The Hitachi Zaxis 225USR-3 Hydraulic Excavator, a member of the 3 Series, is engineered for demanding construction and earthmoving tasks. This model features an Ultra Short Radius Link (USRL) design, offering enhanced maneuverability in confined spaces. Powered by a robust Hitachi Hino J05E-T SS diesel engine, this excavator delivers efficient performance with its turbocharged and intercooled system, producing a net power of 116 kW (156 hp). Its substantial operating weight of 22,700 kg and advanced hydraulic system, with a main pump flow of 2 x 207 L/min, ensure powerful and precise operation for a wide range of applications. This comprehensive Service Manual provides essential information for the maintenance and repair of the Hitachi Zaxis 225USR-3 Hydraulic Excavator. It covers critical areas including detailed maintenance procedures, troubleshooting guides, technical specifications, and safety protocols. With 699 pages of detailed content, this manual is an indispensable resource for mechanics and technicians, enabling them to effectively service and maintain the excavator, ensuring its optimal performance and longevity. The manual is presented in English.