This Operation & Maintenance Manual covers the Komatsu WA90-5 Wheel Loader, serial number H50051 and up. Engineered for robust performance in material handling, loading, and site preparation, this machine embodies Komatsu's commitment to reliability and operational efficiency. Its design prioritizes durability and productivity, making it a dependable asset for demanding work environments. This manual provides comprehensive guidance for the safe and effective operation, maintenance, and troubleshooting of your Komatsu WA90-5 Wheel Loader. It includes detailed information on safety procedures, operating guidelines, maintenance schedules, and technical data, along with troubleshooting assistance to address potential issues. This resource is essential for owners, operators, and technicians to ensure optimal performance and longevity of the equipment.