This manual covers the Komatsu WA500-1, a robust wheel loader designed for demanding operational environments. Built with Komatsu's renowned engineering quality and reliability, this machine is equipped with a powerful Komatsu 6D140-1 series diesel engine and a Powershift transmission. Its substantial operating weight of approximately 34,000 kg, coupled with dimensions suitable for heavy-duty work, makes it an ideal choice for construction, mining, and material handling applications. The articulated steering system and ROPS/FOPS cab further enhance its operational efficiency and operator safety. This comprehensive workshop manual and engine workshop manual provides essential information for maintaining and repairing the Komatsu WA500-1. It details critical maintenance procedures, including service schedules and fluid capacities for the engine, transmission, and hydraulic systems. The manual also offers guidance on troubleshooting common issues, component replacement, and technical specifications necessary for accurate diagnostics and repairs. Owners, mechanics, and technicians will find this resource invaluable for ensuring the optimal performance and longevity of their WA500-1 equipment.