This Service Repair Workshop Manual provides comprehensive information for the Komatsu WA470-5H and WA480-5H Wheel Loaders, serial numbers WA470H50051 and up, and WA480H50051 and up. These heavy equipment machines are engineered for demanding operational environments, featuring robust diesel engines and four-wheel drive systems. The manual is designed to support the upkeep and proper functioning of these reliable vehicles, ensuring they perform optimally in various applications. The purpose of this manual is to guide users through the complete disassembly of the machine and to facilitate its maintenance. It covers essential areas including safety protocols, general operational principles, structure and function explanations, testing and adjustment procedures, and detailed disassembly and assembly instructions. With step-by-step guidance, supported by detailed exploded diagrams, this resource is invaluable for both do-it-yourself owners and experienced mechanics aiming to keep their Komatsu wheel loaders in peak working condition.