This shop manual covers the Komatsu WA800-2 loader, equipped with a 12V140-1 Series diesel engine. While specific production years are not detailed, this equipment is engineered for demanding operational environments. The manual focuses on providing comprehensive information to ensure the longevity and optimal performance of this heavy-duty machinery. This English-language shop manual serves as an essential resource for maintaining and repairing the Komatsu WA800-2 loader and its 12V140-1 diesel engine. It details critical maintenance procedures, troubleshooting guides, and technical specifications necessary for owners, mechanics, and technicians. The manual aims to facilitate efficient servicing and ensure the continued reliability of the equipment.