This manual covers the Komatsu WA500-1L Wheel Loader, serial number A20854 and up. Designed for heavy equipment applications, the WA500-1L is engineered for reliability and performance in demanding operational environments. This comprehensive guide details its intended use, encompassing maintenance, assembly, disassembly, servicing, operation, and troubleshooting, ensuring optimal functionality and longevity of the machine. This Service Repair Manual and Operation & Maintenance Manual provides detailed information essential for the upkeep and repair of your Komatsu WA500-1L. It includes extensive coverage of the engine, power train, steering system, brake and air system, work equipment system, and electric/electronic systems, along with gear pump information and metric conversions. The Operation & Maintenance section offers guidance on safe operation, lubrication, general maintenance, and specifications, making it an indispensable resource for owners, mechanics, and technicians.