This manual covers the Komatsu WA250-3, a robust machine designed for efficient operation and maintenance. Built with engineering quality and reliability in mind, the WA250-3 is suited for various demanding tasks. Its design prioritizes effective performance, aiming to provide economical and safe usage across its operational life. This guide is essential for understanding and maximizing the capabilities of your Komatsu equipment. The purpose of this Operation & Maintenance Manual is to provide comprehensive information for the effective, economical, and safe operation and maintenance of the Komatsu WA250-3, serial numbers 50001 and up. It details machine controls, safety precautions, special operating conditions, and maintenance procedures, including lubrication and a wear parts list. Technical specifications, troubleshooting guidance, and information on optional parts and attachments are also included, ensuring that owners and technicians have the necessary knowledge to maintain and repair the vehicle.