description MLW M-420 Overview
The MLW M-420 is a Canadian B-B diesel-electric road-switcher locomotive manufactured by Montreal Locomotive Works from 1973 to 1977. It uses a twelve-cylinder ALCO 251C prime mover rated at 2,000 horsepower, GE electrical equipment, and four traction motors. The model was built for freight and mixed railway service in Canada and the United States, and its design is associated with the M-420 family of locomotives used by several railways.
help MLW M-420 FAQ
When and where was the MLW M-420 built?
Montreal Locomotive Works manufactured the M-420 in Canada from 1973 to 1977. It was a Canadian B-B diesel-electric road-switcher derived from the ALCO locomotive tradition.
How much power does the MLW M-420 produce?
The M-420 uses a 12-cylinder ALCO 251C prime mover rated at 2,000 horsepower. GE electrical equipment and four traction motors convert that engine power into tractive effort.
What does B-B mean on the MLW M-420?
B-B describes a locomotive with two two-axle trucks, giving it four powered axles. That arrangement suits a road-switcher intended for both freight movement and yard or local duties.
Is the MLW M-420 related to the ALCO C420?
Yes, the M-420 continued the basic ALCO Century road-switcher lineage after Montreal Locomotive Works. Its 12-cylinder 251C engine and 2,000-horsepower rating place it close to the C420 concept.
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