The Komatsu WA450-3 Wheel Loader represents a robust and reliable piece of heavy machinery, engineered for demanding operational environments. This model, produced for the WA450-3 generation and identifiable by serial numbers A31001 and up (WA450-3MC) and A35001 and up (WA450-3MC), is designed to deliver consistent performance. Its construction, featuring a powerful Komatsu SAA6D125E-2 diesel engine with a displacement of 11.04 L and a gross power output of 235 HP, is complemented by the advanced Komatsu Advanced Transmission System (K-AT) for efficient power delivery. With an operating weight of approximately 23,400 kg and a bucket capacity ranging from 3.3 to 4.0 m³, the WA450-3 is well-suited for various material handling tasks. This factory service repair manual provides comprehensive guidance for the maintenance and repair of the Komatsu WA450-3 Wheel Loader. It covers essential areas including general information, system functions, testing procedures, adjustments, disassembly, assembly, and advanced troubleshooting. Detailed step-by-step instructions, accompanied by necessary illustrations, diagrams, and specifications, are included to assist owners and technicians. The manual also details maintenance standards, recommended lubricants, fluid capacities, and service intervals, along with electrical system diagnostics and wiring diagrams, empowering users to perform servicing effectively and potentially reduce labor costs.