The JCB 504B / 526 Telescopic Handler represents robust engineering designed for demanding operational environments. While specific production years are not detailed, this equipment is built for reliability and efficiency in various material handling tasks. Its telescopic design offers versatile reach and lifting capabilities, making it an indispensable tool across construction, agriculture, and industrial sectors. The inherent quality of JCB machinery ensures dependable performance and longevity, even under strenuous conditions. This workshop service manual provides comprehensive technical information for the service and repair of the JCB 504B and 526 Telescopic Handlers. It covers essential maintenance procedures, diagnostic troubleshooting, and detailed technical specifications necessary for optimal performance and longevity. The manual is intended for owners, mechanics, and technicians, offering the guidance required to effectively maintain and repair these machines, ensuring they operate at peak efficiency and safety standards.