This manual covers the Komatsu WA65-3 Wheel Loader, serial number range HA940171 and up. Designed for efficiency and reliability, this machine embodies robust engineering for demanding operational environments. Its intended usage spans various applications requiring powerful and dependable material handling capabilities. This Operation & Maintenance manual provides comprehensive guidance for the Komatsu WA65-3. It details essential procedures for operation, handling, lubrication, maintenance, checking, and adjustment, aiming to achieve peak performance through effective, economical, and safe machine use. The manual includes sections on troubleshooting, technical data, and service intervals, serving as an indispensable resource for owners, mechanics, and technicians.