This workshop service manual covers the JCB 801.4, 801.5, and 801.6 Excavator models. These excavators are engineered for demanding tasks, offering robust performance and reliability. The manual is designed to provide comprehensive information for the repair and overhaul of these machines, ensuring optimal operation and longevity. The purpose of this manual is to assist mechanical technicians in performing routine maintenance, servicing, and diagnostic and repair procedures for the JCB 801.4, 801.5, and 801.6 Excavators. It includes detailed instructions on system coverage, removal and installation procedures, and the use of special tools. By following the guidance within this manual, users can achieve significant savings and maintain their equipment effectively, mirroring the information found in authorized service departments.