This workshop service repair manual covers the Komatsu WA480-5H and WA470-5H wheel loaders, part of the WA-5H Series. These machines are engineered for demanding work environments, featuring robust construction and reliable performance. The Komatsu SAA6D125E-2 diesel engine, with a displacement of 11.04 L, provides ample power for heavy-duty operations. Equipped with the Komatsu Advanced Transmission with Lockup (K-ATLS) and hydrostatic power steering, these loaders offer efficient and precise control. Their center articulation design enhances maneuverability, making them suitable for a wide range of material handling tasks. This comprehensive English-language manual, spanning approximately 1300 pages, is designed to assist owners, mechanics, and technicians in maintaining and repairing the WA480-5H and WA470-5H wheel loaders. It details essential maintenance procedures, including engine oil and hydraulic system servicing, along with troubleshooting guidance. Technical specifications, such as dimensions, operating weight, and brake system details, are provided to ensure accurate understanding and application. The manual covers specific serial number ranges, starting from WA470H50051 and WA480H50051 respectively, ensuring precise information for targeted service.