This workshop service repair manual provides comprehensive information for the JCB 801.4, 801.5, and 801.6 excavators. These excavators are engineered for demanding tasks, offering robust performance and reliability. The manual covers all aspects necessary for maintaining these machines in optimal working condition, ensuring their continued operational efficiency and longevity. The scope of this English-language manual encompasses detailed procedures for repair, maintenance, adjustments, and the removal and installation of vehicle components. It includes essential data such as service specifications, tightening torques, wear limits, and troubleshooting guides, supported by numerous pictorial diagrams, detailed illustrations, and photos. Safety instructions, including notes, cautions, and warnings, are prominently featured to ensure accident prevention and proper procedure execution. This manual is an indispensable resource for owners, mechanics, and technicians.