ALCO S-2

The ALCO S2 were 1,000 horsepower (746 kW) diesel electric switchers produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). The locomotives differed only in trucks, with the S-2 using ALCO "Blunt" trucks, and the S-4 using AAR type A switcher trucks.
The S-2 was built between August 1940 and June 1950, with a total of 1502 completed, while the S-4 was constructed between June 1949 and August 1957 (MLW until 1957) with total sales of 797.
== Gallery ==
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Category:Diesel locomotives
Category:Four-axled diesel locomotives
Category:ALCO locomotives
Category:Diesel switchers
Category:Built in 1940
Category:Switcher locomotives
Category:Locomotives
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