Part of the JCB Repair Manuals.
Getting your machine back to work starts here. This 694-page JCB T4F 444 (55kw) and T4i 444/448 Elec Engine Service Manual (OEM #9806/4300-5) breaks down every component from the bedplate to the rocker assemblies. Inside, you get full wiring diagrams to trace harness faults, complete fluid flow schematics, and a detailed troubleshooting section packed with Servicemaster electronic fault codes. Open to any chapter and find step-by-step teardown instructions for the variable geometry turbocharger, EGR actuator, and fuel injectors. Lock down the cylinder head to the crankcase in stages by pulling the bolts to 40 N-m first, then stepping up to 75 N-m for the second pass. Broken bolts and blown head gaskets kill profits. Download this bookmarked file straight to your tablet, jump right to the spec you need, and get that engine running right.
What's Inside This JCB JCB T4F 444 (55kw) Engine (4 Cyl), T4i 444 Elec Engine (4 Cyl), T4i 448 Elec Engine (4 Cyl) 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 | Identification Label, Engine |
| Operator Station | 33-38 | Safety Label/Chart, General Introduction |
| Engine Component Overview | 39-40 | Crankcase, Cylinder Head, Bedplate, Crankshaft, Camshaft, Engine Belt, Oil Filter, Air Filter, Crankcase Ventilation Filter, Valve, Connecting Rod, Piston, Manifold, Rocker and Fittings, Oil Sump, Timing Gear, Flywheel, Oil Pump, Oil Cooler, Alternator, Starter Motor, Sensor, Switch |
| Engine Assembly and Service | 40-340 | Crankcase, Cylinder Head, Bedplate, Crankshaft, Camshaft, Valve Train, Connecting Rod, Piston, Manifold, Rocker and Fittings, Timing Gear, Flywheel, Oil Sump, Oil Pump, Oil Cooler, Engine Mount, Alternator, Starter Motor, Sensors, Switches, Turbocharger, EGR, Air Intake |
| Fuel and Exhaust System | 341-468 | Tank, Filter, Water Separator, Injection, Fuel Pump, Exhaust |
| Cooling System | 469-506 | Cooling Pack, Expansion Tank, Pump, Thermostat, Inlet, Hose |
| Electrical System | 507-624 | Harness, Control Module, Electronic Diagnostic |
| Fasteners and Fixings | 625-640 | Screws, Bolts |
| Consumable Products | 641-666 | Oil, Fluids, Fuel |
| After Sales | 667-694 | Maintenance Schedules (Maintenance Intervals, Pre-Start Cold Checks, Service Points and Fluid Levels) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Rocker shaft fixing bolts torque | 24 Nm | p. 199 |
| Rocker shaft - oil feed pedestal fixing bolt torque | 24 Nm | p. 199 |
| Cylinder head to crankcase bolts - first stage torque | 40N·m | p. 90 |
| Cylinder head to crankcase bolts - second stage torque | 75N·m | p. 90 |
| High pressure pump type | Delphi DFP 4.2 | p. 346 |
| Injection pump fixing nuts torque | 24 Nm | p. 408 |
| Fuel lift pump type | Electrically operated | p. 346 |
| Fuel filter micron rating - Pre-filter | 5 micron | p. 346 |
| Fuel filter micron rating - Main filter | 2 micron | p. 346 |
| Injector clamp bolt torque | 28 Nm | p. 397 |
| Injector sleeve torque | 39 Nm | p. 397 |
| Starter motor electrical lead (Terminal 30) torque | 15 ± 3 Nm | p. 275 |
