This manual covers the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 125 US. It is designed to provide comprehensive information for technicians and mechanics working with this model. The HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 125 US is engineered for demanding applications, emphasizing reliability and performance in its class. This service repair manual contains detailed technical data, circuit diagrams, and equipment information directly from the manufacturer. It covers a wide range of systems including General Information, Fuel System, Chassis, Cooling System, Engine components, Clutch, Lubrication, Drive, Transmission, Wheels/Tires, Final Drive, Brakes, Suspension, Steering, Frame, and the Electrical System with wiring diagrams. This resource is intended to assist in the maintenance, repair, and understanding of the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 125 US.