The ALCO S2 and S4 were 1000 horsepower (746 kW) switcher diesel-electric locomotives produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). Basically the two locomotives differed only in trucks with the S-2 using ALCO’s own Blunt trucks and the S-4 riding on standard AAR type A switcher trucks. Both were powered by ALCO 539 turbocharged 6-cylinder diesels.
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height (cm)
4.2672
length (km)
14.0208
width (mm)
3.048
builder
Montreal Locomotive Works, American Locomotive Company
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