This manual covers the Hyundai HL780-3A Wheel Loader, a robust machine engineered for demanding operational environments. Designed for efficiency and reliability, this wheel loader is a key piece of equipment for various construction and material handling tasks. Its construction reflects a commitment to durable performance, ensuring it meets the rigorous standards expected in heavy-duty applications. This comprehensive Service Repair Manual provides essential information for maintaining and repairing the Hyundai HL780-3A Wheel Loader. It details the structure and function of critical systems including the powertrain, brake system, steering system, and work equipment. Furthermore, the manual offers guidance on operational checks, troubleshooting, disassembly and assembly procedures, and electrical system diagnostics, including component locations and circuit diagrams. Safety guidelines and general specifications are also included to support proper operation and maintenance.