The Komatsu WA270-3 and WA270PT-3 Wheel Loaders are robust pieces of heavy equipment designed for demanding industrial and construction applications. Engineered for reliability and performance, these diesel-powered, 4-wheel drive machines are built to handle a wide range of tasks with efficiency. Their construction reflects Komatsu's commitment to quality, ensuring durability and optimal operational uptime in challenging environments. This Service Repair Workshop Manual provides comprehensive guidance for the maintenance and repair of the Komatsu WA270-3 and WA270PT-3 Wheel Loaders, covering serial numbers WA270H20051 and up, and WA270H30051 and up. It details essential procedures, including safety protocols, general information, structure and function analysis, testing and adjustment methods, and disassembly and assembly instructions. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the continued optimal performance and longevity of their equipment.