This manual covers the Komatsu WA450-3MC Wheel Loader, a robust material handler designed for demanding operational environments. Engineered for reliability and efficiency, this model offers advanced features and robust construction, making it a valuable asset for various industrial and construction applications. Its sturdy build and performance capabilities are backed by Komatsu's commitment to quality and durability, ensuring consistent operation and productivity across its service life. This comprehensive Service Repair Manual and Operation & Maintenance Manual provides essential information for the WA450-3MC, covering serial numbers A31001 and up, and A35001 and up. It details crucial aspects including foreword, general information, structure and function, testing, troubleshooting, disassembly, assembly, maintenance standards, and other relevant sections. The manual also includes operation procedures, safety information, maintenance schedules, technical specifications, and guidance on options and attachments, serving as an indispensable resource for owners, operators, and technicians to ensure optimal performance and longevity of the equipment.