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ALCO S-6 Type and origin Power type Diesel-electric 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)[ 1] 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 251 A,BRPM range375 – 1000 rpm Engine type Four-stroke diesel Displacement 668 cu in (10.95 L) per cylinder Generator GE GT533 Traction motors GE 752 (4 off) Cylinders Straight 6 Cylinder size 10+ 1 ⁄2 in (229 mm × 267 mm)
Performance figures Power output 900 hp (670 kW )
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 ALCO 251 engine on the previous locomotive, the S-6 used a 251A or 251B engine rated at 900 horsepower . 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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