This manual covers the Hitachi Zaxis 280LCN-3 excavator, a robust piece of heavy machinery designed for demanding construction and earthmoving applications. Engineered for reliability and performance, this diesel-powered excavator features a Hino J07E-T engine producing approximately 147 kW (197 hp) and a sophisticated hydrostatic transmission. Its substantial operating weight of around 27,500 kg and a length with bucket of approximately 10.5 meters underscore its capability for significant workload. The Zaxis 280LCN-3 is built to meet Tier 3 / Stage III emission standards, reflecting a commitment to both power and environmental consideration. The purpose of this Service Repair Workshop Manual is to provide comprehensive guidance for the maintenance, repair, and technical understanding of the Hitachi Zaxis 280LCN-3 excavator. It details essential procedures, from routine lubrication and filter changes with specified intervals to in-depth troubleshooting and technical specifications for its engine, hydraulic system, and undercarriage. This manual serves as an indispensable resource for owners, mechanics, and technicians, ensuring the longevity, optimal performance, and safe operation of the equipment through accurate and detailed information.