EMD SD9

The EMD SD9 is a model of diesel locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959. An EMD 567C 16-cylinder engine generated 1,750 horsepower (1.30 MW). Externally similar to its predecessor, the SD7, the SD9 was built with the improved and much more maintainable 567C engine.

EMD SD9
Burlington Northern SD9 #6234.
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division (EMD)
ModelSD9
Build dateJanuary 1954 – June 1959
Total produced515
Specifications
Configuration:
​
 • AARC-C
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter40 in (1,016 mm)
Wheelbase48 ft 7 in (14.8 m)
Length60 ft 8.5 in (18.5 m)
Fuel capacity1,200 or 2,400 US gal (4,500 or 9,100 L; 1,000 or 2,000 imp gal)
Lubricant cap.200 US gal (757 L)
Sandbox cap.50 cu ft (1.4 m3)
Prime moverEMD 567C
Engine typeV16 diesel
BoilerVapor-Clarkson Steam Boiler OK4625
Cylinders16
Performance figures
Power output1,750 hp (1.30 MW)
Career
DispositionMany have been rebuilt, and are still in service.

Four hundred and seventy-one SD9s were built for American railroads, while a further 44 were produced for export.

Many SD9s both high and short-hood can still be found in service today on shortline railroads and industrial operators. Although most Class 1 roads stopped using these locomotives by the 1970s and 1980s, some remain in rebuilt form on some major Class I railroads, as switcher locomotives.

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