A Crane tank (CT) is a steam tank locomotive with a crane fitted to it. A tank locomotive is a Steam locomotive that carries its own fuel and water on it instead of pulling it behind it in a tender. A railroad crane, ( crane car (US or breakdown crane (UK is a type of crane used on a railroad for one of three primary The crane may be fitted at the front, centre or rear of the locomotive and gives it a rather "top heavy" appearance.