This workshop service repair manual covers the HITACHI 250H-3, 250LC-3, and 250LCN-3 Hydraulic Excavator models. These excavators are engineered for robust performance and reliability in demanding construction environments. Their design prioritizes efficiency and durability, making them a trusted choice for heavy-duty excavation tasks. This manual provides comprehensive information to ensure these machines operate at their peak potential. The purpose of this manual is to serve as a complete guide for maintaining and repairing your HITACHI hydraulic excavator. It includes detailed procedures for all major systems, technical specifications, troubleshooting guidance, and essential safety information. By following the instructions within this manual, owners, mechanics, and technicians can effectively diagnose issues, perform routine maintenance, and execute complex repairs, thereby extending the service life and optimizing the operational performance of the equipment.