This Service Repair Manual covers the Komatsu WA600-3 and WA600-3D (TBG SPEC.) wheel loaders, serial numbers 50001 and up. These Avance Wheel Loaders are engineered for demanding operational environments, reflecting Komatsu's commitment to robust construction and reliable performance. The WA600-3 series is designed to provide efficient and powerful material handling capabilities, making it a valuable asset for various construction and industrial applications. This manual provides comprehensive guidance for the service and repair of these wheel loaders. It details essential procedures and information, including general overviews, structure and function explanations, testing and adjusting protocols, disassembly and assembly instructions, maintenance standards, and other critical data. This resource is intended to assist owners, mechanics, and technicians in effectively maintaining and repairing their Komatsu WA600-3 series wheel loaders, ensuring optimal operational efficiency and longevity.