This manual covers the Komatsu WA900-3LC Wheel Loader, serial number A50001 and up. Engineered for demanding tasks, this robust machine is designed for maintaining, assembling, disassembling, and servicing heavy-duty operations. Its construction prioritizes reliability and peak performance, ensuring efficient and safe operation across various applications. This comprehensive English-language documentation provides detailed guidance for owners, mechanics, and technicians. It includes Service Repair, Field Assembly, and Operation & Maintenance manuals, offering in-depth information on testing, troubleshooting, disassembly, assembly, lubrication, and adjustments. With extensive diagrams, illustrations, and schemes, this manual is an essential resource for understanding and maintaining the WA900-3LC Wheel Loader.