The Hitachi Zaxis 225USR is a robust construction machine designed for demanding tasks. Powered by a reliable Isuzu AA-6HK1XPN diesel engine, it delivers efficient performance with a net power output of 122 kW (164 hp). Its hydrostatic transmission and two-speed travel system ensure optimal maneuverability and control across various job sites. With an operating weight of 21,700 kg and impressive digging capabilities, including a maximum digging depth of 6,660 mm and a reach of 9,920 mm, this excavator is engineered for productivity and durability. This Workshop Service Manual (WSM) provides comprehensive, in-depth service and repair information for the Hitachi Zaxis 225USR. It covers essential maintenance procedures, detailed troubleshooting guides, technical specifications, and crucial safety guidelines. This manual is an indispensable resource for owners, mechanics, and technicians, enabling them to perform routine maintenance, diagnose issues, and conduct repairs effectively, ensuring the longevity and optimal performance of the equipment.