The Komatsu WA450-3MC Wheel Loader is a robust piece of equipment designed for demanding operational environments. Built with Komatsu's renowned engineering quality, this model emphasizes reliability and efficiency in its class. Its intended usage spans various heavy-duty applications, where its performance and durability are critical for productivity. This specific machine series is identified by serial numbers A31001 and up, and A35001 and up. This Factory Service Repair Manual, provided in English, serves as a comprehensive guide for maintaining and repairing the Komatsu WA450-3MC. It covers essential areas including general information, structure, function, testing, adjusting, disassembly, assembly, and maintenance standards. The manual features detailed repair procedures with substeps, notes, cautions, and warnings, supported by all necessary illustrations, diagrams, and photos. An advanced troubleshooting guide and electrical system diagnostics with wiring diagrams are also included, making it an invaluable resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the equipment.