This Service Repair Manual covers Komatsu WA450-6 and WA480-6 wheel loaders, identified by serial numbers 66001 and up for the WA450-6 and 85001 and up for the WA480-6. These machines are engineered for demanding operational environments, featuring robust construction and reliable performance characteristic of Komatsu equipment. The KA SPEC. designation indicates specific configurations designed for optimal functionality and efficiency in various industrial and construction applications. This manual provides comprehensive information essential for the maintenance, repair, and servicing of your Komatsu wheel loader. It includes detailed sections on specifications, structure and function, standard value tables, testing and adjustment procedures, troubleshooting common issues, disassembly and assembly instructions, maintenance standards, and diagrams. By utilizing the information within this guide, owners, mechanics, and technicians can ensure the longevity, optimal performance, and safe operation of their WA450-6 and WA480-6 machines.