The Komatsu WA150-5H Wheel Loader, designed for robust performance and reliability, is a versatile machine engineered to meet the demands of various operational environments. Its construction emphasizes durability and efficiency, making it a dependable choice for tasks requiring substantial material handling capabilities. This model, identified by serial numbers H50051 and up, represents Komatsu's commitment to quality and advanced engineering in the heavy equipment sector. This Operation & Maintenance Manual provides comprehensive guidance for the Komatsu WA150-5H Wheel Loader. It covers essential procedures for operation, handling, lubrication, maintenance, checking, and adjustment, all aimed at achieving peak performance and ensuring economical and safe machine operation. The manual includes detailed information on maintenance schedules and intervals, lubrication requirements, and checking and adjustment procedures, supported by numerous pictures and diagrams presented in a step-by-step format that is easy to follow for users of any skill level.