The Hyundai Heavy Industry HL770-9 is a robust wheel loader designed for demanding operational environments. Equipped with a powerful Cummins QSB6.7 diesel engine, this 9 Series model delivers 164 kW (220 HP) and 810 Nm of torque, ensuring ample power for heavy-duty tasks. Its electronic powershift transmission with 4 forward and 4 reverse gears, combined with a substantial operating weight of 21,500 kg, provides stability and efficiency. Notable features include a maximum dump height of 2,890 mm and a rated operating capacity of 10,000 kg, making it a versatile machine for construction, material handling, and other industrial applications.

This service manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Hyundai Heavy Industry HL770-9. It covers essential information such as detailed specifications for the engine, transmission, and hydraulic systems, including capacities and pressures. The manual also outlines crucial maintenance procedures, lubrication requirements, and recommended service intervals for filters and fluids. Safety guidelines and troubleshooting advice are included to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the equipment.