This manual covers the Daewoo Doosan DX255LC-3 (DI EXP) Crawler Excavator, a robust machine engineered for demanding construction and earthmoving applications. Built with a focus on durability and operational efficiency, this excavator is designed to deliver reliable performance in challenging environments. Its advanced features and solid construction ensure it meets the rigorous standards expected of heavy-duty equipment, making it a valuable asset for any professional operation. The purpose of this manual is to provide comprehensive guidance for the maintenance and servicing of your Daewoo Doosan DX255LC-3 (DI EXP) Crawler Excavator. It details essential procedures, technical specifications, and troubleshooting information to assist owners, operators, and technicians in keeping the equipment in optimal working condition. By following the instructions within this guide, users can ensure the longevity and peak performance of their excavator.