ALCO S-6

Specifications
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)
Cylinders	Straight 6
Cylinder size	9 in × 10+1⁄2 in (229 mm × 267 mm)

Type and origin
Type and origin
Power type	Diesel
Builder	ALCO
Model	S-6
Build date	May 1955–December 1960
Total produced	126

ALCO S-6
ALCO S-6
	SP No. 1231 at El Centro, California, in 1970
Power type
Type and origin
Power type	Diesel
Builder	ALCO
Model	S-6
Build date	May 1955–December 1960
Total produced	126
Configuration:;
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)
Cylinders	Straight 6
Cylinder size	9 in × 10+1⁄2 in (229 mm × 267 mm)
Maximum speed
Performance figures
Maximum speed	60 mph (97 km/h)
Power output	900 hp (670 kW)
Locale
Career
Locale	United States, Mexico

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.

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