This manual covers the Komatsu WA450-5L and WA480-5L Galeo Wheel Loaders, designed for demanding applications in construction, material handling, and excavation. These heavy machinery units are engineered for reliability and performance, featuring diesel engines and 4WD drive systems. This service repair factory manual provides comprehensive information for these models, specifically for serial numbers WA450-5L-A36001 and up, and WA480-5L-A37001 and up. The purpose of this English-language manual is to guide users through the maintenance, repair, and troubleshooting of the Komatsu WA450-5L and WA480-5L Galeo Wheel Loaders. It details general information, structure and function, testing, adjusting, troubleshooting, and disassembly and assembly procedures. With step-by-step instructions, this manual empowers owners and technicians to perform necessary upkeep, leading to cost savings through self-repair and ensuring the continued optimal operation of the equipment.