This manual covers the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 520 LCH 3 CLASS. Designed for demanding applications, this excavator represents robust engineering and reliable performance. Its advanced features and construction ensure efficiency and durability in various operational environments. This comprehensive guide provides essential information for understanding and operating this powerful piece of machinery. The purpose of this service workshop manual is to provide detailed technical information for the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 520 LCH 3 CLASS. It includes extensive data on general information, fuel systems, chassis, cooling systems, engine components, clutch, lubrication, drive systems, transmissions, wheels, final drives, brakes, suspension, steering, frame, and electrical systems, including wiring diagrams. This resource is intended to assist technicians and mechanics in performing maintenance, repairs, and diagnostics, ensuring the optimal functioning and longevity of the equipment.