| Missouri Pacific Railroad RS3m 1077 at Saint Louis, Missouri on October 2, 1965, Kodachrome by Lou Schmitz, Chuck Zeiler collection. Number 1077 was built in February 1955 as MP RS3 4509 (c/n 80766), renumbered to 982 around 1961, rebuilt to what MP referred to as "EMCO" or more commonly, GP12. The rebuilding process utilized a used EMD 12-567A normally aspired prime mover from a retired E-unit, replacing the unreliable Alco 12 cylinder Model 244G turbocharged prime mover. The North Little Rock Shops also installed a custom three-stack exhaust mainfold and replaced Alco's mechanically-driven radiator fan with EMD electrically-driven fans. Almost 600 horsepower was lost in the conversion, however this was not a concern to MP, since the RS3m/GP12 locomotives were to be assigned as yard power. This unit was retired in December 1974 and traded to GE. |