The ALCO S-1 and S-3 were 660 horsepower (490 kW) diesel-electric switcher locomotives produced by ALCO and their Canadian subsidiary Montreal Locomotive Works (MLW). The two locomotives differed only in trucks, with the S-1 using ALCO's own Blunt trucks, and the S-3 using AAR type A switcher trucks. The S-1 was built between April 1940 and ...

Dec 22, 2024 · The S3 was the third model of switcher in its "S" line that the company produced. It was virtually identical to the previous S1 model that was built from 1940 through 1950 and its interesting that American Locomotive even elected to …

Essentially an S1 with AAR type A trucks.

Mar 31, 2022 · With Alco’s Schenectady plant located near the NYC main line, the eastern giant was a dedicated Alco customer in both the steam and diesel eras. Across models S1, S2, S3, and S4, New York Central rostered 234 Alco diesel switchers.

Sources of information: Extra 2200 South, Diesel Era, The Short Line and The Canadian Trackside Guide. Additional info provided by R. Craig. Model: ?

The Alco S-3 were 660 horsepower (490 kW) switcher diesel-electric locomotives produced by ALCO and their Canadian subsidiary Montreal Locomotive Works (MLW). The models differed only in that the earlier S-1 had ALCo#Blunt bogie trucks, while the later S-3 …

SP received 10 ALCo S3's in 1951. These were the post war version of the 660hp S1, and were bought to dieselize light yards. As there were only ten, and light yards may be out of the way, references are very thin on the ground for this rare? model (S3).

Feb 8, 2023 · Operation and service manual for the ALCO S-1, S-3, and RS-1 locomotives.

City of Prineville Railway. Built 5/1952. GE Trade Ins? Ex PRR 8873, blt 11/50. Sold to ARC. PRR Class AS-6.

Dec 28, 2024 · This anonymous Alco S3 had been built in November 1950 (serial 78507) as Pennsylvania Railroad 8876, and was later Penn Central 9476. It was photographed on the Mississippi Export at Moss Point, Mississippi, possibly owned by George R. Sillcott, a dealer in used railroad equipment, although we don't know what it was doing here.