The Hitachi ZX225USR-3 is a robust excavator from the Dash-3 Series, engineered for demanding construction and earthmoving applications. This model features a powerful Isuzu AA-6HK1X engine, delivering 124 kW (166 hp) and 746 Nm (550 lb-ft) of torque, ensuring efficient operation. Its hydrostatic transmission with a two-speed travel system provides excellent maneuverability on job sites. With an operating weight ranging from 21,700 to 23,200 kg and impressive digging capabilities, including a maximum digging depth of 6,610 mm and a reach of 9,950 mm, the ZX225USR-3 is built for productivity and reliability. This comprehensive Service Repair Workshop Manual in English is designed to guide mechanics and technicians through the maintenance and repair of the Hitachi ZX225USR-3 excavator. It covers essential areas such as detailed engine specifications, hydrostatic transmission operation, hydraulic system diagnostics, and undercarriage maintenance. The manual provides critical information on fluid capacities, dimensions, and performance data, enabling users to perform routine servicing, troubleshooting, and repairs effectively. Adherence to the procedures outlined in this manual will help ensure the optimal performance and longevity of the equipment.