This Operation Maintenance Manual provides comprehensive information for the Komatsu WA90-5 Wheel Loader. Engineered for demanding construction and material handling tasks, this robust machine is designed for efficiency and reliability in various operational environments. Its 4WD system and hydrostatic transmission ensure optimal performance and maneuverability. The WA90-5 is a testament to Komatsu's commitment to quality, offering a powerful diesel engine and a substantial operating weight of approximately 5,500 kg, making it a dependable choice for heavy-duty applications. This manual serves as an essential resource for owners, operators, and service technicians. It details critical operating procedures, routine maintenance schedules, and troubleshooting guidance to ensure the longevity and optimal performance of your WA90-5 Wheel Loader. Within these pages, you will find technical specifications, fluid requirements, and safety guidelines necessary for proper upkeep and repair. Adhering to the procedures outlined herein will help maintain the machine's efficiency and operational integrity throughout its service life.