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Specifications
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover	EMD 12-567BA
Engine type	V12 diesel
Aspiration	Roots-type supercharger
Cylinders	12

Type and origin
Type and origin
Power type	Diesel–electric
Builder	General Motors Electro-Motive Division (EMD)
Model	SW7, TR4
Build date	October 1949 – January 1951
Total produced	SW7: 489; TR4: 15 sets

EMD SW7
EMD SW7
	Baltimore and Ohio No. 9624 TR4 cow–calf set at Riverside Yard, Baltimore, in 1969
Power type
Type and origin
Power type	Diesel–electric
Builder	General Motors Electro-Motive Division (EMD)
Model	SW7, TR4
Build date	October 1949 – January 1951
Total produced	SW7: 489; TR4: 15 sets
Configuration:;
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover	EMD 12-567BA
Engine type	V12 diesel
Aspiration	Roots-type supercharger
Cylinders	12
Power output
Performance figures
Power output	1,200 hp (895 kW)

The EMD SW7 was a diesel switcher locomotive built by General Motors Electro-Motive Division between October 1949 and January 1951.^[2] It was powered by a 1,200 horsepower (895 kW)12-567A engine.^[1] The SW7 replaced the earlier 1,000 horsepower NW2 switcher in EMD's catalog.^[3] A total of 489 SW7 locomotives were produced. The majority of the SW7s were built by EMD Plant #3 in Cleveland, Ohio.^{[citation needed]} In addition, 15 TR4 cow–calf paired sets were produced.^[3]

SW7 production was discontinued in 1951 in favor of the new SW9.^[2]

Original buyers

Railroad	Quantity	Road numbers
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
Chicago, Milwaukee, St. Paul and Pacific Railroad	1	1646
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 Railroad	1	116
Detroit, Toledo and Ironton Railroad	5	920–924
Erie Railroad	6	428–433
Great Northern Railway	11	163–170, 11–13
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
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
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
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
Youngstown and Southern Railway	2	70–71
Total	489

TR4

Railroad	Quantity	Road numbers
Atchison, Topeka and Santa Fe Railway	2 sets	2418,A–2419,A
Belt Railway of Chicago	5 sets	502AB–506AB
Chesapeake and Ohio Railway	2 sets	6001AB–6002AB
Chicago, Milwaukee, St. Paul and Pacific Railroad	6 sets	2001AB–2006AB
Total	15 sets

External links

Media related to EMD SW7 locomotives at Wikimedia Commons

References

^ ^a ^b Solomon, Brian (August 2014). GE and EMD Locomotives: The Illustrated History. Voyageur Press. p. 231. ISBN 978-0-7603-4612-9.
^ ^a ^b Schafer, Mike (1998). Vintage diesel locomotives. Osceola, WI: Motorbooks International. p. 25. ISBN 0-7603-0507-2. OCLC 38738930.
^ ^a ^b Marre, Louis A. (1995). Diesel locomotives : the first 50 years : a guide to diesels built before 1972. Waukesha, WI: Kalmbach Pub. Co. pp. 30–31. ISBN 0-89024-258-5. OCLC 34531120.

* Kristopans, Andre J. http://utahrails.net/ajkristopans/SWITCHERS201Aand567.php Retrieved October 7, 2014.This is a compilation of EMD Product Reference Data^{[unreliable source?]}
General Motors Electro-Motive Division Service Department "Locomotive Reference Data" published January 1, 1959, 286 pages.