This manual covers the Komatsu WA450-6 and WA480-6 (KA SPEC.) wheel loaders, designed for robust performance in demanding applications. These machines are engineered for reliability and efficiency, offering advanced features to enhance productivity and operator comfort. Serial numbers for the WA450-6 begin at 66001, and for the WA480-6 at 85001. This documentation is essential for understanding the full capabilities and operational requirements of these powerful wheel loaders. The purpose of this comprehensive Service Repair Manual and Operation & Maintenance Manual is to provide detailed guidance for maintaining, servicing, and operating your Komatsu wheel loader. It includes critical information on specifications, structure and function, testing and adjusting, troubleshooting, and disassembly and assembly procedures. Furthermore, it covers essential operational guidelines, safety precautions, maintenance schedules, and recommended fluids, ensuring peak performance and longevity of the equipment for owners, mechanics, and technicians.