The Hitachi Zaxis 225USRLC-3 is a robust Hydraulic Excavator from the 3 Series, engineered for demanding construction and industrial applications. This model features a powerful Hino J05E-TI diesel engine, a turbocharged and intercooled unit displacing 5.12 L, delivering a gross power output of 126 kW (169 hp) and meeting Tier 3 / EU Stage IIIA emissions standards. Its hydrostatic drive system and substantial operating weight of 22,800 kg, combined with a track shoe width of 600 mm, ensure stability and performance on challenging terrain. The Zaxis 225USRLC-3 is built for reliability and efficiency, making it a trusted choice for heavy-duty operations. This comprehensive Service Manual provides essential information for the maintenance and repair of the Hitachi Zaxis 225USRLC-3 Hydraulic Excavator. Covering a wide range of topics, it details critical maintenance procedures, including fluid capacities for engine oil, hydraulic oil, and fuel, as well as recommended filter types and lubrication points. Technical specifications, such as engine details, drive system information, and operating dimensions, are clearly outlined. This manual serves as an indispensable resource for owners, technicians, and mechanics, enabling them to ensure the optimal performance, longevity, and safe operation of their equipment.