 Shipped back in 1955, its engine was rebored to a larger size and slightly greater power output, then placed into storage.In 1969 it was reactivated and sent to the Vandenberg Air Force Base for service hauling supplies for the proposed Manned Orbiting Laboratory and components for Titan launch vehicles.Locomotive #1818 was fitted with European buffers and couplers very soon after delivery and sent to Europe for Army testing and training and secondarily as an EMD demonstrator.