Union Pacific
Union Pacific and Progress Rail Services Sign Agreement to Initiate First Testing of Green Technology in Intermediate-Haul Locomotives
OMAHA, Neb. — Union Pacific Railroad has signed an agreement with Progress Rail Services, a Caterpillar company, to test five SD40-2 locomotives originally built in the 1970’s that have been remanufactured with 3,005-horsepower low-emission diesel engines. These locomotives will meet Tier 2 emissions standards, incorporate new emission control technologies, and will be the first ever tested for intermediate-haul routes. The prototypes are powered by Caterpillar model 3516, 3005- horsepower diesel engines. They have more power than the typical 2000- horsepower 4-axle Genset “switch” locomotive used around terminals, but are less powerful than the 4400- horsepower 6-axle “line haul” locomotives used
