ALCO S-6

ALCO S-6

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+1⁄2 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 GT-533 (or GE GT-584)
Traction motors	4 × GE 731 (GE 752 optional^[1])
Cylinders	Straight 6
Cylinder size	9 in × 10+1⁄2 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

^[2]

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.

Design

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, two sets were produced of this version.^[3]

Original owners

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 Railway	2	151, 152
Ferrocarriles Unidos de Yucatán	1	301

In popular culture

In Back to the Future Part III, two double headed S-6 locomotives destroyed the DeLorean time machine, when it returned to 1985.

References

^ Strapac, Joseph A. (March 2013). Southern Pacific Historic Diesels Volume 18: Alco and GE Diesel Switchers. Bellflower, CA: Shade Tree Books. p. 73. ISBN 978-0-930742-44-7.
^ "ALCO S-6 Data Sheet". The Diesel Shop. Retrieved 2006-11-29.
^ Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. p. 230. ISBN 978-0-89024-026-7.

External links

Wikimedia Commons has media related to ALCO S-6 locomotives.

Sarberenyi, Robert. Alco S5, S6, and SSB9 Original Owners.

v t e Diesel-electric locomotives built by ALCO
Switchers	ALCO 300 ALCO 600 HH600 HH660 HH900 HH1000 S-1 S-2 S-3 S-4 DL420 S-5 S-6 T-6 SB-8/SSB-9
RS, RSC and RSD series	RS-1 RS-2 RS-3 (RS-3M) RS-11 RS-27 RS-32 RS-36 RSC-1 RSC-2 RSC-3 RSD-1 MRS-1 RSD-4 RSD-5 RSD-7 RSD-12 RSD-15
Cab units	Rebel power car DL-103b DL-105 DL-107 DL-108 DL-109 DL-110 DL-202 DL-203 FA FB PA PB
Century series	C415 C420 C424 C425 C430 C628 C630 C636 C855
Diesel-hydraulics	DH643
Export locomotives	DL560C RSD-39
Unproduced locomotives	C428 C620 C624 C636F C636P C650DH
List of ALCO diesel Locomotives

v t e Diesel and gas turbine locomotives built by MLW
Early switchers	S-2 S-3 S-4 S-7 S-10 S-11 S-12 S-13
Cab units	FA-1 FB-1 FA-2 FB-2 FPA-2 FPB-2 FPA-4 FPB-4
Roadswitchers	RS-1 RS-2 RS-3 RSC-3 RS-10 RS-11 RSD-12 RS-13 RSC-13 RSC-14 RSD-17 RS-18 RS-23 RSC-24 RSD-35
Century series	C-415 C-424 C-630M
M series	M-420 M-420B M-420R M-420TR M-420TR-2 M-424 M-630 M-636 M-640
Other designs	DL500S DL535E M420 TURBO LRC-2 LRC-3 E-1800
Bombardier designs	HR-412 HR-616
(See also: List of MLW diesel locomotives)

v t e Diesel–electric switcher locomotives
Alco	ALCO Boxcab ALCO 600 HH600 HH660 HH900 HH1000 S-1 S-2 S-3 S-4 S-5 S-6 T-6 SB-8/SSB-9
Baldwin	VO-660 DS-4-4-660 DS-4-4-750 S-8 RS-4-TC VO-1000 DS-4-4-1000 S-12
Fairbanks-Morse	H-10-44 H-12-44 H-12-44TS H-12-46
GE	60-ton boxcab 100-ton boxcab 600-hp centercab 1000-hp centercab DEY-2 EN-6 25-ton 35-ton 43-ton 44-ton 45-ton 50-ton 60-ton 65-ton 70-ton 80-ton 95-ton 100-ton 110-ton 125-ton 126-ton 128-ton 1800-hp transfer 2000-hp transfer U5B U6B
GM/EMD	SC, SW, NC, NC1, NC2, NW, NW1, NW1A, NW4, T NW2 NW3 NW5 TR1 SW1 SW7 SW8 SW9 SW14 SW600 SW900 SW1000 SW1001 SW1200 SW1500 SW1504 MP15DC MP15AC MP15T RS1325 GMD1
Lima-Hamilton	LS-750 LS-800 LS-1000 LS-1200
National Railway Equipment	1GS7B 2GS14B 3GS21B 3GS21C

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This page was last edited on 16 December 2023, at 14:21

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