This Service Repair Manual covers Komatsu Wheel Loaders, models WA65-5, WA70-5, and WA80-5, for serial numbers H50051 and up. These machines are engineered for heavy-duty applications, embodying Komatsu's commitment to robust construction and reliable performance. Designed for efficiency and durability in demanding work environments, these wheel loaders are built to tackle a wide range of tasks, making them essential equipment for construction, material handling, and various industrial operations. This comprehensive manual is designed to assist both do-it-yourself enthusiasts and experienced mechanics in maintaining and repairing these Komatsu wheel loaders. It provides detailed information on safety procedures, general operations, structure and function, testing and adjusting, and disassembly and assembly. With easy-to-follow, step-by-step instructions, high-quality diagrams, and clear text, this English-language manual is an indispensable resource for ensuring the optimal performance and longevity of your equipment.