JCB 520-50, 525-50, 525-50S Loadall Service Manual (9803-3620-9)

This comprehensive service manual provides technicians and operators with advanced technical data, diagnostics, and repair instructions for JCB 520-50, 525-50, and 525-50S Loadall models. Covering all major systems including hydraulics, electrics, transmission, and braking, it ensures precision maintenance and reliable field performance.

Model Covers:

JCB 520-50 from Serial No. 754001
JCB 525-50 from Serial No. 789308
JCB 525-50S from Serial No. 1037581

File Format: PDF

Size: 4.15 MB

No. of pages: 280

Language: English

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

📑 Included Sections:

General Information

• Machine identification, serial numbers, and torque settings
• Service tools overview and sealing compounds reference

Care & Safety

• General and operational safety guidelines
• Maintenance safety protocols and health considerations for lubricants

Routine Maintenance

• Lubrication schedules, grease points, and fluid capacities
• Service intervals including 50h, 500h, and 1000h maintenance procedures
• Tyres, wheels, engine air filter, and fuel system maintenance
• Cooling system and battery care instructions

Body & Framework

• Cab removal and direct glazing replacement
• Hydraulic and fuel tank service procedures
• Boom wear pad replacement and shovel alignment adjustments

Electrics

• Wiring schematics and technical data
• Battery, alternator, and starter motor servicing
• Diagnostic tests for relays, fuses, and Safe Load Indicator system

Hydraulics

• Hydraulic circuit schematics and fault finding procedures
• Pump, valve block, and ram disassembly, inspection, and reassembly
• Main and auxiliary relief valve testing

Transmission

• Syncro Shuttle gearbox, torque converter, and reverser unit servicing
• Axle removal, drive head overhaul, and propshaft maintenance
• Pressure, flow testing, and stall tests

Brakes

• Brake system venting, pressure testing, and component servicing
• Parking brake adjustment, dismantling, and assembly

Steering

• Hydraulic steering unit service and re-alignment procedures
• Bleeding procedures and circuit descriptions

Engine

• Engine speed setting and radiator fan speed adjustments
• Reference to detailed engine service manuals for various builds

Note: For further engine details see Engine Service Manual Publication No. 9806/0100 (AA builds), 9806/2140 (AR and AK builds), 9806/2250 (RE builds).

This JCB Loadall service manual is an indispensable tool for advanced repairs, preventative maintenance, and technical diagnostics across multiple 520-50, 525-50, and 525-50S models in agricultural and construction environments.