Part of the JCB Repair Manuals.
Built strictly for the model years, this 255-page JCB 403 Service Manual PDF (OEM #9803-9490-4) breaks down the complete engine, hydraulic, and electrical systems for your compact wheel loader. You get full hydraulic schematics detailing loader control valves, clear electrical wiring diagrams for continuity testing, and an extensive engine troubleshooting section. Open to any chapter and find step-by-step procedures for tearing down the chassis, calibrating the fuel system, and diagnosing heavy exhaust smoke. Verify your transmission pump hits a maximum pressure of 350 bar, and confirm the front wheel nuts are locked down to exactly 200 Nm before rolling out of the bay. Quit wasting hours trying to trace a phantom voltage drop. Grab this bookmarked download, open it on your shop tablet, and get the machine back in the dirt.
Complete the set for your 403, JCB 403
- Operator Manual: JCB 403 Wheeled Loader Operator Manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Care and Safety | 29-41 | Safety Check List, Operating Safety, Maintenance Safety, Safety Decals |
| Maintenance | 42-99 | Routine Maintenance, Fit for Purpose Tests for Lifting Equipment, Health and Safety, First Aid - Oil, Battery, Warning Symbols, Service Schedules, Pre-Start Cold Checks |
| Attachments | 100-107 | Introduction, Quick Release Couplings, Connecting and Disconnecting |
| Body and Framework | 108-117 | Rivet Nuts, Slide Hammer Kit, Chassis Assembly, Front and Rear Chassis |
| Electrics | 118-153 | General Information, Testing, Specific Gravity Testing, Test Methods, Measuring DC Voltage, Measuring Continuity, Testing a Diode or a Diode Wire, Schematic Circuits |
| Hydraulics | 154-231 | Technical Data, Loader, Kohler 403 Pressure Settings, General Information, Contaminant Standards, Start-Up Procedure, System Operation, Control Valves |
| Engine | 232-255 | Fault Finding (Engine Does Not Start or Is Difficult to Start, Engine Starts But Runs Irregularly or Stalls, Engine Becomes Excessively Hot, Engine Appears Down on Power - Poor Performance, Engine Oil Pressure Is Excessively Low, Engine Does Not Run on All the Cylinders, Engine Oil Consumption Is Excessive, Engine Emissions - Blue Smoke, Engine Emissions - White Smoke, Engine Emissions - Black Smoke, Lubricating Oil in the Exhaust System) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Transmission Pump Maximum Pressure | 350 bar | p. 158 |
| Auxiliary Pump Maximum Pressure | 200 bar | p. 158 |
| Wheel Nut Torque (Front) | 200 Nm | p. 97 |
| Wheel Nut Torque (Rear) | 200 Nm | p. 97 |
| BSP Hose Torque Setting (1/8 in.) | 14.0 - 16.00 Nm | p. 13 |
| BSP Hose Torque Setting (1/4 in.) | 24.0 - 27.0 Nm | p. 13 |
| JCB 403 | ||
| Fuel Tank Capacity | 42 Litres | p. 56 |
| Deutz engine | ||
| Engine Oil Capacity (Deutz) | 5.8 Litres | p. 56 |
