The Hitachi Zaxis ZX 210K-3 is a robust excavator engineered for demanding construction and earthmoving applications. Powered by a Hino J05E-TA diesel engine, this machine delivers reliable performance with a net power of 146 hp and a displacement of 5.12 liters, meeting EPA Tier 3 and EU Stage IIIA emission standards. Its hydrostatic transmission, coupled with a standard bucket capacity of 0.92 m³ and an operating weight of 21,700 kg, makes it a versatile and efficient tool for a wide range of projects. The Zaxis ZX 210K-3 is designed with durability and operational excellence in mind, reflecting Hitachi's commitment to quality and innovation in heavy equipment. This Workshop Service Manual, provided in English, serves as a comprehensive guide for the maintenance and repair of the Hitachi Zaxis ZX 210K-3 excavator. Covering essential areas such as engine specifications, hydraulic system details, transmission functions, and undercarriage components, this manual offers detailed procedures and technical data. It is an indispensable resource for owners, technicians, and mechanics, enabling them to perform routine maintenance, troubleshoot issues effectively, and ensure the longevity and optimal performance of the equipment. With 699 pages of detailed information, this manual is designed to support all aspects of the excavator's service life.