Part of the JCB Repair Manuals.
This JCB Service Manual covers the 926, 930, 940, and 950 rough terrain fork lifts, publication number 9803/5100-19, built between 2005 and 2008. Its 560 pages carry the full workshop coverage for these machines, which run A Series, R Series, and JCB Dieselmax engines.The manual is organized by system: general information and torque settings, care and safety, attachments, body and framework, electrics, hydraulics, transmission, brakes, steering, and engine. Technical data tables give the fluid capacities, relief valve pressures, and torque figures you need for each job.With it you can torque the wheel nuts, service the mast and carriage, overhaul the hydraulic pump, renew the brake pads, and trace electrical faults through the wiring section on your 926, 930, 940, or 950.
What's Inside This JCB 926, 930, 940, 950 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-47 | Introduction, Identifying Your Machine, Standard Torque Settings, Service Tools, Service Consumables, Terms and Definitions, Safety Notices, Safety Check List, Safety Labels |
| Care and Safety | 48-67 | Safety Notices (Important Information, Operator Manual, Safety Warnings), Safety Check List (Safety - Yours and Others, Operating Safety, Maintenance Safety) |
| Attachments | 162-179 | Service Procedures (Introduction, Attachments for Your Machine, Connecting/Disconnecting Hydraulic Hoses, Connecting the Hydraulic Hoses, Disconnecting the Hydraulic Hoses, Quick Release Couplings, Work Platforms) |
| Body and Framework | 180-225 | Service Procedures (Rivet Nuts, Fitting Procedure, Slide Hammer Kit, Glazing, Direct Glazing) |
| Electrics | 226-329 | Technical Data (IP67 Electrics, Fuses and Relays, Fuses, Link Box Fuses, Relays) |
| Hydraulics | 330-429 | Hydraulic Rams, Loader Valves, Hydraulic Pump, Circuit Description, Schematic Symbols, Testing and Adjustment |
| Transmission | 430-477 | Technical Data (Synchro Shuttle Gearbox, Unit Identification, Front Axle, Rear Axle - 2WD Machines, Rear Axle - 4WD Machines, Tyre Pressures) |
| Brakes | 478-515 | Parking Brake, Service Brakes, Brake Pedal Adjustment, Renewing the Brake Pads, Removal and Replacement, Torque Settings |
| Steering | 516-551 | Technical Data (, : 930, 930, 940, 950), Basic System Operation (, Circuit Description (Power Steering, Flow Regulating Valve) |
| Engine | 552-560 | Technical Data (Machines with a Series Engines, Specification, Unit Identification, Machines with R Series Engines, Machines with Jcb Dieselmax Engines), Basic System Operation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel Nut Torque | 680 Nm (500 lbf ft) | p. 139 |
| Mast Tilt Ram Bolts (2-C) | 118 Nm (12 kgf m, 87 lbf ft) | p. 208 |
| Mast Pivot Pins Bolts (2-F) | 49 Nm (5 kgf m, 36 lbf ft) | p. 208 |
| Axle Drain/Fill Plugs | 79 Nm (60 lbf ft) | p. 135 |
| Pinion Oil Seal Stake Nut | 200 Nm (148 lbf ft; 20.4 kgf m) | p. 454 |
| Carriage Roller Bearings Adjustment Bolt (2-1) | 407 Nm (42 kgf m, 300 lbf ft) | p. 197 |
| General Oil Seal Replacement | Renew whenever disturbed unless otherwise instructed | p. 57 |
| Hydraulic Pump Seals Replacement | Renew all seals and 'O' rings using JCB Special Hydraulic fluid as a lubricant | p. 366 |
| General Gasket Replacement | Renew whenever disturbed unless otherwise instructed | p. 57 |
| Hydraulic Pump Flange Spigot Gasket Application | Apply a 2 - 3mm bead of JCB Multigasket | p. 369 |
| Hydraulic Pump Bearing Block Bores Wear Limit | Renew complete pump if grey PTFE is worn through so that bronze base is visible | p. 366 |
| Alternator Brushes Wear Limit | Renew brushes if length is less than 8 mm (0.3 in) | p. 284 |
JCB 926, 930, 940, 950 Common Problems This Manual Covers
Park brake light and buzzer when warm
Owners report the warning buzzer and park brake light coming on once the machine heats up, usually a park brake switch, wiring, or interlock fault. The Brakes section covers the parking brake and its adjustment.
Manual Section: Brakes p. 478Weak or leaking hydraulics
Slow lift or leaks often mean worn seals, low or contaminated oil, or a tired pump. The Hydraulics section covers the pump, loader valves, rams, and testing and adjustment.
Manual Section: Hydraulics p. 330Oil leaks from seals and gaskets
Persistent leaks from the driveline or hydraulic components point to worn oil seals and gaskets that are renewed as standard service items. The Hydraulics section covers pump seal and ram seal replacement.
Manual Section: Hydraulics p. 330Transmission or drive fault
A drive problem on the Synchro Shuttle gearbox needs repair-level diagnosis. The Transmission section provides technical data for the gearbox, front and rear axles, and tyre pressures.
Manual Section: Transmission p. 430Mast and carriage wear
Play in the mast or fork carriage develops with hours and load. The Body and Framework section covers the mast tilt ram, pivot pins, and carriage roller bearing adjustment with their torque figures.
Manual Section: Body and Framework p. 180Steering feels heavy or wanders
Heavy or drifting steering can come from the flow regulating valve or power steering circuit. The Steering section covers the circuit description and the relief valve pressure of 120 bar.
Manual Section: Steering p. 516Worn park brake pads
The parking brake loses holding power as its pads wear. The Brakes section gives the pad renewal thickness and the removal and replacement procedure.
Manual Section: Brakes p. 478Frequently Asked Questions
Which models does this manual cover?
It covers the JCB 926, 930, 940, and 950 rough terrain fork lifts, publication 9803/5100-19, for machines built between 2005 and 2008.
What is the hydraulic system pressure?
The Hydraulics section lists the main relief valve operating pressure of 220 bar and a pump flow of 55 litres/min at that pressure for these fork lifts. p. 330
Does it cover the engines?
Yes. The Engine section gives technical data for machines with A Series, R Series, and JCB Dieselmax engines, including the Dieselmax idle speed of 910 rev/min. p. 552
Does it include wiring and electrical diagnostics?
Yes. The Electrics section covers the IP67 electrics, fuses and relays, link box fuses, and relay locations for tracing faults on these machines. p. 226
How quickly can I access this manual after buying?
Immediate download of the complete 560-page searchable Service Manual. Open it on any device: laptop at your desk or phone in the field.
Are there any print restrictions on this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Are there wiring harness diagrams in this JCB 926, 930, 940, 950 manual?
Included. The JCB 926, 930, 940, 950 Service Manual covers complete wiring harness diagrams, electrical circuits, and connector pinouts.
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