This repair service manual covers Hitachi Zaxis excavators, including models 200, 225USR, 225US, 230, and 270. These machines are engineered for demanding construction and earthmoving applications, featuring robust diesel powertrains and hydrostatic transmissions designed for reliability and efficient operation. Their construction emphasizes durability and performance, making them a trusted choice for various heavy-duty tasks. This manual provides comprehensive guidance for maintaining and repairing your Hitachi Zaxis excavator. It details essential maintenance procedures, including fluid capacities and service intervals for the engine oil, hydraulic oil, coolant, and fuel. Technical specifications, troubleshooting information, and safety guidelines are also included to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the equipment.