This workshop service repair manual covers JCB telescopic handlers, models 506, 506HL, and 508C, for serial numbers 579569 onwards. These machines are engineered for demanding applications, offering robust performance and reliability. Their design prioritizes operational efficiency and longevity, making them a valuable asset for various industrial and construction tasks. This manual is designed to support the maintenance and repair of these high-quality machines. The purpose of this comprehensive English-language manual is to provide detailed information for the repair, maintenance, and adjustment of your JCB telescopic handler. It includes step-by-step procedures, diagnostic information, service data, torque values, and detailed illustrations to assist owners, mechanics, and technicians. Adhering to the guidelines within this manual, including the use of genuine parts and approved lubricants, will help maximize the handler's life, ensure its reliability, and maintain optimal operating condition.