This Service Repair Manual covers JCB Telescopic Handler models 505-19, 505-22, 506-36, 506B, 508-40, and 510-40, for serial number ranges specified within. These machines are engineered for demanding work environments, offering robust performance and reliability. Notable features include advanced hydraulic systems and specialized control options such as PlaceAce and Servo Controls, enhancing operational efficiency and versatility across various applications. This comprehensive manual provides detailed guidance for maintaining, assembling, disassembling, servicing, repairing, and diagnosing these telescopic handlers. It covers a wide array of technical topics, including hydraulics, framework, control systems, engine, transmission, axles, brakes, steering, and electrical systems. With clear explanations, diagrams, and specifications, this manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance and longevity of their JCB Telescopic Handlers.