2001-2007 JCB 4CX-M Military Backhoe Loader Service Manual

Complete service procedures, hydraulic systems, torque specifications, and maintenance for JCB's 4CX-M Military variant. PN 9803/3275

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Document Details

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Document Number / Seller:
25000 / Richard Reyes
File Size:
26.22 MB
File Type:
PDF
Language:
English
Pages:
451
Printable:
Yes
Category:
Backhoe Loader
Last updated / verified
Dec 18, 2025

Models Covered & Key Technical Specifications

JCB 4CX-M Military Backhoe Loader — 2001–2007 Manufacturer Tactical Expert Repository | 4CX-M Series Module.

  • Established Heat Dissipation Data: Hydraulic system capacity reaches 150 litres (33 UK gal) fuel tank volume corresponds to optimal storage Parameters.
  • Reference Production Rate: Theoretical pump displacement section 1 achieves 33 cc/rev (2.01 cu in/rev) at standard operating pressure Architecture.
  • Certified Form Factor: Pump section 2 displacement defines 23 cc/rev (1.40 cu in/rev) for secondary circuit flow Protocol.
  • Factory Tightening Data: The loader valve block requires 9.5 Nm (7 lbf ft) torque setting is calibrated to seal plate fastening Norms.
  • Integral Gap Specs: Main relief valve (M.R.V.) pressure rating is standardized to 236–241 bar (3420–3500 lbf/in²) system protection Bounds.
  • Specific Working Temperature: Hydraulic system operating envelope reaches 50°C (122°F) optimal fluid viscosity for full machine performance Topology.

Professional Workshop Service Manual & Technical Specifications

Systematic Shop Manual: JCB 4CX-M Military Backhoe Loader Service Reference-Guide

Design-Core: 4CX-M (Military), 2001-2007 // Unit-Designations: Hydraulic, Pneumatic, Transmission Control Logic // Technical-Domain: Component specifications, system interfaces, operational protocols.

System Category Component Overview Documentation Scope
Engine & Cooling Fuel, coolant, air systems Complete specifications provided
Hydraulic Power Pumps, valves, rams, accumulators Detailed component procedures
Transmission Powershift, clutch packs, controls Full operational diagrams included

Organized into dedicated modules for General Information, Care & Safety, Routine Maintenance, Attachments, Body & Framework, Electrics, Controls, and Hydraulics, the manual documents engine systems and transmission assemblies, along with steering configuration and brake performance protocols. The document includes wiring diagrams for electrical circuit identification, schematic layouts for hydraulic circuit navigation, and torque specifications for the loader pivot assembly to ensure proper structural alignment.

Strategic Topology

Reference data is included for service schedules detailing maintenance intervals—10-hour through 2000-hour cycles—spanning engine oil changes, transmission fluid sampling, hydraulic filter renewal, and steering geometry verification. The manual covers loader arm operations including lift ram dynamics, shovel control spool mechanics, and stabiliser leg wear pad adjustment procedures. Detailed procedures are documented for engine panel access, air filter element replacement, and coolant system circulation checks, with notation of recommended lubricant viscosity ranges for ambient temperature conditions.

Precise Logic-Path

Inspection guidelines are provided for fuel system integrity, hydraulic hose routing and connection security, electrical component harness continuity, and brake system fluid saturation detection. The document includes component removal sequences for major assemblies—boom and dipper linkages, kingpost pivot bearings, front and rear axle differential units—with referenced torque settings for fastener security validation. Technical data identifies hydraulic pump displacement figures, system pressure relief thresholds, and transmission clutch pack engagement parameters.

Strategic Parameters

Alignment specifications are included for wheel rim geometry, steer axle centerline positioning, and driveshaft critical speed limits. This manual documents torque specifications for the loader pivot pins to ensure proper load distribution. The document provides diagnostic protocols for intermittent electrical faults, pressure loss characterization in closed hydraulic circuits, and transmission gear engagement sequence verification. Component identification photographs and dimensional drawings facilitate accurate part sourcing and assembly positioning.

Integrated Benchmarks

The manual delivers comprehensive coverage of the 4CX-M military variant powertrain, detailing the Perkins engine family specifications, Powershift transmission control logic, and dual-section hydraulic pump flow management architecture. Included are service tool catalogs—pressure test kits, seal fitting assemblies, bearing press fixtures, flow measurement equipment—enabling field maintenance operations. The document references quick-hitch coupling protocols, breakaway valve operation principles, and accumulator nitrogen charging procedures with specified pressure ranges.

Integrated Framework

Attachment integration chapters cover optional equipment including the Hammermaster rockbreaker system (with principle of operation diagrams), Sweeper Collector assembly and brush wear monitoring, Earth Drill gearbox service specifications, and auxiliary hydraulic valve pressure adjustment techniques. The manual documents sideshift carriage clearance settings, Hydraclamp solenoid circuit logic, and backhoe bucket crowd control spool mechanics. Safety information is embedded throughout with specific precautions for pressurized accumulator handling, hydraulic hose burst protection verification, and electrical system isolation procedures during service operations.

FAQ

What specifications are **essential** for testing the main relief valve? keyboard_arrow_down

236-241 bar (3420-3500 lbf/in²) is the required pressure setting for the main relief valve (M.R.V.) on the loader valve block, tested with hydraulic oil at 50°C working temperature.

Check the **correct** diagnostic procedures for slow hydraulic operations? keyboard_arrow_down

4-400 bar (0-6000 lbf/in²) pressure gauge must be connected to the loader valve test connector point A to diagnose auxiliary relief valve issues and unloader valve performance when rams operate sluggishly.

What does the **documented** fluid capacity requirement specify for the transmission? keyboard_arrow_down

15.4 litres (fluid capacity) must be maintained in the powershift transmission system using JCB Extreme Performance oil, with minimum and maximum marks clearly indicated on the dipstick for proper system operation.

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The JCB 4CX Service Manual is incredibly detailed and easy to follow. I had a few questions during the download process, and the support team was quick to respond and very helpful. Highly recommend this manual for anyone looking to maintain their backhoe loader!