This manual covers the Doosan Daewoo DX480LC and DX520LC Hydraulic Excavator models. These excavators are engineered for robust performance and reliability in demanding operational environments. Designed for heavy-duty construction and earthmoving tasks, they represent a commitment to durable engineering and efficient operation. Their advanced hydraulic systems and sturdy construction ensure productivity and longevity across a wide range of applications. The purpose of this comprehensive service repair manual is to provide detailed information for the maintenance, repair, and troubleshooting of your Doosan Daewoo excavator. It includes essential technical specifications, step-by-step maintenance procedures, diagnostic guides, and safety instructions. This resource is invaluable for owners, technicians, and mechanics seeking to ensure optimal performance, longevity, and safe operation of the DX480LC and DX520LC models.