JCB 528-70 & 528S Machines Loadall Service Manual (9803/3650-4)

JCB 528-70 & 528S Machines Loadall Service Manual (9803/3650-4)

This official JCB workshop manual provides comprehensive technical guidance, diagnostic procedures, and step-by-step service instructions for the JCB 528-70 and 528S Loadall machines. It is an essential resource for professional mechanics and technicians working on machine calibration, drivetrain overhaul, hydraulic system tuning, and safety maintenance for All Wheel Steering (AWS) configurations.

Model Covers:

This manual applies to the following JCB Loadall models:

JCB 528-70 AWS from serial number 796000.
JCB 528S AWS from serial number 796102.

Note: Each model may include variant configurations; refer to relevant subsections for detailed specifications and maintenance data specific to each build type (AK, AR, RE, RG).

File Format: PDF

Size: 40.74 MB

No. of pages: 399

Language: English

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

📑 Included Sections:

General Information

• Machine, engine, transmission, and axle identification details
• Comprehensive torque settings for fasteners and subassemblies
• Service tool listings, numerical index, and reference diagrams
• Sealing and retaining compounds specifications

Care & Safety

• General safety notices and operational best practices
• Health and safety measures related to lubricants and fluids
• Maintenance and workshop safety protocols

Routine Maintenance

• Lubrication charts for multiple build configurations (AK–AR, RE–RG)
• Service schedules for 50, 500, and 1000-hour intervals
• Fluid capacities, approved lubricants, and service intervals
• Procedures for filters, tyres, air and fuel systems, cooling systems
• Hydraulic system maintenance and valve servicing
• Battery maintenance, electrolyte checks, and safety symbols

Body & Framework

• Cab removal, replacement, and glazing procedures
• Combined fuel and hydraulic tank service and replacement
• Boom removal, wear pad replacement, and alignment procedures
• Rivet nut fitting, structural fastener replacement
• Air conditioning system operation, fault diagnosis, refrigerant charging, leak testing, and wiring diagrams

Electrical Systems

• Fuse and relay identification (528-70 & 528S variants)
• Wiring schematics and harness numbering
• Multimeter usage, resistance, and voltage measurement
• Starter motor and alternator testing, removal, and assembly
• Safe Load Indicator (SLI) and Load Moment Indicator (LMI) calibration and fault diagnosis
• Parking brake switch adjustment and circuit checks

Hydraulic Systems

• Hydraulic schematics for dual and single lever control systems
• Valve block dismantling, assembly, and relief valve testing
• Rams removal, inspection, and assembly procedures
• Pump diagnostics, servo pressure inspection, and fault finding charts
• Diverter and pilot pressure valve maintenance

Transmission

• Syncro Shuttle and Powershift transmission operation
• Torque converter testing, dismantling, and reassembly
• Axle servicing, hub assembly, brake systems, and differential inspection
• Drop box dismantling and assembly procedures

Brakes

• Parking brake adjustment, pad renewal, and bleeding
• Component leakage diagnosis and seal inspection
• Master cylinder removal and replacement

Steering

• All Wheel Steering (AWS) system operation and valve testing
• Steer mode descriptions, re-alignment procedures
• Hydraulic steering unit dismantling and assembly
• Priority valve cleaning, shock valve inspection, and powered track rod service

Engine

• Technical data for AK, AR, RE, RG build variants
• Engine and transmission removal and separation procedures
• Radiator servicing, alignment, and replacement

Note: For further engine details see Engine Manual Publication No. 9806/2140( AK, AR builds), 9806/2250 (RE, RG Builds)

This JCB 528-70 & 528S Loadall Service Manual is a critical reference for service engineers performing complete overhauls, component testing, and precision calibration on all-wheel steering Loadall models.