The Hitachi Zaxis 225USLC-3 Hydraulic Excavator represents a significant advancement in the LC-3 Series, engineered for robust performance and reliability in demanding construction environments. This machine is designed with precision hydraulics and a powerful Hino J08E-US diesel engine, delivering 116 kW (156 hp) of net power and 739 Nm of torque, ensuring efficient operation for a wide range of excavation tasks. Its compact radius design, coupled with an operating weight of 22,400 kg and impressive digging capabilities, makes it a versatile tool for tight job sites and complex projects. This comprehensive service manual provides detailed workshop information essential for the maintenance and repair of the Hitachi Zaxis 225USLC-3. It covers critical areas including engine specifications, hydraulic system details, fluid capacities, and performance metrics. Owners, technicians, and mechanics will find invaluable guidance on procedures, troubleshooting, and technical data, enabling them to ensure optimal performance, longevity, and safety of the equipment. The manual is presented in English and contains 699 pages of technical expertise.