The Hitachi Zaxis ZX240LC-3 is a robust construction machine engineered for demanding work environments. This model, part of the LC-3 generation, features a powerful Isuzu AH-4HK1X engine, a direct injection, water-cooled, 4-cycle diesel engine with a displacement of 5.193 L, delivering 120 kW (161 hp) of gross power. Its hydrostatic transmission ensures efficient power transfer for variable travel speeds, while its substantial operating weight of 23,700 kg and impressive digging capabilities, including a maximum digging depth of 6.61 m and a standard bucket capacity of 0.95 m³, highlight its suitability for heavy-duty excavation and material handling tasks. This comprehensive Workshop Service Manual, written in English, provides essential information for maintaining and repairing the Hitachi Zaxis ZX240LC-3. It covers a wide range of topics, including detailed engine specifications, hydraulic system parameters, fluid capacities, and maintenance intervals for critical components like engine oil and hydraulic filters. With 699 pages of detailed procedures, technical specifications, and troubleshooting guidance, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance, reliability, and longevity of the equipment.