This Service Repair Manual covers the Komatsu WA150-5H. The WA150-5H is engineered for robust performance and reliability in demanding operational environments. Its design emphasizes durability and efficiency, making it a dependable choice for various industrial and construction applications. This manual is intended to provide comprehensive information for the proper operation and upkeep of this model. This manual serves as a complete guide for maintaining and repairing the Komatsu WA150-5H, specifically for serial numbers H50051 and up. It includes detailed sections on general information, structure and function, testing and adjusting, disassembly and assembly, and maintenance standards. The content is designed to assist owners, technicians, and mechanics in understanding the vehicle's systems, performing routine maintenance, and executing necessary repairs to ensure optimal performance and longevity.