This Service Repair Workshop Manual covers the Komatsu WA800-3 Avance Wheel Loader, serial numbers 50001 and up. Engineered for demanding applications, this robust machine features a powerful Komatsu SAA6D170E-3 engine delivering 476 gross horsepower and meeting Tier 3 / Stage IIIA emission standards. Its advanced planetary gear type, full powershift transmission with four forward and four reverse gears, combined with a standard bucket capacity of 5.3 m³ and a straight towing capacity of 26,700 kg, ensures exceptional performance and productivity in heavy-duty operations. The WA800-3 Avance is designed for reliability and efficiency in construction, mining, and material handling environments. This manual provides comprehensive guidance for the maintenance, repair, and servicing of your Komatsu WA800-3 Avance Wheel Loader. It includes detailed procedures for all major systems, from engine and transmission to hydraulics and chassis. Essential technical specifications, fluid capacities, filter information, and lubrication charts are readily available to assist owners, mechanics, and technicians in performing routine maintenance and troubleshooting complex issues. The information contained within this manual is crucial for ensuring the longevity, optimal performance, and safe operation of the equipment.