This manual pertains to the Komatsu WA380-3 and WA380-3LE series wheel loaders, designed for robust performance in demanding operational environments. While specific production years are not detailed, this guide covers serial numbers A50001 and up. The WA380-3 series is recognized for its engineering quality and reliability, offering features that enhance productivity and operational efficiency. This publication serves as a comprehensive resource for understanding and operating these powerful machines. The purpose of this Operation & Maintenance Manual is to provide essential information for the safe and efficient use of your Komatsu wheel loader. It details crucial aspects including general operation, component explanations, cold weather procedures, and long-term storage. The manual also includes vital maintenance schedules, lubrication recommendations, wear part identification, torque specifications, and procedures for replacing critical safety components. Furthermore, troubleshooting guidance and information on optional attachments and customization are provided, ensuring that owners, operators, and technicians have the necessary knowledge to maintain peak performance and longevity of the WA380-3 series.