These 723 pages cover factory-level teardown, rebuild, and troubleshooting for the JCB TM320 and TM310 wheeled loader (OEM #9813/4700-1). Hydraulic schematic circuits, full electrical wiring diagrams, and Servicemaster electronic fault code charts are all here so you can diagnose network errors without guesswork. The powershift transmission and engine chapters walk through step-by-step repair procedures from the main hydraulic pump and steer rams to the articulated joint. Cold inlet valve tip clearance runs 0.15–0.20 mm; front and rear wheel nuts torque to 680 Nm. Download the bookmarked file to your tablet, search for your exact spec, and get your machine back in service.
What's Inside This JCB TM320, TM310 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-43 | About This Manual, Identifying Your Machine, Torque Settings, Hydraulic Connections, Service Tools, Service Consumables, Terms and Definitions |
| Care and Safety | 44-63 | Safety Notices, Safety Check List, Safety Labels, Part Numbers and Descriptions |
| Body and Framework | 136-233 | Technical Data, Basic Operation, Fault Finding, Service Procedures, Cab, Boom, Articulated Joint, Load Moment Indicator |
| Electrics | 234-299 | Technical Data, Schematic Circuits, Service Procedures, Battery, Alternator, Starter Motor, Harness Data |
| Hydraulics | 300-407 | Technical Data, Basic Operation, Circuit Descriptions, Schematic Circuits, Service Procedures, Hand Control Valve, Main Hydraulic Pump, Control Valve Block |
| Transmission | 408-515 | Technical Data, Basic Operation, Systems Description, Electrical Connections, Fault Finding, Powershift Gearbox, Front Axle, Rear Axle |
| Brakes | 516-537 | Service Brakes System, Brake Valve, Priority Valve, Park Brake, Service Procedures |
| Steering | 538-551 | Service Procedures, Hydraulic Pressure Tests, Steer Rams, Hydraulic Steer Unit, Steering Manifold |
| Engine | 552-617 | JCB Dieselmax and Ecomax, Cooling Pack, Inlet Manifold Heater System, Air Filter Vacuum Switch, Air Filter Housing and Ducts, Starter Motor, Coolant Expansion Tank, Fuel Cooler |
| Network Systems | 618-723 | Electronic Monitoring System, Electronic Fault Codes, Servicemaster, Servicemaster Tools, JCB 4.4L Tier 4 Sj Diagnostics Tool - User Guide |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel Nut Torque - Front | 680 Nm (500 lbf ft) | p. 132 |
| Wheel Nut Torque - Rear | 680 Nm (500 lbf ft) | p. 132 |
| Valve Tip Clearances (measured cold) - Inlet | 0.15 mm to 0.20 mm (0.006 to 0.008in) | p. 556 |
| Valve Tip Clearances (measured cold) - Exhaust | 0.43 mm to 0.50 mm (0.017 in to 0.020 in) | p. 556 |
| Engine Oil Drain Plug Torque | 40-60Nm | p. 112 |
| Engine Oil Filter Canister Installation | hand tight only | p. 112 |
| UNF Grade 'S' Fasteners (Condition 1) - 1/4 inch bolt torque | 11.2 Nm | p. 14 |
| Metric Grade 8.8 Fasteners (Condition 1) - M5 bolt torque | 5.8 Nm | p. 14 |
| SAE Connections Torque Setting - SAE Tube Size 12 (1 1/16-12 thread) | 190.0 - 210.0 Nm | p. 17 |
| Diesel Fuel Tank Capacity | 160 Litres | p. 83 |
| Hydraulic System Capacity | 135 Litres | p. 83 |
| Wheel Nut Torque | 680 Nm | p. 132 |
JCB TM320, TM310 Common Problems This Manual Covers
JCB TM320 engine fails to start or cranks slowly without firing in cold weather p. 122
Replace the main fuel filter element if you suspect water contamination or clogging. Torque the filter flange to exactly 30Nm as specified for TM320 models on page 122. Bleed the low-pressure fuel lines completely to remove all trapped air before attempting to crank the engine again.
Manual Section: EngineLoud ticking valve train noise after cold start with gradual loss of engine power p. 556
Remove the valve cover and measure clearances cold using the technical specifications on page 556. Adjust the inlet valves to 0.15 mm to 0.20 mm and the exhaust valves to 0.43 mm to 0.50 mm. Inspect the valve stem seals for excessive wear while the cover is off.
Manual Section: EngineBattery warning light stays illuminated and electrical system drains quickly under heavy workload p. 238
Test the charging circuit at the battery terminals while the engine is running. Verify the alternator is producing its nominal output of 95 Amp as listed on page 238. Inspect the drive belt tension and replace the belt if you find cracks or glazing on the ribs.
Manual Section: ElectricsMachine vibrates excessively at high speeds and steering wanders erratically across the road surface p. 132
Inspect all wheel rims for damage or elongation around the stud holes. Verify the wheel nuts are tightened to the correct 680 Nm torque specification provided on page 132. Lift the axle to check for worn kingpins or loose steering tie rod ends before returning to service.
Manual Section: TransmissionFrequently Asked Questions
How do I reset the JCB TM320 DEF system fault?
Connect a laptop running JCB Servicemaster to the machine's CANbus. The tool reads active and logged fault codes, enables fault-finding options, and lets you erase codes from ECU memory once the underlying fault is rectified (Page 688).
How do I reset a JCB TM320 transmission fault code?
Connect a laptop with JCB Servicemaster to the CANbus port. Servicemaster identifies the specific transmission fault and provides the option to erase it from ECU memory after you have addressed the root cause.
What do JCB TM320 error codes mean?
The Fault Code List section (Page 639) organizes codes by system across multiple tables: Engine, DCU, Transmission, Hydraulics, Low Spec Display, and Livelink. Each table maps a code to a description. For example, P046D-2F is an Engine Error and P007D-24 is an intake manifold temperature sensor fault.
What do I get after purchasing this JCB TM320 manual?
Immediate download of the complete 723-page searchable Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this manual?
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 TM320 manual?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
Document Quality
This is a native digital PDF document, allowing you to search and copy text throughout. The text is crisp and consistently easy to read on every page. Diagrams and illustrations are sharp, with all labels clearly legible, ensuring details are easily discernible. Pages are clean and free of any scan artifacts, stains, or skewed content. Please note that there are numerous pages explicitly marked as "Page left intentionally blank" throughout the manual.
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