This Service Repair Manual covers the Hyundai HL780-3A Wheel Loader, a robust piece of equipment designed for demanding operational environments. Engineered for reliability and performance, the HL780-3A incorporates advanced features to maximize efficiency and productivity. Its construction and components are built to withstand rigorous use, making it a dependable choice for various heavy-duty applications. This comprehensive manual provides detailed information essential for the maintenance, repair, and troubleshooting of the Hyundai HL780-3A. It includes in-depth coverage of the power train, brake system, steering system, work equipment, and electrical system, featuring structure, function, operational checks, troubleshooting, and disassembly/assembly procedures. Technical specifications, safety guidelines, and maintenance tasks are also thoroughly explained, supported by clear diagrams and illustrations to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the vehicle.