The Hitachi ZX240-3 is a robust excavator from the ZX-3 Series, engineered for demanding construction and earthmoving applications. This machine features a powerful diesel engine, available in either Cummins or Hitachi variants, with a displacement of approximately 6.7 liters, delivering around 125 kW (168 hp) of power. Its hydrostatic transmission allows for precise control with travel speeds up to 5.5 km/h, while its substantial operating weight of approximately 23,800 kg and impressive digging depth of up to 6.62 meters underscore its capability. The ZX240-3 is designed for reliability and efficiency in a wide range of operational environments. This Service Repair Workshop Manual provides comprehensive guidance for the Hitachi ZX240-3. It covers essential maintenance procedures, including detailed intervals and capacities for engine oil, hydraulic oil, and fuel filters, as well as fluid capacities for the engine and hydraulic system. Technical specifications for the engine, transmission, dimensions, and hydraulic system are included, alongside operational performance data such as maximum digging depth and reach. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain, troubleshoot, and repair the ZX240-3, ensuring its optimal performance and longevity.