| ALCO S-6 |
|---|
 |
| SP #1231 at El Centro, California, in 1970. |
| Power type |
Diesel-electric |
|---|
| Builder |
ALCO |
|---|
| Model |
S-6 |
|---|
| Build date |
May 1955 – December 1960 |
|---|
| Total produced |
126 |
|---|
| AAR wheel arr. |
B-B |
|---|
| UIC classification |
Bo′Bo′ |
|---|
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
|---|
| Length |
45 ft 5 in (13.84 m)[1] |
|---|
| Width |
10 ft (3.05 m) |
|---|
| Height |
14 ft 8 in (4.47 m) |
|---|
| Locomotive weight |
230,000 lb (104.3 tonnes) |
|---|
| Fuel capacity |
635 US gal (2,400 l; 529 imp gal) |
|---|
| Lubricant capacity |
140 US gal (530 l; 120 imp gal) |
|---|
| Coolant capacity |
110 US gal (420 l; 92 imp gal) |
|---|
| Sandbox capacity |
26 cu ft (0.74 m3) |
|---|
| Prime mover |
ALCO 251A,B |
|---|
| Engine RPM range |
375 – 1000 rpm |
|---|
| Engine type |
Four-stroke diesel |
|---|
| Displacement |
668 cu in (10.95 l) per cylinder
4,008 cu in (65.68 l) total |
|---|
| Generator |
GE GT533 |
|---|
| Traction motors |
GE 752 (4 off) |
|---|
| Cylinders |
Straight 6 |
|---|
| Cylinder size |
9 in × 10+1⁄2 in (229 mm × 267 mm) |
|---|
| Top speed |
60 mph (97 km/h) |
|---|
| Power output |
900 hp (670 kW) |
|---|
| Locale |
United States, Mexico |
|---|
| Preserved |
Two [2] |
|---|
The Alco S-6 (spec. 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 a development of the earlier S-5; instead of the 800 hp (600 kW) ALCO 251 engine on the previous locomotive, the S-6 used a 251A or 251B engine rated at 900 horsepower (670 kW). The locomotive rode on two-axle AAR trucks, giving a B-B wheel arrangement. A cow-calf version was produced exclusively for Oliver Iron Mining Company, who bought two: this was the SB-8/SSB-9 (DL-441). The freight train used to smash the DeLorean DMC-12 time machine in Back to the Future Part III was pulled by two Alco S-6 locomotives in Ventura County Railroad livery.
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