This manual covers JCB 520-55, 526, 526S, and 526-55 models, designed for robust performance in demanding environments. These machines are engineered for reliability and efficiency, offering powerful capabilities for various industrial and construction applications. Understanding the specific serial number ranges is crucial for accurate model identification: 520-55 models from 277001-280299, 526 and 526S models from 279289-280299, and 526-55 models from 277468-279288. The Service Repair Workshop Manual provides comprehensive guidance for maintaining and repairing these JCB machines. It includes detailed information on general information, care, safety, routine maintenance, and specific systems such as attachments, body framework, electrics, controls, hydraulics, transmission, brakes, steering, and the engine. With step-by-step instructions, zoomable illustrations, and detailed component explosions, this manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance and longevity.