This Service Repair Workshop Manual provides comprehensive information for the Komatsu WA120L-3MC Wheel Loader, serial numbers 54104 and up. Engineered for reliability and performance, this model is designed to meet the demanding requirements of various industrial and construction applications. Its robust construction and advanced engineering ensure efficient operation and longevity, making it a trusted choice for heavy-duty tasks. This manual serves as an essential resource for maintaining and repairing your Komatsu WA120L-3MC. It covers critical areas including general information, structure and function, testing and adjusting procedures, disassembly and assembly instructions, and maintenance standards. By following the detailed guidance within this English-language document, owners, mechanics, and technicians can effectively ensure the optimal performance and longevity of their equipment.