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The EMD SD7 is a model of 6-axle diesel locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953. It had an EMD 567B 16-cylinder engine producing 1,500 horsepower (1.12 MW) for its six traction motors.
Type Road number Build year Total produced AAR wheel arrangement Prime mover Power output Image EMC 1800 hp B-B: ATSF 1: 1935 1 B-B+B-B: Dual Winton 12-201-A: 1,800 hp (1,342 kW)
Most of these locomotives were purchased or leased from the SP&S's parent roads Great Northern Railway and Northern Pacific Railway. The 4-8-4 Northerns and 4-6-6-4 Challengers were purchased new. This roster groups steam locomotives by their wheel arrangement and the railroad's designated class.
Due to the Alaska Railroad's satisfaction with these locomotives, they specially ordered additional models after EMD had transitioned production to the SD70ACe.The last order of Alaska Railroad SD70MACs was built/delivered in late 2007. [6] [7] The trucks were replaced with HTCR-4, instead of HTCR-I on former model.
These locomotives were built as a response to General Electric's Dash 9-44CW, where as their cousins, the SD70MAC, were built in response to General Electric's AC4400CW. By increasing the output of the 16-710-G3 engine from 4,000 to 4,300 horsepower (3,000 to 3,200 kW), the SD75 was a reality.
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 EMD SD60 is a 3,800 horsepower (2,800 kW), six-axle diesel-electric locomotive built by General Motors Electro-Motive Division, intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995.
From January 1973 through January 1978 the Atchison, Topeka and Santa Fe Railway rebuilt its fleet of eighty SD24 locomotives, naming the resulting type the SD26. The rebuild boosted the power output of the locomotives by upgrading the 16-567D3 engines with EMD 645 power assemblies. Other work improved the reliability by replacing the entire ...