This manual covers the DAEWOO DOOSAN DX255LC-3 (DIEU EXP) Crawler Excavator. Designed for demanding construction and earthmoving applications, this excavator combines robust engineering with advanced operational capabilities. Its reliable performance and durable construction make it a valuable asset for professionals seeking efficiency and longevity in their heavy equipment. The purpose of this manual is to provide comprehensive guidance for the maintenance and repair of the DAEWOO DOOSAN DX255LC-3 (DIEU EXP) Crawler Excavator. It details essential information for owners, operators, and service technicians, including parts identification, technical specifications, and recommended service procedures. Utilizing this manual will ensure the optimal performance and extended service life of your equipment.