This manual covers the Hitachi ZX240LC-3, a robust excavator from the ZX-3 Series. Engineered for demanding construction and earthmoving applications, this machine features a powerful 7.178 L diesel engine producing 120 kW (161 hp) and adhering to Tier 3 / Stage IIIA emission standards. Its hydrostatic transmission with variable 2-speed travel, coupled with an operating weight of 23,300 kg, ensures efficient and stable operation across various terrains. The ZX240LC-3 is designed for reliability and performance, offering a maximum digging depth of 6,730 mm and a reach of 9,940 mm, making it a versatile tool for extensive excavation projects. The purpose of this Service Repair Workshop Manual is to provide comprehensive information for the maintenance, repair, and servicing of the Hitachi ZX240LC-3. It details essential procedures, including engine oil and hydraulic filter replacement intervals, lubrication capacities, and technical specifications for the hydraulic system, undercarriage, and performance parameters. This manual is an indispensable resource for owners, technicians, and mechanics, enabling them to perform accurate diagnostics, routine maintenance, and complex repairs, thereby ensuring the longevity and optimal performance of the equipment.