This manual covers the Komatsu WA450-5L and WA480-5L Wheel Loaders, designed for efficient and safe operation in various demanding environments. These machines are engineered for reliability and performance, incorporating advanced features such as ECSS and Load Meter Supplement, Torque Converter Lock-up, Waste Handler Engine Cooling Fan Control System, Handling Joystick Steering System, and an Auto-Greasing System. The robust construction and thoughtful design ensure effective and economical operation, making them a valuable asset for any heavy-duty application. This comprehensive Service Repair Manual and Operation & Maintenance Manual provides detailed guidance for owners, mechanics, and technicians. It covers essential areas including lubrication, maintenance schedules, inspection procedures, troubleshooting charts, repair and servicing techniques, and technical specifications. With clear illustrations, diagrams, and schemes, this manual facilitates effective and safe machine operation, maintenance, assembly, and disassembly, ensuring the longevity and optimal performance of your Komatsu Wheel Loader.