This manual covers the Komatsu WA50-3, a versatile machine designed for loading, digging, and material handling operations. Engineered for reliability and efficiency, the WA50-3 features a robust Powershift transmission and articulated frame steering, ensuring precise control in demanding environments. Its water-cooled engine and wet, multi-disc brake system contribute to its durable performance. The ROPS-equipped cab provides operator safety during operation. This comprehensive document serves as both a Shop Manual and an Operation & Maintenance Manual, providing essential information for the WA50-3 and related models, including the 82E and 98E Series Diesel Engines. It details critical maintenance procedures, troubleshooting guides, technical specifications, and safety protocols. By consulting this manual, owners, mechanics, and technicians can ensure the optimal performance, longevity, and safe operation of their Komatsu equipment.