This manual covers the Hitachi ZX225USR-3 CLASS Excavator, a robust piece of equipment designed for demanding work. Built with engineering quality and reliability in mind, this generation of excavators offers advanced features and a hydrostatic transmission for efficient operation. The ZX225USR-3 and its variants, including the ZX225USRLC-3, ZX225USRK-3, and ZX225USRLCK-3, are engineered for performance and durability in various construction and industrial applications, with an approximate operating weight ranging from 22,000 to 23,000 kg depending on the specific model. This comprehensive Service Repair Workshop Manual provides essential information for maintaining and repairing your Hitachi ZX225USR-3 CLASS Excavator. It includes step-by-step instructions, detailed diagrams, illustrations, and wiring schematics to guide you through all maintenance procedures, diagnostic processes, and troubleshooting for common issues related to the hydraulic system, engine, undercarriage, and upperstructure. The manual is intended for mechanics, owners with basic mechanical skills, and independent auto service professionals, ensuring that all users can effectively keep their equipment in optimal working condition.