EMD SD40T-2

Specifications
Specifications
Configuration:;
• AAR	C-C
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length	70 ft 8 in (21.54 m)
Width	10 ft 3 in (3.12 m)
Height	15 ft 7.5 in (4.763 metres)
Loco weight	368,000 lb (167,000 kg)
Fuel capacity	4,400 US gal (16,700 L; 3,660 imp gal)
Prime mover	EMD 16-645E3
Engine type	V16 diesel
Cylinders	16

Type and origin
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division
Model	SD40T-2
Build date	June 1974 – July 1980
Total produced	312

EMD SD40T-2
EMD SD40T-2
	SP 8238 eastbound at Caliente, California, in the late 1980s
Power type
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division
Model	SD40T-2
Build date	June 1974 – July 1980
Total produced	312
Configuration:;
Specifications
Configuration:;
• AAR	C-C
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length	70 ft 8 in (21.54 m)
Width	10 ft 3 in (3.12 m)
Height	15 ft 7.5 in (4.763 metres)
Loco weight	368,000 lb (167,000 kg)
Fuel capacity	4,400 US gal (16,700 L; 3,660 imp gal)
Prime mover	EMD 16-645E3
Engine type	V16 diesel
Cylinders	16
Power output
Performance figures
Power output	3,000 hp (2,240 kW)
Tractive effort	92,000 lbf (410 kN) (starting); 82,000 lbf (360 kN) (continuous)
Operators
Career
Operators	Southern Pacific (and Cotton Belt), Rio Grande, Union Pacific
Nicknames	"tunnel motors"
Locale	United States
Disposition	most still in service as of 2010

The SD40T-2 is a model of diesel-electric locomotive built by General Motors Electro-Motive Division in the United States. The SD40T-2 is equipped with a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower (2,240 kW). 312 SD40T-2s were built for three railroads in the United States between April 1974 and July 1980. This locomotive and the SD45T-2 are popularly called tunnel motors, but EMD's term is SD40-2 with "cooling system modifications" because they were designed for better engine cooling in mountainous areas. The difference between this locomotive and its non-tunnel motor cousin, the SD40-2, are the radiator air intakes are located lower down at the rear of the locomotive.

This locomotive model was purchased by the Denver and Rio Grande Western Railroad, the Southern Pacific Railroad, and its subsidiary Cotton Belt. Southern Pacific's version has a 4,400-US-gallon (16,700 L; 3,660 imp gal) fuel tank and is 70 feet 8 inches (21.54 m) long. Rio Grande's version has a smaller 4,000-US-gallon (15,100 L; 3,330 imp gal) fuel tank.

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