This manual covers the Komatsu WA1200-6 Wheel Loader, serial numbers 60001 and up. Engineered for demanding heavy-duty applications, this machine is built with robust construction and advanced technology to ensure exceptional performance and reliability. Its powerful Komatsu SDA12E4 diesel engine, delivering 433 kW (581 HP) of gross power, coupled with a 4-speed automatic planetary gear transmission, provides efficient operation for large-scale material handling. With an impressive operating weight of 99,500 kg and a rated bucket capacity of 10.5 m³, the WA1200-6 is designed for maximum productivity in quarrying, mining, and large construction projects. The purpose of this English-language digital manual is to provide comprehensive information for the assembly, maintenance, and repair of the Komatsu WA1200-6 Wheel Loader. It details critical technical specifications, including engine and transmission data, fluid capacities, and dimensional information. Furthermore, it outlines essential maintenance procedures, troubleshooting guides, and safety protocols. This resource is invaluable for owners, operators, and service technicians seeking to ensure the optimal performance, longevity, and safe operation of their equipment through accurate and detailed guidance.