This manual covers the Komatsu WA380-3, a robust piece of equipment designed for demanding operational environments. Built with a focus on durability and performance, the WA380-3 is engineered to deliver reliable service across a range of applications. Its construction incorporates key components for efficient power transmission and ground engagement, ensuring productivity and longevity. This Service Repair Manual provides comprehensive guidance for the maintenance, diagnosis, and repair of the Komatsu WA380-3. It details procedures for engine components, transmission systems, hydraulic functions, and undercarriage parts, alongside information on electrical systems and operator interface elements. The manual is intended to assist owners, technicians, and mechanics in performing preventative maintenance, troubleshooting issues, and conducting restoration or rebuild tasks to ensure optimal vehicle performance and operational readiness.