This Service Repair Manual covers the Komatsu WA400-5 Wheel Loader, serial number 70001 and up. Designed for robust performance in demanding environments, the WA400-5 is engineered for reliability and efficiency. Its advanced features and durable construction make it a valuable asset for a wide range of industrial and construction applications, ensuring consistent operation and productivity. This comprehensive manual provides detailed information essential for maintaining and repairing your Komatsu WA400-5. It includes general information, structure and function explanations, testing and adjusting procedures, disassembly and assembly instructions, and maintenance standards. With easy-to-follow, step-by-step instructions, top-quality diagrams, and high-resolution graphics, this manual is an indispensable resource for both do-it-yourself enthusiasts and experienced mechanics seeking to keep their equipment in optimal working condition.