This manual covers the Komatsu WA900L-3 Wheel Loader, serial numbers 52001 and up. Engineered for demanding operational environments, this machine is built with Komatsu's renowned commitment to quality and reliability. Its robust design and powerful SAA12V140ZE-2 engine ensure efficient and effective performance in a variety of heavy-duty applications. This comprehensive guide is designed to support the machine's intended purpose of maintaining, assembling, disassembling, and servicing for economical and safe operation. The scope of this Service Repair Manual and Operation & Maintenance Manual is extensive, providing detailed information crucial for the upkeep of your Komatsu WA900L-3. It includes technical specifications, maintenance procedures, troubleshooting guidance, and safety protocols, all presented with clear diagrams, photos, and schemes. This resource empowers owners, mechanics, and technicians to perform necessary tasks, ensuring the longevity and optimal performance of the equipment while facilitating cost savings through self-maintenance.