The Hitachi Zaxis 240 LC 3 is a robust excavator from the Zaxis 3 Series, engineered for demanding construction and earthmoving applications. It features a powerful 6.7-liter diesel engine, likely a Cummins QSB6.7, delivering approximately 165 horsepower, coupled with a hydrostatic transmission utilizing planetary gear reduction for efficient power transfer. Its substantial operating weight of around 23,900 kg and impressive digging depth of up to 6,660 mm make it a versatile machine for various heavy-duty tasks. This excavator is designed for reliability and performance in challenging environments. This workshop service repair manual provides comprehensive guidance for the Hitachi Zaxis 240 LC 3. It covers essential maintenance procedures, including lubrication specifications for engine and hydraulic systems, filter replacement details, and troubleshooting common issues. Technical specifications, such as engine details, transmission type, and operational dimensions, are included to aid in understanding the machine's capabilities. This manual is an indispensable resource for owners, operators, and technicians seeking to maintain the optimal performance and longevity of their excavator.