The Komatsu WA380-1 Wheel Loader, designed for robust performance and reliability, is a testament to advanced engineering. This machine, identified by serial numbers 10001 and up, is equipped with the SA6D110-1 engine and is intended for demanding operational environments where efficiency and durability are paramount. Its construction emphasizes quality, ensuring consistent output and longevity in various industrial and construction applications. This comprehensive manual provides essential guidance for the Komatsu WA380-1 Wheel Loader. It encompasses detailed information for service and repair, covering engine, power train, steering, brake, air, work equipment, and electrical systems, along with general troubleshooting. The operation and maintenance sections offer instructions on safe and economical operation, periodic maintenance, adjustments, and fluid specifications. This resource is designed to assist owners, operators, and technicians in maintaining the optimal performance and extending the service life of the WA380-1.