The Hyundai HL770-7A Wheel Loader is a robust piece of heavy equipment engineered for demanding construction and material handling applications. Featuring a powerful Cummins QSM11 diesel engine producing approximately 260 HP and a 10.8-liter displacement, this 4WD machine is designed for reliability and efficiency in challenging environments such as construction sites, quarries, and industrial settings. Its articulated frame steering, with an approximate 40-degree articulation angle, enhances maneuverability, while the substantial operating weight of around 23,500 kg and a bucket capacity of 3.5 to 4.5 m³ underscore its capacity for significant work. This Workshop Service Repair Manual provides comprehensive guidance for maintaining and repairing the Hyundai HL770-7A Wheel Loader. It covers essential information including detailed maintenance procedures, troubleshooting diagnostics, technical specifications, and critical safety guidelines. Owners, mechanics, and technicians will find the detailed instructions invaluable for ensuring the optimal performance, longevity, and safe operation of this heavy equipment, facilitating effective service and repair across all its systems.