This manual covers the Komatsu WA470-5H and WA480-5H wheel loaders, part of the WA-5H Series. These machines are engineered for demanding operational environments, emphasizing reliability and robust performance. While specific production years are indicated by serial number ranges starting from 50051, the focus remains on providing comprehensive information for these versatile heavy-duty equipment models. This Service Repair Manual and Operation & Maintenance Manual provides essential guidance for maintaining and repairing your Komatsu wheel loader. It details critical areas including safety protocols, general operation, system structures and functions, maintenance standards, testing and adjustment procedures, troubleshooting across various systems such as engine, transmission, and hydraulics, as well as disassembly and assembly instructions. With actual photo illustrations, diagrams, and schemes, this manual is designed to empower owners and technicians to achieve peak performance, ensure economical and safe operation, and facilitate self-repairs.