Locomotive 89, a 25 ton G.E. diesel-electric locomotive, was acquired by PTM in April 2006 after having been built in May 1953 for a machine tool manufacturing plant in south central Pennsylvania and later serving several owners, last at the AGWAY grain terminal in Philadelphia until 2001. PTM received it as a donation from Fifth Third Bank of Cincinnati, Ohio, and Keen Transport, Inc. of Carlisle, Pennsylvania, with transportation from Carlisle donated by Woolever Brothers Trucking Co. of Montoursville, Pennsylvania, and additional components and an overhauled power plant donated by Western Star Rail Service of Newark, Ohio. Typical of the 550 such locomotives produced by General Electric at Erie, Pennsylvania, it was intended, once overhauled and modified, to serve PTM as a shop switcher, rescue locomotive, and snowplow on the Broad Gauge trolley system. The 25 ton model was the smallest in General Electric's industrial locomotive line and was produced in numerous variations from 1938 to 1974, with this version among the more common examples built in large numbers in the early 1950s as steam locomotives were being displaced by more efficient diesels. Locomotive 89 is powered by a 15 HP Cummins diesel engine that drives a DC generator whose output goes to a DC traction motor geared to the rear axle, while the front axle is coupled to the rear by a roller chain and sprockets hidden under the frame. It is equipped with air brakes and air-operated window wipers, sanders, bell, and whistle, and the engine is started by a 32V set of batteries that turns the generator into an electric motor to crank the engine. When full of fuel and sand, it weighs just over 51,000 pounds, has a top speed of 20 mph because of double reduction gearing, and in normal industrial use could move up to 15 freight cars on level track, each weighing up to 286,000 pounds.