The Hitachi Zaxis 280 LC 3 is a robust excavator engineered for demanding construction and earthmoving applications. This model, part of the LC 3 Series, features a powerful diesel engine, specifically the Cummins QSB6.7, displacing 6.7 liters and delivering approximately 150 kW (201 hp) of net power. Its hydrostatic swing and travel drive system, coupled with planetary gear reduction, ensures efficient and precise operation. With an operating weight ranging from approximately 27,000 to 29,000 kg, and impressive digging depths and reach capabilities, the Zaxis 280 LC 3 is designed for reliability and performance in challenging environments. This Workshop Service Repair Manual provides comprehensive guidance for the Hitachi Zaxis 280 LC 3. It covers essential maintenance procedures, including engine oil and hydraulic oil capacities, and outlines filter replacement intervals. Detailed technical specifications for the engine, hydraulic system, and undercarriage are included, alongside performance capabilities such as maximum digging depth and bucket capacity. This manual is an indispensable resource for mechanical technicians, offering the necessary information to maintain, troubleshoot, and repair the excavator effectively, ensuring its optimal performance and longevity.