The Alco S-6 (specification DL 430) was a diesel–electric switcher locomotive constructed by ALCO of Schenectady, New York; a total of 126 locomotives were built between May 1955 and December 1960. The S-6 was an improved version of the earlier S-5.

Dec 22, 2024 · The Alco S6 (designed by the company as its DL430) was quite similar to all of its previous siblings, and as aforementioned was the successor to Alco's S5 design. The S5 was the first switcher to employ Alco's very own prime mover, the model 251A, which was capable of producing 800 horsepower via 6 cylinders.

The American Locomotive Company (ALCO), based in Schenectady, New York, United States produced a wide range of diesel-electric locomotives from its opening in 1901 until it ceased manufacture in 1969.

The Alco S-6 (specification DL 430) was a diesel-electric switcher locomotive constructed by ALCO of Schenectady, New York; a total of 126 locomotives were built between May 1955 and December 1960. The S-6 was an improved version of the earlier S-5.

Alco S-5, S-6 & SSB-9 Production Rosters; Revised: 10 April 2019: Info from: John Komanesky: Original owner Road Numbers Qty. Bldr Numbers Bldr Dates; Alco S-5

Occasionally four GE287 traction motors, from trade-in units, would be installed rather than GE731s.

Alco Reference #1 by Bob Liljestrand Brotherhood of Locomotive Firemen and Enginemen Magazine, October 1953

Between 1955 and 1956 Espee receieved 70 Alco S-6 switchers. Two distinct varieties were delivered, #1033-1090 (later #1200-1257) were used as switcher, transfer and branchline units if photo captions are anything to go by.

All S6's on this site : 4/1/2025 View Photos ·Home · ... ·Contributor Sites; Members ·Log In ·Register : Home > Locomotive Models > Alco S6 : All S6's on this site : Click on a locomotive to view pictures: Roster Options: Show All thumbs;

Alco S5, S6, SSB9 - Original Owners. by Robert Sarberenyi. S5: 8 US; S6: 93 US, 33 Mexico; SSB9: 2 US