This Service Repair Manual covers Komatsu Wheel Loaders, models WA800-3E0 and WA900-3E0, for serial numbers WA800-3E0 starting from 70001 and WA900-3E0 starting from 60001. These machines are engineered for demanding operational conditions and are designed for both do-it-yourself tasks and professional mechanic applications. The manual provides comprehensive information to ensure the continued performance and longevity of your equipment. The purpose of this manual is to provide detailed guidance for the service and repair of your Komatsu Wheel Loader. It includes essential sections such as specifications, structure and function, maintenance standards, testing and adjusting procedures, troubleshooting, and disassembly and assembly instructions. With easy-to-follow, step-by-step instructions and accompanying diagrams, this resource is invaluable for maintaining your equipment in optimal working condition.