This Workshop Service Repair Manual is for the Komatsu WA400-5 Wheel Loader, a piece of heavy equipment designed for demanding operational environments. The WA400-5 is engineered for reliability and efficiency, offering robust performance for various industrial and construction applications. This manual provides comprehensive information to ensure the optimal functioning and longevity of your equipment. The purpose of this English-language manual is to guide users through the complete service and repair procedures for all models, engines, trims, and transmission types of the WA400-5. It covers A-Z service and repair, offering step-by-step instructions with accompanying pictures to facilitate understanding. This resource is invaluable for owners, mechanics, and technicians seeking to maintain, diagnose, and repair their equipment, ultimately helping to save on repair costs and ensure the machine remains in peak condition.