The Hitachi ZX225USLC-3 is a robust excavator engineered for demanding construction and earthmoving applications. This model, part of the LC-3 generation, features a powerful Isuzu AA-6BG1T diesel engine, delivering approximately 123 kW (165 hp) of power, coupled with a hydrostatic transmission for efficient operation. Its design emphasizes reliability and performance, with a substantial operating weight of around 23,400 kg and a compact radius suitable for confined job sites. The machine is equipped with a ROPS/FOPS certified cab and pilot controls, prioritizing operator safety and comfort during extended use. This Service Repair Workshop Manual provides comprehensive guidance for the Hitachi ZX225USLC-3 excavator. It covers essential maintenance procedures, detailed troubleshooting steps, and critical technical specifications for all major systems, including the engine, hydraulics, and drivetrain. The manual is designed to assist owners, technicians, and mechanics in performing routine servicing, identifying and resolving issues, and ensuring the optimal performance and longevity of the equipment. Its detailed information supports effective upkeep and repair, contributing to the machine's continued operational efficiency.