The Hitachi Zaxis 225US-3 is a hydraulic excavator from the Zaxis-3 Series, engineered for robust performance and reliability in demanding work environments. This model features a powerful Isuzu AA-6HK1XQA diesel engine, delivering 120 kW (161 hp) and meeting Tier 3 / EU Stage IIIA emissions standards. Its design prioritizes operational efficiency with a hydrostatic swing and travel system, offering precise control and agility. With an operating weight of 22,300 kg and a compact tail swing radius of 2,800 mm, it is well-suited for confined spaces and urban construction projects. The Zaxis 225US-3 embodies Hitachi's commitment to advanced technology and durable construction, making it a dependable choice for a wide range of earthmoving applications. This comprehensive workshop service repair manual in English provides detailed information essential for the maintenance and repair of the Hitachi Zaxis 225US-3 hydraulic excavator. It covers critical aspects including engine specifications, transmission details, fluid capacities for various systems, and performance data such as digging depth and reach. The manual is designed to assist owners, mechanics, and technicians in understanding the machine's components, performing routine maintenance, troubleshooting issues, and executing necessary repairs. By offering in-depth technical guidance and specifications, this manual serves as an indispensable resource for ensuring the longevity and optimal performance of the Zaxis 225US-3.