This manual covers the Komatsu WA380-3LE Wheel Loader, serial number A50001 and up. Designed for demanding operational environments, this machine exemplifies Komatsu's commitment to robust engineering and reliable performance. Its intended use encompasses a wide range of tasks including maintenance, assembly, disassembly, servicing, operation, handling, lubrication, checking, and adjustment, making it a versatile asset for various industrial and construction applications. This comprehensive Service Repair Manual and Operation & Maintenance Manual provides essential information for the proper upkeep and operation of your Komatsu WA380-3LE. It details structure and function, testing and adjustment procedures, disassembly and assembly guidelines, and maintenance standards. Additionally, it includes crucial safety information, operation procedures, troubleshooting guides, maintenance schedules, and a fuel, coolant, and lubricant guide. This resource is designed to assist owners, mechanics, and technicians in ensuring the longevity and optimal performance of the equipment.