The Hitachi Zaxis 225US is a robust excavator designed for demanding construction and earthmoving applications. Engineered for reliability and performance, this machine features a powerful Cummins QSB6.7 diesel engine delivering 120 kW (161 hp) and a displacement of 6.67 L. Its hydrostatic transmission provides variable speed control, while its substantial operating weight of 22,700 kg (49,944 lbs) ensures stability during operation. With a maximum digging depth of 6,710 mm (22 ft 0 in) and a generous bucket capacity ranging from 0.94 to 1.4 m³ (1.2 to 1.8 yd³), the Zaxis 225US is built to tackle a wide array of tasks efficiently. This Factory Service Repair Manual in English provides comprehensive guidance for the maintenance and repair of the Hitachi Zaxis 225US excavator. It covers essential areas including detailed maintenance procedures, troubleshooting common issues, and technical specifications for all major systems, such as the engine, hydrostatic transmission, and hydraulic system. The manual is an indispensable resource for owners, mechanics, and technicians, offering the necessary information to ensure the longevity, optimal performance, and safe operation of the equipment.