The KLW SE10B is a low-emissions diesel switcher locomotive built by Knoxville Locomotive Works. It is powered by a single MTU Series 2000 engine which develops a total power output of 1,050 horsepower (783 kW). There have been three SE10B locomotives produced for New York New Jersey Rail, and a 5 have been produced for Chevron to be used in the refineries of Houston and Beaumont-Port Arthur, Texas.