EMD SW7
      EMD SW7| _Cow_and_Calf_at_Riverside_Yard%2C_Baltimore_(22341847029).jpg)
 Baltimore and Ohio No.  9624 TR4 cow-calf set at Riverside Yard, Baltimore, in 1969 | 
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| | Performance figures | 
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 | Power output | 1,200 hp (895 kW) | 
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The EMD SW7 was a diesel switcher locomotive built by General Motors Electro-Motive Division between October 1949 and January 1951. It was powered by a V12 567A engine developing 1,200 horsepower (895 kW). 489 SW7 locomotives were produced. The majority of the SW7s were built by EMD Plant #3 in Cleveland, Ohio. In addition, 15 TR4 cow-calf paired sets were produced.
 Original buyers 
SW7
| Railroad | Quantity | Road numbers | Notes | 
|---|
| Arkansas and Louisiana Missouri Railway | 1 | 11 |  | 
| Atlantic Coast Line Railroad | 9 | 643–651 |  | 
| Central Railroad of New Jersey | 4 | 1080–1083 |  | 
| Charleston and Western Carolina Railway | 2 | 800–801 |  | 
| Chesapeake and Ohio Railway | 26 | 5214–5239 |  | 
| Chicago and Eastern Illinois Railroad | 6 | 126–131 |  | 
| Chicago and Eastern Illinois (Chicago Heights Terminal and Transfer Railroad) | 2 | 132–133 |  | 
| Chicago and Illinois Western Railroad | 3 | 101–103 |  | 
| Chicago, Burlington and Quincy Railroad | 20 | 9249–9268 | to Burlington Northern 115-134 | 
| Clinchfield Railroad | 6 | 350–355 |  | 
| Colorado and Southern Railway | 1 | 154 |  | 
| Conemaugh and Black Lick Railroad | 15 | 103–117 |  | 
| Cornwall Railroad | 3 | 120–122 |  | 
| Detroit and Toledo Shore Line Railroad | 3 | 116–118 |  | 
| Detroit Terminal | 1 | 116 |  | 
| Detroit, Toledo and Ironton Railroad | 5 | 920–924 |  | 
| Erie Railroad | 6 | 428–433 |  | 
| Great Northern Railway | 11 | 163–170, 11–13 | to Burlington Northern 135-145 | 
| Illinois Central Railroad | 50 | 9300–9319, 9400–9429 |  | 
| Kansas City Southern Railway | 10 | 1300–1309 |  | 
| Kansas City Southern Railway (Louisiana and Arkansas Railway) | 6 | 1310–1315 |  | 
| Lakeside and Marblehead Railroad | 1 | 12 |  | 
| Lehigh Valley Railroad | 5 | 220–224 |  | 
| Louisiana Midland Railway | 1 | 10 |  | 
| Louisville and Nashville Railroad | 22 | 2245–2266 |  | 
| Maine Central Railroad | 3 | 331–333 |  | 
| Milwaukee Road | 1 | 1646 | renumbered 623 | 
| Missouri Pacific Railroad | 5 | 9142–9146 |  | 
| Monessen Southwestern Railway | 1 | 21 |  | 
| Montour Railroad | 1 | 72 |  | 
| Nashville, Chattanooga and St. Louis Railway | 10 | 24–33 |  | 
| New York Central Railroad | 34 | 8851–8855, 8880–8897, 8911–8921 |  | 
| New York Central (Indiana Harbor Belt Railroad) | 40 | 8835–8850, 8856–8879 |  | 
| New York Central (Chicago River and Indiana Railroad) | 6 | 8898–8903 |  | 
| New York Central (Peoria and Eastern Railway) | 7 | 8904–8910 |  | 
| New York, Chicago and St. Louis Railroad (“Nickel Plate Road”) | 3 | 230–232 |  | 
| Northern Pacific Railway | 8 | 107–114 | to Burlington Northern same | 
| Pennsylvania Railroad | 48 | 8861–8868, 8871–8872, 9358–9395 |  | 
| Peoria and Pekin Union Railway | 5 | 406–410 |  | 
| Phelps Dodge Corporation (New Cornelia Branch Mine) | 1 | 6 |  | 
| Philadelphia, Bethlehem and New England Railroad | 4 | 31–34 |  | 
| River Terminal Railway | 2 | 61–62 |  | 
| Southern Railway (Alabama Great Southern Railroad) | 5 | 6505–6509 |  | 
| Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway) | 14 | 6060–6073 |  | 
| Southern Railway (Georgia Southern and Florida Railway) | 4 | 8200–8203 |  | 
| Southern Railway (New Orleans and North Eastern Railway) | 12 | 6852–6863 |  | 
| St. Louis Southwestern Railway (“Cotton Belt”) | 4 | 1054–1057 | renumbered 2200-2203 | 
| St. Louis-San Francisco Railway (“Frisco”) | 5 | 300–304 |  | 
| Texas and Pacific Railway | 4 | 1020–1023 |  | 
| Union Pacific Railroad | 25 | 1800–1824 |  | 
| Union Railroad | 4 | 571–574 |  | 
| Wabash Railroad | 8 | 355–362 |  | 
| Weyerhaueser Timber Company | 2 | 300–301 |  | 
| Woodward Iron Company | 2 | 50–51 | Built with 567B engines | 
| Youngstown and Southern Railway | 2 | 70–71 |  | 
| Total | 489 |  |  | 
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TR4
See also
 References