This Service Repair Workshop Manual provides comprehensive information for the Komatsu WA300-1 and WA320-1 Wheel Loaders, serial numbers 10001 and up. Engineered for demanding applications in construction and material handling, these heavy equipment units are designed for exceptional reliability and performance. This manual details the robust engineering and unique selling points that make these machines essential for efficient operations, covering all aspects necessary for their upkeep and optimal functioning in challenging environments. The purpose of this manual is to serve as an authoritative guide for owners, experienced mechanics, and do-it-yourself enthusiasts. It offers detailed instructions for complete disassembly of the machine, covering critical systems such as the engine, power train, steering, brake, work equipment, and electric/electronic systems. With easy-to-read text, high-quality diagrams, step-by-step instructions, and highly detailed exploded views, this English-language manual ensures that maintenance and repair tasks are performed accurately and efficiently, preserving the longevity and operational integrity of your Komatsu wheel loader.