This manual covers the Komatsu WA250-1LC Wheel Loader, serial number A65001 and up. This heavy equipment is engineered for demanding operational environments, emphasizing reliability and efficient performance. Its design is focused on providing robust functionality for tasks such as maintaining, assembly, disassembly, and servicing, ensuring effective, economical, and safe machine operation. This comprehensive English language Service Repair Manual and Operation & Maintenance Manual provides detailed guidance for all aspects of the WA250-1LC. It includes in-depth sections on the engine, power train, steering system, brake and air system, work equipment system, and the electric and electronic system. Furthermore, it covers operational procedures, routine maintenance schedules, and essential specifications, empowering owners and technicians to effectively manage and repair the equipment.