JCB 520-55 Loadall Service Manual (9803-3610-10)

This service manual delivers comprehensive technical details, maintenance procedures, and diagnostic insights for JCB 520-55, 526-55, 526, and 526S Loadall models, including Rear Steering (RS) and All Wheel Steering (AWS) configurations. It is an essential tool for field technicians and workshop engineers ensuring reliable performance.

Model Covers:

This Service Manual covers the following machines, from Serial Number 277001:

• 520-55 RS (Rear Steering) Farm Special & Construction
• 520-55 AWS (All Wheel Steering) Farm Special & Construction
• 526-55 Farm Special & Construction
• 526-55 AWS (All Wheel Steering) Farm Special & Construction
• 526S AWS (All Wheel Steering) Farm Special & Construction

File Format: PDF

Size: 14.73 MB

No. of pages: 587

Language: English

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

📑 Included Sections:

General Information

• Machine identification, torque settings, and service tools listing
• Sealing and retaining compounds specifications

Care & Safety

• Comprehensive safety notices for operators and service personnel
• Lubricant health considerations and maintenance safety protocols

Routine Maintenance

• Service schedules for lubrication, oiling, greasing at 50h, 500h, 1000h intervals
• Air filter servicing, coolant system checks, fuel system bleeding procedures
• Syncro Shuttle transmission and axle oil servicing guidelines
• Hydraulic system filter replacement and fluid level checks

Body & Framework

• Cab removal, direct glazing replacement, and fuel/hydraulic tank servicing
• Boom wear pads maintenance and air conditioning system diagnostics

Electrics

• Relay and fuse identification for multiple model builds
• Wiring schematics, test methods, proximity switches adjustment, ECU diagnostics
• Safe Load Indicator and Load Moment Indicator calibration and fault finding

Controls

• 2/4 Wheel Disconnect adjustments and linkage servicing

Hydraulics

• Hydraulic schematics, pump operations, and valve block diagnostics
• Rams disassembly and reassembly including seal replacement
• Main and auxiliary relief valve testing procedures

Transmission

• Syncro Shuttle and Powershift transmission overhaul
• Torque converter servicing, fault finding, and testing protocols
• Axle and drive head dismantling, assembly, and lubrication guides

Brakes

• Compensating master cylinder servicing and parking brake adjustments
• Brake system bleeding, pressure testing, and fault diagnostics

Steering

• All wheel steer, 2-wheel, 4-wheel, and crab steer system operations
• Priority valve and hydraulic steering unit servicing procedures
• Powered track rod maintenance and road wheel realignment

Engine

• Radiator, engine, and transmission removal and replacement guidelines
• Reference to detailed engine manuals for AA, AB, AR, AK, RE, RG builds

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

This JCB 520-55 Loadall Service Manual is indispensable for workshop engineers and field technicians seeking detailed repair, diagnostic, and preventive maintenance procedures for Loadall machines operating in demanding environments.