EMD SD45X

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EMD SD45X
Type and origin
Power type Diesel-electric
Builder General Motors Electro-Motive Division (EMD)
Model SD45X
Build date June 1970 to February 1971
Total produced 7
Specifications
AAR wheel arr. C-C
UIC classification Co'Co'
Gauge 4 ft 8 12 in (1,435 mm)
Prime mover EMD 20-645E3A
Cylinders V20
Performance figures
Power output 4,200 hp (3,130 kW)
Career
Locale United States

An EMD SD45X is a 6-axle experimental diesel-electric locomotive built by General Motors Electro-Motive Division between June 1970 and February 1971. Power was provided by an EMD 645E3A 20-cylinder engine which generated 4,200 horsepower (3,130 kW). 7 examples of this locomotive model were built for American railroads. 6 of these units would end up in service with Southern Pacific Railroad. One was rebuilt in 1980 by Morrison-Knudsen into an SD45Xm with a long hood from a scrapped DD35.

Original owners
Qty. Railroad Road Numbers Date Builders #s Notes
1 EMD 4201 6/70 36806 EMD demo, to SP 9503, 12/72
2 EMD 4202, 4203 2/71 36807, 36808 EMD demo, to SP 9504-9505, 12/72
1 EMD 5740 6/70 34123
1 Southern Pacific 9500 8/70 35741
2 Southern Pacific 9501, 9502 9/70 35742, 35743

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