The Hitachi Zaxis 280LCN-3 is a robust Hydraulic Excavator from the Zaxis-3 Series, engineered for demanding construction and earthmoving applications. This model features a powerful Cummins QSB6.7 turbocharged diesel engine, delivering a net power of 143 kW (192 hp) and a displacement of 6.7 liters. Its design emphasizes reliability and operational efficiency, with a hydrostatic 2-speed travel system and a hydraulic transmission contributing to its versatile performance. The excavator boasts an operating weight of 27,800 kg and impressive digging capabilities, including a maximum digging depth of 6.61 meters and a standard bucket capacity of 1.43 m³, making it a capable machine for a wide range of projects. This Workshop Service Manual, written in English, provides comprehensive technical information for the Hitachi Zaxis 280LCN-3 Hydraulic Excavator. Spanning 699 pages, it is designed to assist mechanics and technicians in maintaining and repairing the equipment. Key areas covered include detailed engine specifications, transmission systems, hydraulic components, lubrication requirements, filter types, and performance data such as swing speed and travel speeds. The manual also outlines attachment specifications, including boom and arm lengths, bucket capacity, digging depth, and reach, ensuring users have the necessary knowledge to keep the Zaxis 280LCN-3 operating at peak performance and to address any service needs effectively.