Built by the American Locomotive Company (Alco) the low-hood S-2 was introduced in 1940 to replace Alco’s earlier high-hood switchers. The 1000 horsepower S-2 was a turbocharged version of the S-1. There were 1,502 S-2s sold to North American Railroads. The versatility of the S-2s was evidenced by their service on mainline, shortline and industrial railroads.
