This Service Repair Manual covers the Komatsu WA-5 Series, specifically the WA65-5, WA70-5, and WA80-5 models. These machines are engineered for robust performance and reliability in demanding operational environments. While specific production years are not detailed, the WA-5 Series represents a significant advancement in Komatsu's commitment to providing durable and efficient equipment for various industrial and construction applications. The purpose of this comprehensive English-language manual is to provide detailed guidance for diagnosing, repairing, and maintaining your Komatsu equipment. It includes essential information such as specifications, diagrams, photo illustrations, and schemes, organized into key sections covering safety, general information, structure and function, testing and adjusting, disassembly and assembly, and other critical areas. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure optimal performance and longevity of their WA-5 Series machines.