This manual covers the Komatsu Wa900-3 Wheel Loader, a robust piece of heavy machinery designed for demanding tasks such as loading, excavation, and material handling. Engineered for reliability and performance, the Wa900-3 is built to withstand rigorous operational environments. Its advanced design incorporates features that enhance efficiency and operator comfort, making it a superior choice for construction and industrial applications. This comprehensive English language manual serves as an essential resource for the Komatsu Wa900-3 Wheel Loader, encompassing Service Repair, Field Assembly, and Operation & Maintenance information. It details critical procedures for maintenance, including scheduled tasks, wear parts, fluid specifications, and torque values. Furthermore, the manual provides extensive guidance on field assembly, troubleshooting common issues, and understanding the machine's structure and function. Owners, mechanics, and technicians will find this document invaluable for ensuring the optimal performance, longevity, and safe operation of their equipment.