The No. 3927 Track Cleaning Car is the only one of the small units that is not self-propelled. The motor in this unit drives the cleaning brush only. As such, this car would need to be pulled along the track by a strong engine. ORANGE body with BLACK lettering and came with two bottles, a brush and a wiper. This car is often found with these parts missing. Replacement parts are available, but the original bottles had "LIONEL" painted on them.