This manual covers the Komatsu WA270-3 and WA270PT-3 Wheel Loaders, designed for material handling, loading, and excavation. These machines represent robust engineering, built for reliability in demanding heavy equipment applications. This document details their operational features and technical specifications, providing essential information for understanding and utilizing these versatile machines effectively. The purpose of this comprehensive Shop Manual is to provide detailed guidance for the maintenance and repair of your Komatsu Wheel Loader. It includes step-by-step fault-finding instructions, repair and overhaul procedures, explanations of component functions, and all necessary specifications and tolerances. With easy-to-read text, top-quality diagrams, pictures, and illustrations, this manual is an indispensable resource for owners, mechanics, and technicians to ensure correct and efficient service.