This workshop service repair manual covers the JCB 508-40 Telescopic Handler, serial numbers 562601 to 579365. The JCB Telescopic Handler is engineered for robust performance and reliability in demanding work environments. This manual provides comprehensive information to ensure optimal operation and longevity of your equipment. This manual is designed to be a complete official factory service repair resource for both do-it-yourself enthusiasts and experienced mechanics. It includes detailed substeps, notes, cautions, warnings, numbered instructions, illustrations, drawings, photos, and enlarged inset views. Key areas covered include troubleshooting, electrical service procedures, wiring diagrams, hydraulic system repair, body and framework maintenance, axle procedures, brake system diagnosis, steering system repair, and specialized equipment options such as boom float and return to dig.