Part of the JCB Repair Manuals.
Need the exact factory numbers to rebuild your diesel? This 534-page JCB T2/3 Mech Engine 4 Cyl Service Manual PDF (OEM #9806/7050) covers everything to get your powerplant back to factory condition. Inside, you get complete engine teardown procedures, electrical schematics with wire number identification, and a dedicated fault-finding section for battery and relay diagnostics. Open the file to find exploded views of the fuel injection pump, timing gear assemblies, and cooling pack configurations. Set your cold inlet valve clearances to 0.19-0.27mm and apply the full five-stage cylinder head torque sequence starting at 40 N·m as specified on page 88. Engine rebuilds leave zero room for guesswork. Download this bookmarked file straight to your shop tablet, jump right to the spec, and get the machine running right.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Machine | 5-26 | Introduction (General, Product Compliance, Intended Use), Safety (- Yours and Others, Warnings, Maintenance Safety, Operating Safety, Worksite Safety, Risk Assessment, General) |
| Body and Framework | 27-32 | Contents (Identification Label, Engine), Notes, Identification Label, Introduction, Engine Data Labels, Example of the Engine Identification Number |
| Operator Station | 33-38 | Contents (Safety Label/Chart, General), Notes, Safety Label/Chart, General, Introduction |
| Engine Technical Data | 39 | Acronyms Glossary (Crankcase Ventilation, Direct Current, Dial Test Indicator, Engine Control Module, Engine Shut-Off Solenoid, Power Take-Off), Engine Overview (Crankcase, Cylinder Head, Bedplate, Crankshaft, Camshaft, Engine Belt) |
| Engine Specifications – Internal Components | 39 | Crankcase (Cylinder Bore, Main Bearing Bolts Torque, Surface Finish, Main Bearing Bore, Camshaft Bore), Cylinder Head (Distortion, Valve Recess Depth, Valve Seat Angle, Cylinder Head Bolts Torque, Cylinder Head Gasket), Bedplate (Main Bearing Bolts, Bedplate Peripheral Bolts), Connecting Rod (Big-End Bearing, Technical Data), Piston (Piston Ring, Valve (Technical Data, Component Identification) |
| Engine Components – Service Procedures | 40-316 | Oil Sump, Timing Gear, Flywheel, Oil Pump, Mount, Oil Cooler, Alternator, Starter Motor, Sensor, Solenoid, Switch, Oil Filter (Check Level, Remove and Install), Air Filter (Check Condition, Crankcase Ventilation Filter, Valve (Adjust, Connecting Rod (Remove and Install, Disassemble and Assemble), Piston (Disassemble and Assemble), Manifold, Rocker and Fittings |
| Air Intake System | 40-316 | Air Filter (Introduction, Health and Safety, Check Condition, Remove and Install), Crankcase Ventilation Filter (Introduction, Component Identification, Operation), Manifold |
| Fuel and Exhaust System | 317-402 | Acronyms Glossary, Tank, Fuel Filter, Filter Element, Fuel Lift Pump, High Pressure Fuel Pump (Delphi Dfp 210/310), Turbocharger, Fuel Bleeding Procedure |
| Cooling System | 403-442 | Acronyms Glossary, Cooling Pack, Radiator, Expansion Tank, Pump, Hydraulic Diagrams |
| Electrical System | 443-468 | Schematic Circuit, Wiring Harness, Engine Electrics, Introduction, Health and Safety (Arc Welding), Fault-Finding, Battery Fault Table |
| Fasteners and Fixings | 469-484 | General, Screws, Bolts |
| Consumable Products | 485-510 | Acronyms Glossary, Oil, Refrigerant |
| After Sales | 511-534 | Acronyms Glossary, Maintenance Schedules (General, Maintenance Intervals, Pre-Start Cold Checks, Service Points and Fluid Levels) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head to crankcase bolts - first stage torque | 40N·m | p. 88 |
| Cylinder head to crankcase bolts - second stage torque | 75N·m | p. 88 |
| Main bearing bolts torque - First stage | 50N·m | p. 80 |
| Main bearing bolts torque - Second stage | 115N·m | p. 80 |
| Valve Clearances (measured cold) - Inlet | 0.19–0.27mm | p. 50 |
| Valve Clearances (measured cold) - Exhaust | 0.56–0.64mm | p. 50 |
| Fuel filter restriction - maximum pressure drop (For pressure filter) | 0.65bar (9.4psi) | p. 322 |
| Fuel filter restriction - maximum pressure drop (For suction filter) | 0.27bar (3.9psi) | p. 322 |
| Fuel lift pump type | Mechanical diaphragm | p. 322 |
| Fuel lift pump operating pressure | 0.8bar (11.6psi) | p. 373 |
| High pressure pump type | Delphi DFP 210/310 | p. 322 |
| High pressure fuel pump drive shaft nut torque (DP210/310) - Stage 2 | 90 Nm | p. 88 |
