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The EMD SD40 is an American 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972. 1,268 locomotives were built between 1966 and 1972. In 1972, an improved version with new electronics was developed and marketed as a new locomotive, the SD40-2 .
The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C diesel–electric locomotive built by EMD from 1972 to 1989. The SD40-2 was introduced in January 1972 as part of EMD's Dash 2 series, competing against the GE U30C .
This is a summary, listing every diesel locomotive from the SD40-series in preservation. This list includes the models SD40 , SDP40 , SD40A , SD40-2 , SDP40F , SD40T-2 , SD40-2W , SD40-2S . SD40
The SD40A was designed as an EMD SD40 built on a frame of an EMD SDP45. The longer SDP45 frame allowed for a larger, 5000 gallon fuel tank. [1] This locomotive is powered by a 16-cylinder EMD 645E3 diesel engine, which could provide 3,000 horsepower (2,240 kW).
The SD40T-2 is a model of diesel-electric locomotive built by General Motors Electro-Motive Division in the United States. The SD40T-2 is equipped with a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower (2,240 kW). 312 SD40T-2s were built for three railroads in the United States between April 1974 and July 1980.
The EMD SD40X is a 6-axle experimental diesel-electric locomotive built by General Motors Electro-Motive Division between 1964 and 1965. Nine examples of this locomotive were built for test purposes to test the new 645-series prime mover 16-645E3.
The main difference was the power: the SD38 produced 2,000 hp (1,490 kW) from a non-turbocharged V16, the SD40 produced 3,000 hp (2,240 kW) from a turbocharged V16, and the SD45 produced 3,600 hp (2,680 kW) from a turbocharged V20. The SD40 and SDP40 were so similar that EMD published common operator's and service manuals to cover both.
They are a variant of the WAGR L class (itself an Australianised EMD SD40) fitted with safety cabs. Initially, the first four were placed on the North East line to haul services from Melbourne to Albury while the latter six were put on the broad gauge to haul services on the Serviceton line .