This Service Repair Manual provides comprehensive information for the Komatsu WA800-3E0 and WA900-3E0 wheel loaders. These robust machines are engineered for demanding operational environments, offering exceptional reliability and performance. Designed for heavy-duty applications, their construction reflects Komatsu's commitment to quality and durability, ensuring efficient operation and longevity in various industrial and construction settings. This manual serves as an essential resource for owners, technicians, and mechanics. It covers a wide range of topics including detailed specifications, structure and function explanations, standard value tables, testing and adjusting procedures, troubleshooting guides, disassembly and assembly instructions, maintenance standards, and diagrams. The English language manual, spanning 1557 pages, is designed to facilitate effective maintenance and repair, ensuring the optimal performance and upkeep of your Komatsu wheel loader.