The JCB 804 Plus Mini Excavator, designed for efficiency and robust performance, represents a significant advancement in compact construction equipment. Built with JCB's renowned engineering quality, this machine offers exceptional reliability and a unique blend of power and maneuverability, making it ideal for a wide range of excavation and site preparation tasks. Its hydrostatic transmission, coupled with variable displacement hydraulic motors, ensures smooth operation and precise control, while features like ROPS/FOPS provide enhanced operator safety. The 804 Plus is engineered to deliver consistent results in demanding environments. This Service Repair Workshop Manual provides comprehensive guidance for the JCB 804 Plus Mini Excavator, covering serial numbers 734402 to 734629. It details essential maintenance procedures, including lubrication schedules for all pivot points and linkage systems, and outlines troubleshooting steps to address potential issues. Technical specifications for the diesel engine, hydraulic system, and undercarriage are included, along with operational capabilities such as digging depth and reach. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their JCB 804 Plus.