EMD SW7

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, 30 TR4 cow–calf paired sets were produced.^[3]

EMD SW7
Baltimore and Ohio No. 9624 TR4 cow–calf set at Riverside Yard, Baltimore, in 1969
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: 30
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[1] Engine type V12 diesel Aspiration Roots-type blower Cylinders 12
Performance figures Power output 1,200 hp (895 kW)

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

External links

• Media related to EMD SW7 locomotives at Wikimedia Commons

See also

• List of GM-EMD locomotives