JCB 406, 407, 408 & 409 Wheel Loader Service Manual

JCB 406, 407, 408 & 409 Wheel Loader Technical Manual

• Covers 406, 407, 408, and 409 JCB wheel loader variants, including the 409 Telemaster model
• Official JCB Service publication P/N 9803/4200, Issue 11
• Contains 47 torque specifications, 16 hydraulic system schematics, and detailed grease-point illustrations
• Delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Contains coverage for 11 specific mechanical systems, from engine and transmission to hydraulic steering and electrical architecture
• This Issue 11 publication represents the final factory-authorized documentation for the 400-series wheel loader range, detailing serial-specific maintenance and component replacement procedures for machines starting from 632700

Component and System Documentation

The manual catalogs procedures across eleven technical groupings. The general section details fluid types, capacities, and lubricant specifications, including multi-grade oil requirements and anti-freeze mixtures. Hydraulics coverage is extensive, providing circuit diagrams, pump operation theory, and specific testing parameters for main and auxiliary relief valves. Body and framework sections document cabin removal, glazing procedures for bonded glass, and center pivot overhaul, ensuring structural integrity is maintained. The engine, transmission, and axle chapters focus on assembly and maintenance, incorporating high-tensile bolt torque requirements for every major joint.

Specification and Data Preview

Technical data is provided for precision assembly and routine maintenance. Main relief valve operating pressures are documented for each model, with specific auxiliary relief valve pressures listed for the loader’s implement circuits. Cylinder ram dimensions, bore diameters, and stroke lengths are tabulated to assist in component identification. Torque settings for UNF Grade S and Metric 8.8 bolts are explicitly listed to prevent structural failure. For the cooling system, capacity for the 406 model is documented at 12.5 liters, while the 408 system holds 15.5 liters. The Suzuki QuadRunner LT300E magneto pick-up coil resistance is specified at 450–650 ohms. The primary mounting bolt torque for core machine structures is documented at 47 Nm.

Reference only — always consult a certified technician before performing service on this equipment.

An official 457-page JCB OEM service manual covering the 406, 407, 408, and 409 wheel loaders, documenting engine, hydraulic, electrical, and structural specifications for machines with serial numbers starting from 632700.

Document Reference: Publication No. 9803/4200, Issue 11