The Hyundai HL770-7 is a robust Wheel Loader engineered for demanding operational environments. Featuring a powerful Cummins QSB6.7 diesel engine producing up to 179 hp, it is designed for efficiency and reliability in various material handling tasks. Its substantial operating weight of 22,100 kg and a bucket capacity of 3.2 m³ make it well-suited for construction, mining, and industrial applications. The transmission is a ZF Powershift with 4 forward and 4 reverse gears, ensuring optimal power delivery and maneuverability across different terrains. This Service and Operating Manual provides comprehensive guidance for the Hyundai HL770-7 Wheel Loader. It covers essential operating procedures, detailed maintenance schedules including engine oil and air filter change intervals, and critical troubleshooting information. Technical specifications for the engine, transmission, dimensions, and hydraulic systems are included to support accurate diagnostics and repairs. This manual is an indispensable resource for owners, operators, and technicians seeking to maintain the peak performance and longevity of their equipment.