This manual pertains to Komatsu WA30-5 and WA50-3 equipment, covering serial numbers from 22005 and up for the WA30-5, and 21450 and up for the WA50-3. These machines are engineered for demanding operational environments, emphasizing reliability and efficient performance. The comprehensive documentation provided aims to ensure optimal functioning and longevity of your Komatsu equipment. The purpose of this Operation & Maintenance Manual is to detail procedures for operation, handling, lubrication, maintenance, checking, and adjustment. It is designed to facilitate peak performance through effective, economical, and safe machine operation and maintenance. The manual includes extensive sections on safety precautions, operational guidance, troubleshooting, technical specifications, and a detailed maintenance schedule. With numerous illustrations and diagrams, it serves as an essential resource for owners, mechanics, and technicians to maintain and repair the equipment effectively.