This manual covers the Komatsu WA800-3E0 and WA900-3E0 Wheel Loaders, serial numbers 60001 and up, and 70001 and up, respectively. These machines are engineered for robust performance and reliability in demanding operational environments. Designed for heavy-duty tasks, their construction emphasizes durability and efficiency, making them essential equipment for various industrial and construction applications. The purpose of this Service Repair Workshop Manual is to provide comprehensive guidance for the maintenance, repair, and servicing of these Komatsu Wheel Loaders. It includes detailed information on specifications, structure, function, maintenance standards, testing and adjusting procedures, troubleshooting, disassembly and assembly, and diagrams. This manual is an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of the equipment.