 the emd f9 was a  diesel-electric locomotive produced between february 1953 and may 1960 by the electro-motive division of general motors (emd) and general motors diesel (gmd). it succeeded the f7 model in gm-emd's f-unit sequence. final assembly was at gm-emd's la grange, illinois plant. the f9 was also built in canada by general motors diesel at their london, ontario plant. a total of 100 cab-equipped lead a units and 154 cabless booster b units were built. the f9 was the fifth model in gm-emd's highly successful "f" series of cab unit diesel locomotives. a f9 can be distinguished reliably from a late f7 only by the addition of an extra filter grille ahead of the front porthole on the side panels on a units. internally, the use of an 567c prime mover increased power to 1,750&nbsp;hp from the f7's 1,500&nbsp;hp. by the time cab units such as the f9 were built, railroads were turning to the road switcher-style of locomotive, and the f9 was succeeded in most part by the emd gp9. == engine and powertrain == the f9 used a 16 cylinder 567c series diesel engine developing  at 800 rpm. the 567 was designed specifically for railroad locomotives, a supercharged 2 stroke 45 degree v type with  displacement per cylinder, for a total of . a d.c. generator powered four traction motors, two on each blomberg b truck. emd has built all of its major components since 193
B-B_locomotives Diesel_locomotives_of_the_United_States Electro-Motive_Diesel_locomotives General_Motors_Diesel_locomotives Locomotives_with_cabless_variants Railway_locomotives_introduced_in_1954 Standard_gauge_railway_locomotives