This Service Repair Manual covers the Komatsu WA380-1 Wheel Loader, serial numbers 10001 and up. Engineered for demanding operational environments, the WA380-1 is recognized for its robust construction and reliable performance. This machine is designed to provide efficient material handling capabilities across a variety of applications, reflecting Komatsu's commitment to quality and durability in heavy equipment manufacturing. This comprehensive manual provides detailed information essential for the maintenance and repair of your Komatsu WA380-1. It includes complete step-by-step operations for assembly, disassembly, servicing, diagnosing, and troubleshooting across key systems such as the engine, power train, steering, brakes, work equipment, and electrical systems. With the inclusion of specifications, diagrams, photo illustrations, and schemes, this manual empowers owners and technicians to perform necessary upkeep and repairs, ensuring the continued optimal performance and longevity of the equipment.