This manual covers the Komatsu WA250-5 and WA250PT-5 Wheel Loaders, serial numbers 70001 and up. These machines are engineered for robust performance and reliability, featuring a SAA6D102E-2-A diesel engine and a hydrostatic transmission with variable gears. Designed for demanding operational environments, these wheel loaders are built to deliver efficient and safe operation, making them a valuable asset for various industrial and construction applications. This comprehensive English-language manual provides essential information for the effective, economical, and safe operation and maintenance of your Komatsu wheel loader. It includes detailed sections on general information, structure, function, maintenance standards, testing, adjusting, disassembly, and assembly. Additionally, it covers operation, safety guidelines, specifications, attachments, options, and troubleshooting guidance, empowering owners and technicians to perform DIY repairs and ensure optimal machine performance.