The Hitachi Zaxis ZX 225US-3 is a robust excavator engineered for demanding construction and earthmoving applications. This Dash-3 generation model embodies Hitachi's commitment to reliability and advanced technology, featuring a powerful Isuzu 6HK1X diesel engine that delivers 160 net horsepower. Its hydrostatic transmission ensures smooth operation and efficient power transfer, while the optimized hydraulic system, with a pump flow rate of 210 lpm, provides exceptional performance for digging and material handling. With an operating weight of 21,600 kg and a bucket capacity of 0.96 m³, the ZX 225US-3 is designed for productivity and durability in challenging environments. This comprehensive Workshop Service Manual provides essential information for maintaining and repairing the Hitachi Zaxis ZX 225US-3 excavator. It covers a wide range of topics, including detailed engine specifications, hydraulic system components, transmission operation, and critical maintenance procedures such as fluid capacities and replacement intervals for filters and oil. The manual also includes technical specifications for dimensions and performance parameters, offering valuable guidance for owners, technicians, and mechanics. By following the procedures outlined within this 699-page English-language document, users can ensure the optimal performance, longevity, and safety of their equipment.