This Service Repair Manual covers the Komatsu WA270-7 Wheel Loader, serial numbers 80001 and up. Engineered for loading, carrying, and moving materials, this machine is built for heavy-duty construction and material handling applications. It features a Komatsu SAA6D107E-3 engine, a Komatsu Advanced Transmission with Lock-up, and a 4-wheel drive system, delivering robust performance and reliability. With an operating weight of 11,660 kg and a wheelbase of 2,900 mm, the WA270-7 is designed to meet demanding operational requirements. This comprehensive manual provides essential information for maintaining and repairing your Komatsu WA270-7 Wheel Loader. It includes detailed sections on specifications, structure and function, standard value tables, testing and adjusting, troubleshooting, disassembly and assembly, maintenance standards, diagrams, and drawings. Whether you are an owner, mechanic, or technician, this guide will assist you in understanding the machine's components and performing necessary service procedures, ensuring optimal performance and longevity.