This Operation & Maintenance Manual provides comprehensive guidance for the Komatsu WA800-3LC Wheel Loader, serial numbers A50001 and up. Engineered for demanding applications, this machine is built for reliability and performance, ensuring efficient operation in various work environments. The manual covers essential aspects of operating and maintaining your wheel loader to achieve peak performance through effective, economical, and safe machine operation and maintenance. This manual is designed to be an indispensable resource for owners, operators, and maintenance personnel. It details crucial information on operation, handling, lubrication, and maintenance procedures, including checking and adjustment guidelines. Safety is paramount, and the manual includes general precautions, operational safety rules, and specific maintenance safety measures. Furthermore, it offers insights into optional parts and attachments, such as the auto greasing system, and provides guidance on selecting appropriate buckets and tires, ensuring your WA800-3LC is equipped for optimal productivity.