The Komatsu WA900-3 Wheel Loader is a robust and reliable machine designed for heavy-duty applications. Engineered for exceptional performance and durability, this model features advanced systems such as the Auto Shift System, Joystick Steering System, and an Auto-Greasing System, contributing to its operational efficiency and ease of use. With a focus on quality construction and user-centric design, the WA900-3 is built to meet the demanding requirements of various industrial and construction environments. This comprehensive manual provides essential information for the operation, maintenance, and repair of the Komatsu WA900-3 Wheel Loader, covering serial numbers 50001 and up. It includes detailed guidance on field assembly, operational procedures, safety precautions, and troubleshooting. Furthermore, the manual offers in-depth maintenance coverage, including a maintenance schedule, wear parts list, lubrication guidelines, standard tightening torques, and procedures for replacing safety-critical parts. Technical specifications, information on optional parts and attachments, and details on special systems are also provided to ensure optimal performance and longevity of the equipment.