The Komatsu WA380-3 and WA380-3LE Wheel Loaders represent robust and reliable machinery designed for demanding operational environments. These models are engineered with a focus on durability and performance, featuring a powerful diesel engine, the Komatsu Advanced Transmission System (K-ATX), and a substantial operating weight of approximately 17,755 kg. With a standard bucket capacity of around 3.0 m³ and a static rated load of approximately 10,600 kg, they are well-suited for a wide range of material handling tasks in construction, mining, and industrial applications. The articulated hydrostatic power steering and wet, multi-disc braking system contribute to their operational efficiency and control. This comprehensive Service Shop Repair Manual provides essential information for the maintenance and repair of the Komatsu WA380-3 and WA380-3LE Wheel Loaders. Covering general information, structure and function, testing and adjustment, disassembly and assembly, and maintenance standards, this manual is an indispensable resource. It includes detailed step-by-step operations, actual photo illustrations, schemes, and diagrams to assist owners, mechanics, and technicians. Troubleshooting procedures are also included, empowering users to perform their own repairs, save costs, and ensure the longevity and optimal performance of their equipment.