JCB 520-40 / 524-50 / 527-55 Service Manual

Comprehensive service manual for JCB 520-40, 524-50, and 527-55 telehandlers. Includes detailed diagrams, troubleshooting, and maintenance procedures. Part 9803/3690-10.

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Document Details

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Document Number / Seller:
30586 / Carol Parker
File Size:
38.17 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Telehandler
Last updated / verified
Feb 19, 2026

Models Covered & Key Technical Specifications

JCB 520-40 / 524-50 / 527-55 Service Manual: JCB Telehandler Comprehensive Official Repair Manual Troubleshooting-Index | JCB Library

  • Service Requirements: All routine service checks should only be carried out by a JCB trained specialist.
  • Lubricants: Always use the recommended type of grease and keep types separate.
  • Hydraulic Pressure: Residual hydraulic pressure trapped in the service hose line must be vented before connecting or removing hoses.
  • Engine Oil Level: Check that the oil level is between the maximum and minimum marks on the dipstick.
  • Tyre Inflation: Use an air supply system with a pressure regulator and a self-locking air chuck.
  • Electrical Circuits: Understand the electrical circuit before connecting or disconnecting an electrical component.

Professional Workshop Service Manual & Technical Specifications

JCB 520-40 / 524-50 / 527-55 Service Manual: JCB Telehandler Comprehensive Official Repair Manual

Model Data: JCB 520-40, 524-50, 527-55 (All models) // Category: Telehandler Logic // Technical Details: Comprehensive coverage including maintenance, troubleshooting, and parts information.

Table: Fluids, Lubricants and Capacities Item Capacity Litres (Gal) Fluid/Lubricant International Specification
Fuel Tank - 520-40 61 (13.4) Diesel Oil Acceptable and Unacceptable Fuels
Fuel Tank - 524-50, 527-55 75 (16.5) Diesel Oil Acceptable and Unacceptable Fuels
Engine (Oil) - 520-40 10.5 (2.3) JCB High Performance 15W/40 ACEA E2:B2:A2, API CF4/SG
Engine (Oil) - 524-50, 527-55 8.5 (1.9) JCB High Performance 15W/40 ACEA E2:B2:A2, API CF4/SG
Engine (Coolant) 8 (1.8) JCB HP Performance Antifreeze and Inhibitor/Water ASTM D6210
Transfer Gearbox 0.75 (0.17) JCB HD90 Gear Oil API GL 5
Axles - Housing (x 2) 5.0 (1.1) JCB HD90 Gear Oil API GL 5
Axles - Hubs (x4) 0.5 (0.1)
Hydraulic Tank(1) - 520-40 68 (15) JCB High Performance 10W/30 ACEA E2:B2:A2, API CF4/SG
Hydraulic Tank(1) - 524-50, 527-55 33 (7.3) JCB High Performance 10W/30 ACEA E2:B2:A2, API CF4/SG
Grease Points(2) JCB HP Grease Lithium complex NLGI No. 2 consistency including extreme pressure additives.
Wear Pad Runways JCB Waxoyl
Braking System - 520-40 JCB Light Hydraulic Fluid(3) ISO 15
Braking System - 524-50, 527-55 2.0 (0.4) JCB Light Hydraulic Fluid(3) ISO 15

Table of Contents Summary

  • Section 1 - General Information: Covers torque settings and service tools.
  • Section 2 - Care and Safety: Details warnings and cautions pertinent to workshop procedures.
  • Section 3 - Maintenance: Includes service schedules and recommended lubricants.
  • Section A - Attachments: Discusses quick release couplings and connecting/disconnecting procedures.
  • Section B - Body and Framework: Covers Load Moment Indicator (LMI) troubleshooting and calibration.

Introduction

This service manual provides detailed information for the maintenance and repair of JCB Compact Loadalls. It is intended for trained service engineers and includes sections on general information, care and safety, maintenance schedules, engine, transmission, axles, hydraulics, brakes, electrics, bodywork, and attachments. The manual emphasizes the importance of using genuine JCB parts and following manufacturer-recommended procedures for optimal machine performance and safety. Consistent adherence to maintenance schedules ensures improved reliability and resale value. The manual also details the use of specialized tools and diagnostic procedures for troubleshooting various systems. Torque specifications are provided for fasteners, and fluid capacities and types are listed for essential maintenance tasks. Adherence to safety warnings and precautions is paramount throughout all procedures.

Engine

The engine section details maintenance for the JCB Dieselmax engine, including checking and changing the oil and filter, cooling system checks, drive belt inspection, and air filter maintenance. Procedures for cleaning the air filter dust valve and replacing elements are explained. The manual also covers fuel system maintenance, including draining the water separator and fuel filter, changing the pre-filter, and bleeding the system. Proper fuel handling and the use of approved fuels are emphasized to prevent damage to the fuel injection equipment.

FAQ

Calculate the **pressure** specifications for hydraulic connections? keyboard_arrow_down

18.0 Nm is the standard torque specification for BSP Adaptors, 1/4 in. size, as detailed in Table 8 of the manual.

What values are **proper** for brake system fluid replacement? keyboard_arrow_down

The brake system fluid should be changed according to the schedule, with a replacement interval for the 520-40 (All) and 524-50, 527-55 (Up to SN 1069456) models found on page 3-45.

Assess the **standard** service interval parameters for the engine? keyboard_arrow_down

For the JCB Dieselmax engine, the standard interval for oil and filter changes is every 500 hours or six months, whichever comes first, as outlined in the Service Schedules section.

Customer Reviews

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Reviews (4)

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This manual has been a lifesaver for my maintenance team. The detailed sections on the hydraulic and electrical systems are especially helpful. Plus, the download process was smooth and the support team was quick to respond to my questions!
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Rated 4 out of 5 stars
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Rated 4 out of 5 stars
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The troubleshooting section saved me a lot of time. I was impressed with how easy it was to download, and the customer service was very professional when I reached out for clarification on a few points. Highly recommend!