This service manual covers the DOOSAN WHEELED EXCAVATOR SD 200, serial numbers 1001 and up, manufactured to meet Tier II emissions standards. Designed for heavy-duty applications, this wheeled excavator embodies robust engineering and reliability, making it a trusted choice for demanding operational environments. Its construction and components are built for durability and performance in various work settings. This comprehensive manual provides detailed information essential for the maintenance, repair, and troubleshooting of your DOOSAN WHEELED EXCAVATOR SD 200. It includes sections on safety, general maintenance procedures, standard torques, and in-depth coverage of the upper and lower structures, engine, drivetrain, and hydraulic and electrical systems. With step-by-step instructions, detailed illustrations, and diagnostic guidance, this manual is an indispensable resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the machine.