This Service Repair Workshop Manual provides comprehensive information for the Komatsu WA500-3H Wheel Loader, covering serial numbers WA500H20051 and up. Engineered for demanding operational environments, this robust machine features a powerful Komatsu SAA6D125E-2 engine, a versatile Komatsu Hydro-Shift Transmission with 4 forward and 4 reverse gears, and a substantial operating weight of approximately 45,000 kg. Its design prioritizes reliability and efficiency, making it a dependable asset for heavy-duty material handling tasks. This manual serves as an essential resource for maintaining and repairing your Komatsu WA500-3H Wheel Loader. It details critical procedures across various sections, including general information, structure and function, testing, adjusting, troubleshooting, disassembly, assembly, and maintenance standards. With clear instructions and technical specifications, this English-language guide empowers owners, mechanics, and technicians to ensure optimal performance, longevity, and safety of the equipment.