This is the JCB service manual (publication 9803/3250) for the 3C, 3CX, 3D and 4C excavator loader range, including the 3CX Turbo Sitemaster, 4C Turbo, 4CN and the 1400B, 1550B and 1700B variants built from machine serial number 290000. It covers machines fitted with the Leyland 4/98 and Perkins 4.236 and T4.236 engines.
Across 458 pages it works through every major system: hydraulics, attachments, engine, transmission and shuttle reverser, axles, brakes, hydraulic steering and electrics, plus service schedules, lubricant capacities and torque settings. You get technical data, wear tolerances, pressure figures and step by step repair procedures written for JCB service engineers.
Use it to diagnose a weak or drifting hydraulic system, rebuild the Hamworthy pump, service the shuttle reverser, set relief valve pressures or trace a charging fault. The PDF has a text layer and bookmarks, so you can search it and jump straight to the section you need.
What's Inside This JCB Excavator-Loader Range Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-17 | Introduction, Lubricants and Capacities, Torque Settings, Service Schedule, Excavator Greasing |
| Hydraulics | 18-162 | Technical Data (Pump, Main Relief Valve Pressures to Machine No. 306000, Main Relief Valve Pressures From Machine No. 306001 to 310999, Main Relief Valve Pressures From Machine No. 311000) |
| Attachments | 163-189 | Machine Neutral Circuit with Roadbreaker to M/C No. 295695, Machine Neutral Circuit with Roadbreaker From M/C No. 295696, Machine Neutral Circuit with Seventh Spool |
| Body & Framework | 190-210 | Glass Doors & Frameless Windows, Cab Heater Air Filter, In Cab Boom/Slew Lock, Boom/Slew Lock Master Cylinder, Boom/Slew Lock Slave Cylinder, Slew Actuator Operation |
| Engine | 211-232 | Technical Data, Engine Oil & Filter, Fuel System, Cooling System, Fan Belt, Air Filter |
| Transmission | 233-320 | Technical Data, Towing Procedure, Shuttle Reverser Maintenance, Shuttle Reverser Operation, Shuttle Reverser Components, Shuttle Reverser Testing and Fault Finding |
| Axles | 321-374 | Technical Data (Drive Axle - Rear, Drive Axle - Front, Steer Axle, Tyre Pressures), Drive Axle Oil, Crownwheel Assembly, Drive Axle - Rear, Rigid Drive Axle |
| Brakes | 375-384 | Technical Data, Parking Brake, Brake System Bleeding Procedure, Service Brake, Master Cylinder |
| Hydraulic Steering | 385-404 | Technical Data, Steering Circuit, Flow Regulating Valve Operation, Steer Pump, Power Steering Operation, Hydraulic Steering Unit, Steering Column, Steering Ram Operation |
| Electrics | 405-436 | Technical Data, Batteries, Alternators, Charging Circuit Check, Starting Circuit Test, Starter Motor - Lucas M50 and M127, Circuit Diagram |
| Service Tools | 437-450 | Service Tool Numerical List, Hydraulics Tools, Attachments Tools, Transmission Tools, Axles Tools, Steering Tools, Sealing and Retaining Compounds |
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 2WD models | ||
| Wheel bolts torque | 405 Nm (300 Ibf ft) | p. 340 |
| All Models | ||
| Typical ram piston head torque | 405 Nm (41 kgf m, 300 Ibf ft) | p. 139 |
| Typical ram end cap torque | 678 Nm (69 kgf m, 500 Ibf ft) | p. 139 |
| Hydraulic filter element replacement interval | 500 Hours | p. 20 |
| Air filter outer element replacement interval | 1000 Hours | p. 228 |
| Air filter inner element replacement interval | 2000 Hours | p. 228 |
| Shuttle Reverser Forward Clutch pack clearance | 0.3 to 1.2mm (0.011 to 0.046in.) | p. 251 |
| JCB Transmission end plate end-float | 3.6 to 4.4 mm (0.140 to 0.170 in) | p. 295 |
| Hamworthy Pump bolt 3 torque | 203 Nm (21 kgf m, 150 Ibf ft) | p. 25 |
| all up to m/c no. 296220 | ||
| Hydraulic filter nut C torque (Original filter to m/c no. 296220) | 88 Nm (65 Ibf ft) | p. 20 |
| 4/98NT, 4/98TT | ||
| Fuel filter element replacement interval (4/98 Engine) | 500 Hours | p. 216 |
| 4.236 (LD), T4.236 (LH), T4.236 (LJ) | ||
| Fuel filter element replacement interval (4.236 Engine) | 500 hours | p. 217 |
