JCB 926, 930, 940 Rough Terrain Fork Lift 2004 Service & Repair Manual (P/N 9803/5100-16)

• JCB service publication No. 9803/5100-16 (copyright 2004) covers the 926 from machine serial 602000, the 930 from 607700, and the 940. The 12-file PDF set identifies 2WD and 4WD differences where applicable.

• Mast and carriage repair covers chain wear inspection and adjustment, carriage removal and setting, side-shift wear pads, and mast removal/disassembly for standard, early and later North American side-shift, and Olofsson configurations.

• Hydraulic diagnosis and overhaul includes circuit operation, pump removal and disassembly, including the JCB 444 engine installation, loader-valve testing and adjustment, deration-valve service, and lift, tilt, free-lift, and side-shift ram removal, resealing, and adjustment. Attachment coverage adds quick-release couplings, swivel couplings, and hose-reel service.

• Syncro Shuttle drivetrain work covers SS600 transmission fault finding and teardown, torque-converter removal and alignment, the PD70 front axle, S55 2WD rear axle, SD55 4WD rear axle, and mechanical 4WD unit repair, supported by pressure/flow data and component cutaways.

• Electrical troubleshooting provides fuse and relay tables, non-IP67 and IP67 circuits, multimeter and charging/starting tests, wiring-harness repair, alternator and starter overhaul, and mainframe/cab-panel interconnection drawings, including R-series and Dieselmax transmission-dump variants.

• Brake and steering procedures address single- and dual-pedal service brakes, three serial-specific parking-brake installations, 940 brake-vacuum tests and servo-exhauster replacement, plus steering-pump, Danfoss hydraulic steering-unit, and priority-valve disassembly and assembly.

PDF file breakdown: master cover file, 2 pages; Section 1, 38; Section 2, 20; Section 3, 94; Section A, 12; Section B, 42; Section C, 96; Section E, 98; Section F, 46; Section G, 36; Section H, 34; Section K, 12. Total: 530 PDF pages.

JCB designed this publication for distributor service engineers who have received or are receiving JCB Technical Training. It assumes sound workshop practice, safety knowledge, and experience maintaining and repairing hydraulic equipment, making it best suited to trained technicians with appropriate shop tools rather than first-time DIY repair work.

Serial-Specific System Coverage

Configuration matching runs through the repair data, not just the opening model list. Electrical information separates non-IP67 926/930 machines from IP67 production at serials 602902 and 608656; all 940 machines use IP67 electrics. Later all-model diagrams distinguish R-series engine machines at serials 823756-825399 and Dieselmax machines from 825400, with separate transmission-dump pedal and switch schematics.

Steering specifications change across 926/930 breaks at 602750/608300 and 602798/608419, including different control units for 2WD and 4WD. Parking-brake coverage identifies Type 1, Type 2, and Type 3 installations, with the last applying to all models from serial 822421. On the 926/930, the hydraulic section separates early dual-pump steering from later priority-valve systems and documents the revised lift-hose and loader-valve arrangement introduced at 602874/608590.

Maintenance, Test Data, and Workshop References

Separate maintenance schedules are provided for A/R-series and Dieselmax machines. They cover pre-start checks, first-service items, recurring service intervals, lubrication points, fluids and capacities, coolant mixtures, fuel-filter service and bleeding, hydraulic tank/filter work, and transmission and axle maintenance.

Reference tables include zinc/yellow-plated and Dacromet fastener torques under the applicable thread conditions; BSP and SAE O-ring face-seal connections; Torque Stop hoses; component-specific torque settings; hydraulic pressure and flow tests; fluid capacities; electrical checks; adjustment data; and inspection limits. The manual also supplies JCB part-numbered sealants and retaining compounds plus standardized hydraulic pressure/flow color codes.

The numerical special-tool index links each tool to its section. Examples include the 892/00253 hydraulic circuit pressure test kit, 892/00334 ram seal fitting tool, 892/01027 piston seal assembly tool, 892/00916 clutch-pack spring compressor, and 892/00921 torque-converter alignment bar. Illustrated references include serial-specific non-IP67/IP67 electrical schematics, Mainframe Harness and Cab Panel Harness drawings, Neutral and Steering Circuit, Lift Operation and Free Lift Mast, and front/rear axle cutaways.

Engine Scope and Repair Cautions

Engine coverage identifies AA/AR A-series, RE R-series, and SA naturally aspirated Dieselmax builds, with specifications, serial-number decoding, routine service, and low/high idle checks. Full internal engine repair is outside this set. The manual instead references separate engine publications 9806/0100 (AA), 9806/2140 (AR), 9806/2250 (RE), and 9806/3000 (SA Dieselmax); those publications are not included.

Later metric-thread hydraulic rams use different seals and a defined seal orientation; fitting the wrong seals or reversing them can damage the sealing system. During transmission installation, an incorrectly seated torque converter can damage the gearbox oil pump when the engine starts.

Safety coverage specifically addresses secure support for a raised mast or carriage, residual hydraulic pressure, and electrical isolation during repair work.