ALCO S-1 and S-3
|ALCO S-1 and S-3|
MidContinent Railway #7, an S-1, rests between trains on October 10, 2004.
|Type and origin|
|Builder||American Locomotive Company, and
Montreal Locomotive Works
|Model||S-1 and S-3|
|Build date||S-1: April 1940 – June 1950
S-3: February 1950 – November 1953
|Total produced||S-1: 550
|AAR wheel arr.||B-B|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
S-3: AAR type A
|Wheel diameter||40 in (1,000 mm)|
|Wheelbase||30 ft (9.14 m)|
|Length||45 ft (14 m)|
|Width||10 ft 2 1⁄2 in (3.112 m)|
|Height||14 ft 4 3⁄8 in (4.378 m)|
|Locomotive weight||199,000 lb (90,000 kg)|
|Fuel capacity||635 US gal (2,400 L)|
|Prime mover||Alco 539|
|Engine type||Four-stroke diesel|
|Displacement||9,572 cu in (156.86 l)|
|Generator||GE GT 552-A|
|Traction motors||(4) GE 731|
|Cylinder size||12 1⁄2 in × 13 in (318 mm × 330 mm)|
|Power output||660 hp (490 kW)|
|Tractive effort||49,790 lb (22,580 kg)|
|Locale||North America, Brazil, United Kingdom|
The ALCO S-1 and S-3 were 660 horsepower (490 kW) switcher diesel-electric locomotives produced by ALCO and their Canadian subsidiary Montreal Locomotive Works (MLW). Basically, the two locomotives differed only in trucks, with the S-1 using ALCO's own Blunt trucks, and the S-3 riding on standard AAR type A switcher trucks. The S-1 was built between April 1940 and June 1950, with a total of 540 completed, while the S-3 was constructed between February 1950 and November 1953 (MLW until 1957) with total sales of 292. A modified version, the S-10, was built by MLW only; 13 were built between January and June 1958.
The S-1 and S-3 are distinguishable externally from the very similar S-2 and S-4 1,000 horsepower (750 kW) switchers in that they have a smaller exhaust stack with a round base and a smaller radiator shutter area on the nose sides. The S-1/S-3 radiator shutter area is taller than it is wide, while the S-2/S-4 radiator area is wider. The smaller stack is due to the lack of turbocharging.
The S-10 is not externally distinguishable from later Canadian-built S-3 locomotives; it differed mostly in electrical equipment.
The S-1 and S-3 models were sold to an extensive list of railroads and industrial operators, as detailed below. Major owners of the S-1 included the New York Central Railroad (NYC), with 71 locomotives; the New Haven with 65 locomotives; the L&N with 45 locomotives; the C&NW, with 29 locomotives; and the Pennsylvania Railroad (PRR) with 27 locomotives. Major customers for the S-3 included the CP, with 101; the CN, with 49; the NYC, with 43 locomotives; the B&M, with 16; and the PRR, with 13. The MLW S-10 was sold only to the CP.
The totals below include export orders and MLW-built locomotives.
Locomotives built by ALCO
Locomotives built by Montreal Locomotive Works
|Montreal Locomotive Works (demonstrator)||
||CP7004||to Price Brothers 106|
|Bathhurst Power and Paper||
|Canadian National Railway||
||8450–8498||to Southern Ontario Locomotive Restoration Society 6593|
|Canadian Pacific Railway||
|Essex Terminal Railway||
|National Harbours Board||
|Canadian Pacific Railway||
Quite a few S1s still survive in operation with shortline railroads in the United States. Several more are preserved at US railroad museums.
The Stockton Terminal and Eastern Railroad in Stockton, California still uses an S1, although the locomotive, former Western Pacific 505, is now considered a back-up to the railroad's primary locomotives.
Three S1s are preserved at the Western Pacific Railroad Museum at Portola, California: Western Pacific locos 504 and 506 and a former U. S. Army locomotive painted to represent a Western Pacific locomotive.
The former Procter & Gamble #9, repainted as NYC 9339, is, as of 2008, in regular use on the Whitewater Valley RR in Connersville, IN.
A Canadian S-3 has been restored to original condition and is on display at the Saskatchewan Railway Museum.
The former LIRR/SIRT 407 is currently in operation on the Catskill Mountain Railroad as CMRR #407.
National Research Council CSTS 6593, the former CP 6593, is being repaired at the Waterloo Central Railway St. Jacobs Repair Shop. She is owned by the Southern Ontario Locomotive Restoration Society and operated as WCR #6593.
USAX 7177 is preserved at the Utah State Railroad Museum in Ogden, Utah. This locomotive was assigned to Hill Air Force Base before retirement.
Lake Whatcom Railway, in North Western Washington (Wickersham, WA), uses exx-Northern Pacific Terminal S-1 #30 to power their short excursion trains.
The former Manistique & Lake Superior Alco S3 is at the National Railway Museum in Green Bay Wisconsin, painted as a Green Bay & Western unit.
Many S1 and S3 locomotives are at the hobo railroad. This railroad is located Lincoln New Hampshire. Also further down the line the Winnipesaukee Scenic Railroad in Meredith New Hampshire.
801 was bought for preservation from European Metal Recycling, Kingsbury, Warwickshire by Northumbria Rail Ltd. and was moved to Longhoughton Goods Yard where restoration is taking place with assistance from members of The UK ALCo Group. It was the first UK ALCo to be restarted and moved under its own power and has been moved to the Nene Valley Railway.
802 was scrapped.
804 is currently under overhaul at Railworld in Peterborough UK, again with assistance from members of The UK ALCo Group. 804 was started up for the first time since 1985 on the 4th July 2009. The locomotive is currently for sale and will be scrapped if no one comes forward by the middle of October 2013.
805 was scrapped in early 1990s.
|Wikimedia Commons has media related to ALCO S-1 locomotives.|
|Wikimedia Commons has media related to ALCO S-3 locomotives.|
- Dorin, Patrick C. (1972). Chicago and NorthWestern Power. Superior Publishing. pp. 134–135. ISBN 0-87564-715-4.
- Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Kalmbach Publishing Co., Milwaukee, WI. pp. 221–222. ISBN 0-89024-026-4.
- Toppan, Andrew et al. Alco/MLW S-1 Roster. Retrieved on January 12, 2004.
- Toppan, Andrew et al. Alco/MLW S-3 Roster. Retrieved on January 13, 2004.