This service repair shop manual covers the Komatsu WA270-3 and WA270PT-3 wheel loaders, designed for demanding operational environments. These machines represent Komatsu's commitment to robust engineering and reliable performance in heavy-duty applications. This manual is intended to provide comprehensive information for the repair and maintenance of these specific wheel loader models, ensuring their continued efficiency and longevity in various work settings. The purpose of this manual is to serve as an authoritative resource for owners, mechanics, and technicians. It details essential procedures, including safety precautions, general information, structure and function explanations, testing and adjusting guidelines, and disassembly and assembly processes. By following the instructions within this document, users can effectively maintain and repair their Komatsu WA270-3 and WA270PT-3 wheel loaders, addressing a wide range of service needs.