The Hyundai Wheel Loader HL770-7A is a robust and reliable piece of heavy machinery engineered for demanding operational environments. Featuring a powerful Cummins QSL8.9-C260 diesel engine, this model delivers substantial gross power of 194 kW (260 hp) and a peak torque of 1085 Nm, ensuring efficient performance in various applications. Its design incorporates a ZF WG200 power shift transmission with 4 forward and 4 reverse gears, contributing to its operational versatility. With an operating weight of 23,300 kg and a bucket capacity of 3.5 m³, the HL770-7A is built for productivity and durability in construction, mining, and material handling tasks.

This service manual provides comprehensive guidance for the maintenance and repair of the Hyundai Wheel Loader HL770-7A. It covers essential procedures, technical specifications, and troubleshooting information necessary to keep the equipment in optimal working condition. Key areas detailed include scheduled maintenance intervals for engine oil, hydraulic oil, and transmission fluid, along with fluid capacities for the engine, hydraulic system, and cooling system. This manual is an indispensable resource for owners, operators, and service technicians aiming to ensure the longevity, performance, and safety of their HL770-7A wheel loader.