This factory shop manual covers the Komatsu WA120L-3mc Wheel Loader, serial number 54104 and up. Engineered for reliability and efficiency, this machine is designed for demanding work environments. This comprehensive guide provides detailed information to ensure optimal performance and longevity of your equipment, reflecting Komatsu's commitment to quality and advanced engineering. This 668-page English-language manual is your essential resource for maintaining and repairing the WA120L-3mc. It features easy-to-read text, high-quality diagrams, and step-by-step instructions for fault finding, repair, and overhaul. Included are detailed specifications, tolerances, and explanations of component and system functions, all designed to save time and avoid errors during service.