Part of the JCB Repair Manuals.
Need the exact tear-down steps for your JCB Wheeled Loading Shovel? This 747-page JCB 435S service manual PDF (OEM #9803/9420-3) also covers the 434S variant, detailing every factory procedure from the engine to the axles. Inside, you get complete wiring diagrams for Tier 4 systems, detailed hydraulic schematics covering both Rexroth and Parker valve setups, and a comprehensive troubleshooting guide for the powershift transmission. Open to the brakes section for full flow charts and step-by-step rebuild procedures for the park brake and system accumulators. Verify the brake system low-pressure warning activates at exactly 105 bar, then confirm your tandem pump mounting bolts are fastened to 130 Nm. Stop throwing expensive parts at an unknown fault code. Grab this bookmarked digital reference, search for your spec, and get your loader back to work.
Complete the set for your 434S, 435S, Wheeled Loading Shovel 434S/435S…
- Operator Manual: JCB 426E, 434S, 436E, 456E Wheeled Loader Operator Manual
- Operator Manual: JCB 427, 435S, 437 Wheeled Loader Operator Manual
- Operator Manual: JCB 427, 435S, 437 Loader Operator Manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-45 | Introduction, Identifying Your Machine (434S, 435S), Torque Settings (Zinc Plated Fasteners and Dacromet Fasteners, Hydraulic Connections) |
| Care and Safety | 46-63 | Safety Notices (Safety Check List, Safety - Yours and Others, Operating Safety, Maintenance Safety) |
| Attachments | 64-71 | Optional Attachments, Connecting/Disconnecting Hydraulic Hoses |
| Body and Framework | 72-139 | Technical Data (Air Conditioning Option), Fault Finding (Air Conditioning), Service Procedures (Rivet Nuts, Air Conditioning), Air Conditioning (Components) |
| Electrics | 140-275 | Technical Data, Service Procedures (Using a Multimeter, Battery, Alternator, Starter Motor, Wire and Harness Number Identification, Wiring Harness Repair) |
| Hydraulics | 276-419 | Technical Data (Rexroth Valve Machines, Parker Valve Machines), Basic Operation (Introduction to Hydraulic Schematic Symbols) |
| Transmission | 420-675 | Technical Data (Transmission, Axles, Tyres), Axles (Front Axle, Rear Axle, Hub and Driveshaft, Drive Head, Crown Wheel and Pinion, Limited Slip Differential Unit, Zf Axles) |
| Brakes | 676-701 | Technical Data (Brakes), Brake Circuits (434S Machines, 435S Machines), Service Procedures (Service Brakes, System Accumulators, Park Brake, Park Brake Testing) |
| Hydraulic Steering | 702-723 | Technical Data, Circuit Descriptions (Steering Operations), Emergency Steering (System Description), Hydraulic Steering Unit (Dismantling and Assembly) |
| Engine | 724-747 | Technical Data (434S From Serial No. 124400, 435S), Troubleshooting (Possible Faults), Engine and Transmission (Removal and Installation), Sump Drain Plug (435S Machines) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Brake system low pressure warning activation | 105 bar | p. 680 |
| Tandem Pump mounting bolts torque | 130 Nm | p. 380 |
| Torque Converter Dia. | 300mm (11 in) | p. 424 |
| Hydraulic Control Unit pressure regulator socket head screws torque | 5.5 Nm | p. 605 |
| Hydraulic Steering Unit set screw torque | 11 Nm (8.1 lbf ft) | p. 713 |
| Hydraulic Steering Unit cap screws torque | 31 Nm (22.9 lbf ft) | p. 716 |
| 434S | ||
| Accumulator Capacity per circuit, 434S | 0.75 litre | p. 680 |
| Torque Multiplication at Stall | 3.01:1 | p. 424 |
| Hydraulic RV stall (arms fully lowered) | +0/-10 of flight | p. 417 |
| 435S | ||
| Accumulator Capacity per circuit, 435S | 1.75 litre | p. 680 |
| Hydraulic RV stall (arms fully lowered) | +0/-10 of flight | p. 419 |
| 434S Rexroth Valve Machines | ||
| Hydraulic tank capacity (Rexroth Valve Machines) | 181 Litres | p. 281 |
