description EMD SD40 Overview
The EMD SD40 is a six-axle diesel-electric freight locomotive produced by General Motors Electro-Motive Division from 1966 to 1972. It uses a 3,000-horsepower EMD 645-series diesel engine and a C-C wheel arrangement, giving it the tractive capacity required for heavy North American freight service. The SD40 formed part of EMD's 40 Series and provided the mechanical basis for the later SD40-2, one of the most widely recognized locomotives in the series.
help EMD SD40 FAQ
How much horsepower does the EMD SD40 have?
The EMD SD40 is rated at 3,000 horsepower. It is a six-axle diesel-electric locomotive built by General Motors Electro-Motive Division.
When was the EMD SD40 built?
Production ran from 1966 to 1972. The model became a familiar American freight locomotive because of its reliability and high production volume.
Why was the SD40-2 introduced after the SD40?
The SD40-2 kept the 3,000-horsepower rating while adding updated electrical and frame equipment. EMD began building the SD40-2 in 1972 as part of its Dash 2 range.
Was the EMD SD40 mainly a freight locomotive?
Yes, the SD40 was designed primarily for heavy freight service. Its six-axle layout gave it strong traction on grades and difficult routes.
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