ALCO S-6

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ALCO S-6
Hugh llewelyn 1231 (5963970156).jpg
SP No. 1231 at El Centro, California, in 1970
Type and origin
Power type Diesel
Builder ALCO
Model S-6
Build date May 1955–December 1960
Total produced 126
Specifications
Configuration:
 • AAR B-B
 • UIC Bo′Bo′
Gauge 4 ft 8 12 in (1,435 mm)
Length 45 ft 5 in (13.84 m)
Width 10 ft (3.05 m)
Height 14 ft 8 in (4.47 m)
Loco weight 230,000 lb (104.3 tonnes)
Fuel capacity 635 US gal (2,400 l; 529 imp gal)
Lubricant cap. 140 US gal (530 l; 120 imp gal)
Coolant cap. 110 US gal (420 l; 92 imp gal)
Sandbox cap. 26 cu ft (0.74 m3)
Prime mover ALCO 251A or B
RPM range 375–1000 rpm
Engine type Four-stroke diesel
Generator GE GT533
Traction motors 4 × GE 731
Cylinders Straight 6
Cylinder size 9 in × 10 12 in (229 mm × 267 mm)
Performance figures
Maximum speed 60 mph (97 km/h)
Power output 900 hp (670 kW)
Career
Locale United States, Mexico
[1]

The Alco S-6 (specification DL 430) was a diesel-electric locomotive of the switcher type 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.

Design[edit]

Visually indistinguishable from the S-5, the S-6 used an ALCO 251A or 251B prime mover rated at 900 horsepower (670 kW). The locomotive rode on two-axle AAR trucks, giving a B-B wheel arrangement. ALCO produced a cow-calf variant for the Oliver Iron Mining Company designated SB-8/SSB-9.[2]

Original owners[edit]

Railroad Quantity Road Number Notes
Allied Chemical Company 1 110
ARMCO Steel 1 1202
B. Perini & Sons Construction Company 1 101 to Upper Merion and Plymouth Railroad 101
Belt Railway of Chicago 1 420
Ferrocarril Chihuahua al Pacífico 1 60 Renumbered 106
Cia Fundidora de Hierro y Acero 3 1–3
Ferrocarril del Pacífico 24 701–723
Ferrocarriles Nacionales de México 1 5300
Northern Pacific Railway 1 750 to Burlington Northern Railroad 950
Ohio River Company (ORCo) 1 56
Republic Steel 3 153,317,318
Secretaria de Comunicaciones de Obras Publicas (SCOP) 3 7133-1,2,3 to Ferrocarril del Sureste (same numbers)
Sheffield Steel 2 15,16
Southern Pacific Railroad 70 1033–1082,4634–4645 renumbered 1200–1257, 1270–1281
South Buffalo Railway 6 40–45
Tennessee Copper 1 107
Upper Merion and Plymouth Railroad 1 61
U.S. Pipe and Foundry 1 38
Columbia Geneva Steel 1 1
Western Maryland Railroad 2 151,152
Ferrocarriles Unidos de Yucatán 1 301

See also[edit]

References[edit]

  1. ^ "ALCO S-6 Data Sheet". The Diesel Shop. Retrieved 2006-11-29. 
  2. ^ Pinkepank, Jerry A. (1973). The Second Diesel Spotter’s Guide. Milwaukee, WI: Kalmbach Publishing Company. p. 230. ISBN 0-89024-026-4. 

External links[edit]