This Service Repair Workshop Manual covers the Komatsu WA470-3 Avance and WA470-3H wheel loaders, built for demanding work environments. These machines are engineered for robust performance and reliability, featuring a powerful Komatsu S6D125E-2 diesel engine and an advanced Komatsu Hydro-Shift Transmission with electronic control. With a substantial operating weight and a standard bucket capacity of 3.8 m³, these loaders are designed for efficient material handling in construction, mining, and other heavy-duty applications. Their durable construction and advanced hydraulic system, utilizing a variable displacement piston pump, ensure consistent productivity and operational excellence. This comprehensive manual provides essential information for the maintenance, repair, and technical understanding of your Komatsu WA470-3 series wheel loader. It details critical maintenance procedures, including lubrication schedules and fluid capacities for the engine, transmission, and hydraulic systems. Furthermore, the manual offers in-depth troubleshooting guidance, technical specifications, and safety protocols to ensure the longevity and optimal performance of your equipment. Whether you are an owner, operator, or technician, this 975+ page guide in English is an indispensable resource for keeping your machine in peak operating condition.