This manual covers the Hyundai HL770-7A Wheel Loader, a robust piece of equipment designed for demanding operational environments. While specific production years are not detailed, the 7A generation signifies advanced engineering focused on reliability and performance. This wheel loader is built to handle a variety of heavy-duty tasks, leveraging its powerful Cummins QSB6.7 engine, known for its efficiency and durability. Its construction emphasizes quality and operational longevity, making it a valuable asset for construction, mining, and material handling applications. This comprehensive English-language repair and service manual provides essential information for maintaining and repairing the Hyundai HL770-7A. It includes detailed sections on the structure, function, troubleshooting, and repair of key systems such as the engine, powertrain, brake, steering, work equipment, and electrical systems. Technical specifications, safety guidelines, and operational checks are also included to ensure the machine operates at peak performance and safety standards. This manual is an indispensable resource for owners, operators, and technicians seeking to understand and maintain this powerful wheel loader.