This manual covers the Komatsu WA300-1 and WA320-1 Wheel Loaders, designed for demanding industrial and construction applications. These machines are engineered for robust performance and reliability, offering efficient operation and durability in various work environments. Their construction emphasizes longevity and operational excellence, making them a dependable choice for material handling and site preparation tasks. This comprehensive Shop Manual provides essential information for the repair, overhaul, and fault finding of these wheel loaders. It includes detailed technical specifications, step-by-step repair instructions, component function explanations, and listed tolerances, all supported by diagrams, illustrations, and pictures. This resource is indispensable for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their Komatsu WA300-1 and WA320-1 equipment.