EMD SD40T-2

EMD SD40T-2
SP 8238 eastbound at Caliente, California, in the late 1980s
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division
ModelSD40T-2
Build dateJune 1974 – July 1980
Total produced312
Specifications
Configuration:
​
 • AARC-C
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
TrucksHTC 6-Wheel
Wheel diameter40 in (1,000 mm)
Minimum curve30°
Wheelbase13 ft 7 in (4,140 mm) between axles in each truck
Pivot centres57 ft 3 in (17.45 m)
Length70 ft 8 in (21,540 mm)
Width10 ft 3 in (3,120 mm)
Height15 ft 7.5 in (4,762 mm)
Loco weight368,000 lb (167,000 kg)
or 184 short tons (164 long tons; 167 t)
Fuel capacity4,400 US gal (17,000 L; 3,700 imp gal)
Lubricant cap.395 US gal (1,500 L; 329 imp gal)
Coolant cap.275 US gal (1,040 L; 229 imp gal)
Sandbox cap.56 ft3 (1,600 L)
Prime moverEMD 16-645E3
Engine typeV16 diesel
AlternatorGMD14
GeneratorMain: AR10
Auxilary: Delco A8102
Traction motors6
Cylinders16
Cylinder size9.02 in (229 mm) x 10 in (250 mm)
MU workingYes
Train brakesWestinghouse 26L (Air Brake)
Performance figures
Maximum speed65 mph (105 km/h)
Power output3,000 hp (2,200 kW)
Tractive effort:
​
 • Starting92,000 lbf (42,000 kgf; 410 kN) @ 25%
 • Continuous82,100 lbf (37,200 kgf; 365 kN) @ 11 mph (18 km/h)
Career
OperatorsSouthern Pacific (and Cotton Belt), Rio Grande, Union Pacific
Nicknames"tunnel motors"
LocaleUnited States
Dispositionmost still in service as of 2010
[1]

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.[2] 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.

Original purchasers

Railroad Quantity Road numbers Notes
Denver and Rio Grande Western Railroad 73 5341-5413 All with 81 in. or 88 in. short noses.
St. Louis Southwestern Railway (Cotton Belt) 10 8322-8326, 8372-8376 "snoot noses"
Southern Pacific Railroad 229 8230-8299, 8300-8321, 8327-8341 8350-8371, 8377-8391, 8489-8573 8300 series featured extended "snoot" noses for radio control equipment. 8278 was damaged beyond repair in the 1989 Cajon Pass runaway and sold for parts, then scrapped.
Totals 312

Preservation

References

  1. ^ "The Diesel Shop EMD/GMD SD40T-2 Data Sheet".
  2. ^ Guss, Chris (January 1, 2018). "Tunnel (motors) from the past | Trains Magazine". TrainsMag.com. Archived from the original on 2019-02-09. Retrieved 2019-02-13.
  3. ^ "Ogden Union Station Equipment". utahrails.net. Retrieved 2024-03-09.
  4. ^ "Colorado Railroad Museum to cosmetically restore Rio Grande tunnel motor | Trains Magazine". Trains. 2018-08-30. Retrieved 2024-03-09.
  5. ^ "BSV Roster". jdhsmith.math.iastate.edu. Retrieved 2024-03-09.
  • Media related to EMD SD40T-2 locomotives at Wikimedia Commons
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