The Komatsu WA900-3LC Wheel Loader is a robust piece of equipment designed for demanding operational environments. Engineered for reliability and performance, this model, identified by serial number prefixes A50001 and up, represents a significant advancement in heavy machinery. Its construction prioritizes durability and efficiency, ensuring it meets the rigorous requirements of various industrial and construction applications. This Operation & Maintenance Manual provides comprehensive guidance for the Komatsu WA900-3LC. It covers essential information for maximizing performance, ensuring economical and safe operation, and performing effective maintenance. Within its 296 pages, users will find detailed sections on general operation, controls, warning displays, meter functions, maintenance procedures including automatic lubrication systems, optional parts, bucket and tire selection, and critical safety precautions. The manual is presented in English and includes numerous illustrations to facilitate understanding for owners, mechanics, and technicians.