This document pertains to the Hitachi Zaxis ZX 270LC-3, a robust excavator engineered for demanding construction and earthmoving applications. Known for its reliable diesel engine and hydrostatic transmission, this model offers efficient power and precise control. Its substantial operating weight of approximately 26,500 kg, coupled with a versatile boom and arm configuration, makes it suitable for a wide range of tasks, from excavation to material handling. The LC-3 generation signifies advanced design principles focused on durability and operational performance in challenging environments. The purpose of this comprehensive workshop service manual is to provide detailed guidance for the maintenance, repair, and technical understanding of the Hitachi Zaxis ZX 270LC-3. It covers essential information including lubrication capacities, service intervals, and specifications for critical systems such as the engine, hydraulics, and undercarriage. This manual is an indispensable resource for owners, technicians, and mechanics, enabling them to perform routine maintenance, diagnose issues, and ensure the optimal performance and longevity of the equipment.