This Workshop Service Repair Manual provides comprehensive information for the Komatsu WA270-3 and WA270PT-3 Wheel Loaders, serial numbers WA270H20051 and up, and WA270H30051 and up. Engineered for demanding industrial and construction material handling applications, these heavy equipment units are powered by efficient diesel engines and feature robust 4-wheel drive systems. The Komatsu WA270 series is recognized for its operational reliability and suitability for a wide range of material handling tasks, ensuring productivity and performance in challenging environments. This manual serves as an essential resource for maintaining and repairing your Komatsu wheel loader. It covers critical areas including safety procedures, general information, detailed explanations of structure and function, precise testing and adjusting methods, and step-by-step disassembly and assembly instructions. By providing clear guidance and technical specifications, this document empowers owners, mechanics, and technicians to perform effective maintenance, troubleshoot issues, and ensure the longevity and optimal performance of their equipment.