This Service Shop Repair Manual covers the Komatsu WA120L-3MC Wheel Loader, designed for robust performance in demanding operational environments. Built with Komatsu's renowned engineering for reliability and efficiency, this machine is a valuable asset for various construction and material handling tasks. Its durable construction and advanced operational features ensure productivity and longevity, making it a preferred choice for professionals seeking dependable heavy equipment. This comprehensive manual provides detailed information essential for the maintenance and repair of your Komatsu WA120L-3MC. It includes complete step-by-step repair procedures, troubleshooting guides, technical specifications, and maintenance standards, supported by clear diagrams, actual photo illustrations, and schemes. The manual is organized into logical sections covering general information, structure and function, testing and adjusting, disassembly and assembly, and maintenance standards, empowering owners and technicians to keep the equipment in optimal working condition.