This JCB TM310 / TM320 Service Manual (OEM #9803/9520-9) runs 690 pages and stays on one job: holding your 2004–2012 Telescopic Handler at factory spec across boom, transmission, brakes, steering, and engine. The wiring section covers full circuit diagrams, fuse and relay layouts, and harness repair steps. Hydraulic coverage adds flow and pressure test data for the main pump and the control valve block. Troubleshooting also covers error code tables and CANbus fault diagnostics through the ShiftMaster and Servicemaster tools. Practical numbers are here too: front and rear wheel nuts at 680 Nm (500 lbf ft), and an inner boom shim if lower clearance drops below 15 mm. With the machine down, you want the factory answer first time. Bookmarked by section, searchable on any device.
What's Inside This JCB TM310–TM320 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | - | Machine Model and Serial Number, Torque Settings, Service Tools, Service Consumables, Terms and Definitions |
| Care and Safety | - | Safety Notices, General Safety, Operating Safety, Maintenance Safety, Safety Labels |
| Routine Maintenance | - | Service Schedules, Fluids, Lubricants and Capacities, Prepare the Machine for Maintenance, Checking for Damage, Greasing, Electrical System, Engine |
| Section B - Body and Framework | - | Air Conditioning Technical Data, Load Moment Indicator Basic Operation, Rivet Nuts Service Procedures, Boom Removal and Replacement, Cab Removal and Replacement |
| Section C - Electrics | - | General Electrical Data, Fuses and Relays, Schematic Circuits, Using a Multimeter, Battery Service Procedures, Wiring Harness Repair |
| Section E - Hydraulics | - | Main Hydraulic Pump Technical Data, Control Valve Block Basic Operation, Circuit Descriptions, Flow and Pressure Tests, Hydraulic Rams Removal and Replacement |
| Section F - Transmission | - | Tyre Pressures and Sizes, Powershift Gearboxes Technical Data, Torque Converter Basic Operation, Electrical Connections, Fault Finding, Front Axle Removal and Replacement |
| Section G - Brakes | - | Park Brake Gearbox Integral, Brake Pump Removal and Replacement, Brake Valve Removal and Replacement, Bleeding the Braking System |
| Section H - Steering | - | Bleeding the System, Hydraulic Pressure Tests, Steer Rams Removal and Replacement, Hydraulic Steer Unit Removal and Replacement, Steering Manifold Removal and Replacement |
| Section K - Engine | - | Basic Engine Data, Silencer Removal and Replacement, Cooling Pack Removal and Replacement, Engine ECU Circuit Descriptions, Engine Installation, Engine Assembly |
| Section M - Network Systems | - | CANbus Communications System, Electronic Monitoring System, Electronic Fault Codes, Servicemaster Tools, JCB 4.4L Tier 3 Se Diagnostics Tool, ShiftMaster Diagnostics 2.3 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nut torque (Front) | 680 Nm (500 lbf ft) | p. 130 |
| Wheel nut torque (Rear) | 680 Nm (500 lbf ft) | p. 130 |
| Lower inside face of outer boom to underside of inner boom Standard | 17 mm | p. 184 |
| Lower inside face of outer boom to underside of inner boom (add shims if below) | 15 mm (0.59 in) | p. 184 |
| Articulated joint vertical pivot bushes replacement criteria | Renew if any play is detected | p. 193 |
| Articulated joint nominal dimension | 202 mm (7.953 in) | p. 194 |
| BSP Adaptor Torque (1/4 in) | 18.0 Nm | p. 16 |
| BSP Adaptor Torque (3/8 in) | 31.0 Nm | p. 16 |
| Hydraulic filter cap torque | 40 Nm (29.5 lbf ft) | p. 372 |
| Alternator nominal output | 95 Amp | p. 237 |
| Alternator mounting bolts torque | 47 Nm (4.8 kgf m 34.7 lbf ft) | p. 291 |
| Boom Lift Cycle Time (unladen) | 6.0 Seconds | p. 340 |
JCB TM310–TM320 Series Common Problems This Manual Covers
JCB TM310 headstock center eye pivot area develops play or visible cracking under load p. 193
Inspect the articulated joint pivot bushes for any detectable movement and renew them at once if there is play (page 193). Measure joint clearance against the nominal 202 mm (7.953 in) dimension on page 194, aiming for 0.1 to 0.3 mm. On reassembly, torque the articulated joint nuts and bolts to 670 Nm (494 lbf ft) per page 195.
Manual Section: Section B - Body and FrameworkBoom inner section loose or wandering during extension, visible rocking in wear pads p. 184
Check the vertical and side clearances between the inner and outer boom sections; the maximum allowed is 2.0 mm in either plane (page 184). Confirm the lower face gap holds the standard 17 mm and shim up if it falls below 15 mm (0.59 in). Torque the wear pad retaining bolts to 60 Nm (44 lbf ft) on reassembly per page 189.
Manual Section: Section B - Body and FrameworkHydraulic boom lifts too slowly or bucket and attachment response is weak and sluggish p. 339
Measure main system pressure at the test point; target 240 bar (page 361), with pump cut-off at 250 bar (page 339). Time an unladen boom lift, which should finish in 6.0 seconds (page 340). If pressure or cycle time falls short, look for contaminated fluid and a blocked filter before condemning the pump. Run the full flow and pressure tests in Section E - Hydraulics.
Manual Section: Section E - HydraulicsPowershift gearbox fails to engage any gear or machine does not drive p. 447
Test the control solenoid coils on the PS766 gearbox; each should read 7.5 Ohm at 20°C (page 447). If the coils pass, work through Powershift Gearbox Fault Finding in Section F, which covers lacks power, failure to engage, and overheating. Check the gearbox oil level, look for water contamination, and verify CANbus communication if every gear fails at once.
Manual Section: Powershift Gearbox Fault FindingLoad Moment Indicator display shows fault codes or system not functioning correctly p. 425
Start at the 12V supply to the LMI display box (page 237). If power is present but faults remain, verify the angle sensor output: it should read 0.7V ±0.4V at the fully lowered boom position with a 0-5V supply (page 425). From there, work through the Load Moment Indicator Fault Finding procedures covering display calibration, transducer signal faults, and harness continuity checks.
Manual Section: Load Moment Indicator (LMI) Fault FindingEngine ECU warning lights active with no clear cause, machine runs erratically
Connect to the diagnostic system and pull the active fault codes. Look first for CANbus communication failures, since these suppress other codes and appear in Section M - Network Systems. Verify the engine oil pressure sensor circuit, where lubricating oil pressure is nominal at 4.3 bar (62 lb/in²), and inspect the wiring harness at the key engine ECU pins before replacing any sensor.
Manual Section: Electronic Fault Codes (Engine ECU)Frequently Asked Questions
How do I reset a JCB TM310/TM310S/TM310WM/TM320 error code?
For Load Moment Indicator (LMI) fault codes, the audible alarm and fault code will cancel after 10 seconds, and the LEDs will flash continuously. To show the fault code for a further 10 seconds, press and release button 3-A. Alternatively, if any fault codes are displayed, turn the Ignition key switch to OFF and then ON again. For logged fault codes in the ECU memory, use the Servicemaster diagnostics tool to erase them by clicking the "Erase Fault Codes" button.
What is the torque spec for the wheel nuts on a JCB TM310/TM320?
Both front and rear wheel nuts on a JCB TM310/TM320 torque to 680 Nm (500 lbf ft). Recheck them every two hours on new machines, or after any wheel removal, until the readings hold steady.
How do I calibrate the transmission on a JCB TM310S?
Calibrating the transmission on a JCB TM310S runs through the ShiftMaster Diagnostics tool, part of the JCB Service Master suite. It lets you view and update the current setup data by sending setup files to the gearbox ECU.
How quickly can I access this manual after buying?
This is a 690-page searchable PDF ready for immediate download. It works on any device, so you can pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print this manual?
Yes. The PDF carries no DRM restrictions, so print any page or section you need for the shop. It works with any standard printer.
Are there wiring harness diagrams in this JCB TM310–TM320 Series manual?
Yes, this JCB TM310–TM320 Series Service Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text throughout is crisp and easy to read, with no blurriness or fading. Diagrams and illustrations are primarily sharp line drawings, and all labels are clearly readable. Pages are clean with no scan artifacts, stains, or skewed content. There are several dedicated "Notes" pages and "Page left intentionally blank" pages included as filler.
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