This manual covers the Hitachi ZX250LCN-3, a robust excavator designed for demanding construction and earthmoving applications. Engineered for reliability and efficiency, this machine features a powerful diesel engine and a hydrostatic transmission with variable speed control, ensuring optimal performance across various tasks. Its substantial operating weight of approximately 25,000 kg, coupled with impressive digging capabilities, including a maximum digging depth of around 6.5 to 7.0 meters and a reach of up to 10.1 meters, makes it a versatile tool for significant projects. The ZX250LCN-3 is built to withstand rigorous use, offering consistent power and precise control for operators. This Service Repair Workshop Manual provides comprehensive guidance for the maintenance and repair of the Hitachi ZX250LCN-3. It details essential procedures for keeping the machine in optimal working condition, covering routine maintenance, fluid capacities, and service intervals. Technical specifications, including dimensions and performance data, are included to assist with diagnostics and operational understanding. This manual is an indispensable resource for owners, operators, and technicians, enabling them to perform necessary upkeep, troubleshoot issues effectively, and ensure the longevity and peak performance of their equipment.