This manual covers the Hitachi EX270LC-5 Excavator, designed for demanding operational environments. It provides comprehensive information for maintaining and repairing this robust piece of equipment. The EX270LC-5 is engineered for reliability and performance, suitable for a wide range of construction and earthmoving tasks. This service manual offers detailed instructions for all aspects of maintenance and repair. It includes operational principles, troubleshooting guides, system diagnostics, component operation, and performance testing. Furthermore, it details hydraulic and electrical circuits, harness information, and workshop procedures for the upper structure, undercarriage, front attachment, and engine. This resource is intended for both do-it-yourself enthusiasts and professional technicians, enabling efficient and accurate upkeep of the Hitachi EX270LC-5 Excavator.