The Hitachi Zaxis 225US is a robust excavator engineered for demanding construction and earthmoving applications. This model, part of the Zaxis Series, features a powerful ISUZU AH-6HK1X diesel engine, delivering 122 kW (163 HP) and displacing 7.789 liters, coupled with a hydrostatic transmission for efficient operation. Its substantial operating weight of 21,600 kg and impressive digging depth of 6.76 meters make it a versatile and reliable machine for various project requirements. This comprehensive Workshop Service Repair Manual provides essential information for maintaining and repairing the Hitachi Zaxis 225US. It covers critical areas including detailed maintenance procedures, troubleshooting guides, technical specifications for the engine, hydraulic system, and undercarriage, as well as important safety guidelines. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their equipment.