Lima-Hamilton LT-2500, Class LS25 / LS25m

The Lima-Hamilton 2500 horsepower Transfer locomotive (sometimes referred to by its Specification Number, A-3177 or the railfan designation LT-2500) was a diesel-electric transfer-unit locomotive, built by the Lima Locomotive Works between 1950 and 1951. The LT-2500 was the final locomotive model produced by Lima-Hamilton before the company merged with the Baldwin Locomotive Works in 1951.

All twenty-two units were purchased by the Pennsylvania Railroad.