injection pump) Replacement Interval | Every 4000 Operating Hours or 2 Years | p. 27 |
| General O-rings, Seals and Gaskets Replacement | Renew whenever disturbed unless otherwise instructed | p. 19 |
