This Service Manual (OEM #9803/5100-19) maps the 2005-2008 JCB 926, 930, 940, and 950 Rough Terrain Fork Lifts across all four variants: Synchro Shuttle gearbox, hydraulic lift and tilt rams, IP67 electrical system, and power steering. The 560 pages include full wiring schematics with circuit descriptions for both standard and IP67 machines, hydraulic schematics split by serial number break, standard torque tables, and step-by-step procedures across transmission, brakes, steering, and engine. Wheel nuts torque to 680 Nm; stake the pinion oil seal nut to 200 Nm before the axle goes back together. When a 940 is down, forum guesses won't get it running. Search by keyword, jump through bookmarks, and pull the right figure on the first try.
What's Inside This JCB 926, 930, 940, 950 Manual
| System | Pages | Key Topics |
|---|---|---|
| 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
Warning buzzer and park brake light come on once the machine warms up p. 500
Inspect the parking brake mechanism and pad thickness. Replace the brake pads if they are worn below the 3 mm (1/8 in) minimum thickness limit referenced on page 500. Verify the brake lever adjustment and check the electrical harness for heat-related shorts near the transmission housing.
Manual Section: Parking Brake Testing and Adjustment (Type 1, 2, 3 Installations)Transmission overheating under load, lacks pulling power in forward or reverse, or jumping out of gear p. 456
Drain the transmission oil and check for clutch material or emulsification. Verify the torque converter diameter is 279 mm as specified on page 431. Clean the suction strainer and refill the system with fresh fluid following the troubleshooting procedures on page 456.
Manual Section: Gearbox Fault FindingLoader arms lift slowly or fail to hold pressure when handling heavy pallets or materials p. 330
Measure the Main Relief Valve operating pressure at the test port. Adjust the valve to achieve exactly 220 bar as detailed on page 330. Drain and refill the 64 Litre hydraulic system (page 80) to rule out fluid contamination.
Manual Section: Loader Valves Testing and AdjustmentNo charge warning light stays illuminated on the dashboard or battery drains during continuous operation p. 284
Test the alternator output voltage and cable continuity using a multimeter. Remove the alternator housing and measure the brush length. Renew the brushes immediately if their length is less than 8 mm (0.3 in) according to the specifications on page 284.
Manual Section: Alternator Charging Circuit TestFrequently Asked Questions
How do I reset the parking brake warning on a JCB 950?
When the park brake warning light flags a fault, the manual's fix is to adjust the brake: reset the pad position and cable slack. On Type 1 installations that means tightening the brake pad retaining nuts to 6Nm (4.4 lbf ft) and the caliper bolts to 14Nm (10.3 lbf ft). Re-test the park brake afterward, as described on page G-18.
What are the replacement specifications for oil seals?
Fit new rod seals with seal tool 17-A; the size and position of pins 17-B follow the seal's diameter and radial width. On metric threaded rams, seat the seals the correct way round as shown in figures 19-A and 19-B on page E-93. Renew all seals and O-rings once disturbed, lubricate them with JCB Special Hydraulic fluid, and fit them clean.
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.
Document Quality
This document is a high-quality scanned PDF with an optical character recognition (OCR) layer, allowing you to search and copy the full text content. The text is crisp and consistently easy to read throughout all pages. Diagrams and illustrations are clear raster images, with all labels and details easily legible at various zoom levels. The pages are clean with no scan artifacts or skewing, and several pages are intentionally left blank for notes or as filler.
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