JCB 125, 135, 145, 150, 155, 185 Fastrac Tractor Service Manual (9803/8000)

JCB 125, 135, 145, 150, 155, 185 Fastrac Tractor Service Manual (9803/8000)

This service manual offers complete technical data and system servicing for the JCB Fastrac 125–185 series tractors. It includes full instructions for maintenance, hydraulic circuits, electrical testing, gearbox servicing, suspension, braking, and PTO systems across multiple serial configurations.

Model Covers:

JCB Fastrac 125, 135, 145, 150, 155, 185

File Format: PDF

Size: 36.87 MB

No. of pages: 677

Language: English

Delivery Method: Instant Download - Access your file immediately after purchase.

📑 Key Technical Sections:

General Information and Safety

Serial number locations, torque settings, pipe connections, service tools list, sealing compounds, and site/operator safety procedures.

Routine Maintenance

Covers greasing charts, fluid checks, filter changes, coolant systems, belt adjustments, battery and brake service, tyre pressures, wheel torques, and air conditioning filter service.

Body and Cab Framework

Direct glazing, AOPS structure inspections, HVAC systems (operation, testing, diagnostics), cab panels, compressors, and safety protocols.

Electrics

Fuses, relays, complete wiring diagrams, multimeter test procedures, circuit tracing, alternator and starter motor service, batteries, digital speedometer setup, and tachometer diagnostics.

Controls

Mechanical and pneumatic control cables, throttle linkages, PTO selector mechanisms, air-assisted range change (JCB Selectronic), cylinder service, and microswitch calibration.

Hydraulic Systems

Neutral circuits, spool valves, flow and pressure testing, hydraulic kick-out, draft control, electronic draft diagnostics, solenoids, and accumulator servicing with full schematics.

Transmission and Gearbox

PTO gearboxes, main drive clutch, synchronised speed gearboxes, differential locks, splitter gears, clutch pressure testing, prop shaft assembly, and remote control calibration.

Axles and Driveline

PD70 and PD90 axle types, hubs, driveshafts, crownwheel/pinion adjustment, NoSPIN and Maxtrac differentials, pinion depth setup, and bearing preload settings.

Braking System

Foot brake, parking brake, exhaust brake (optional), trailer brake valves, air system compressors, calipers, unloader valves, relay valves, and full test procedures.

Steering

Pump testing, valve settings, steering box (early and late model differences), shaft alignment, and hydraulic steering diagnostics.

Suspension

Front suspension shock absorbers, anti-roll bars, Panhard rods, control arms, coil springs, and mounting brackets.

Engine (Overview)

Covers removal and replacement of Perkins and Cummins engines (detailed in separate engine manuals 9806/0100 and 9806/1170).

This manual is intended for dealership-level technicians servicing full mechanical, hydraulic, and electronic systems on JCB Fastrac tractor platforms from 125 to 185 series.