This manual covers the Komatsu WA320-3 Wheel Loader, serial number A30001 and up. Engineered for robust performance and reliability, this machine is designed for demanding operational environments. Its intended use encompasses efficient and safe operation, handling, lubrication, maintenance, and adjustment to ensure peak productivity and longevity. The WA320-3 represents a commitment to quality construction and operational excellence in the heavy equipment sector. This comprehensive Operation & Maintenance Manual provides essential information for owners, operators, and service technicians. It details operational procedures, troubleshooting guides, maintenance schedules, and technical specifications necessary for the upkeep of the WA320-3. Covered topics include cold weather operation, long-term storage, use of fuels and lubricants, periodic replacement of critical parts, and standard tightening torques. Information on optional attachments, such as buckets, tires, air conditioning, the Electronic Control Suspension System (E.C.S.S.), and auto-greasing systems, is also included to facilitate complete machine management.