EMD GP20

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Data Sheet Information Compiled by: JEAN-DENIS BACHAND
New: 9 June 2006 Artwork by: Jean-Denis Bachand
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Engine Builder: EMD Engine: 567D2 16 cylinder
Bore & Stroke 8.5" X 10"
RPM (Maximum / Minimum) 800 / 275
Main Generator: GM - D22 Horsepower: 2000
Gear Ratio: 62:15 Speed: 65 mph
Trucks: 4-Wheel Configuration: B-B
Traction Motor Blowers: Delco Electric Drive (4) Model: GM
Weight: 240,000 lbs Traction Motors: GM - D47 (Four)
Tractive Effort (starting) 64,000 lbs @25% Tractive Effort (continuous): 45,000 lbs @ 9.3 mph
Multiple Unit Capability: Yes Dynamic Braking: Yes
Auxilary Generator: Delco 64-72 Alternator: GM D14
Air Brake: Westinghouse Model: 24RL
Compressor: Gardner-Denver Model: WBO
Quantity Built: 269 (and 9 GP9 UP rebuilds to GP20 specs) Dates: 11/1959 to 4/1962
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Exterior Dimensions GP20
Total Length 56'-02"
Wheel Diameter 40"
Truck Wheel Base 9'-00"
Height to Top Engine Hood 13'-11"
Height to Top Cab 14'-06"
Cab Width 10'-03"
Engine Hood Width 10'-00"
Top of Walkway 8'-09"
Walkway Width 4'-07.5"
Center Bolster 31'-00"
Center Front Truck to Front Pilot 3'-10"
Center Rear Tucrk to Rear Pilot 3'-10"
Distance between Truck Centers 40'-00"
Minimum Turning Radious 39 degrees
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Fuel Oil: 900 Lubricating Oil: 227
Engine Cooling Water: 220 Sand Capacity: 18 cu. ft.
Options: Vapor Clarkson Boiler #4625
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Reference Sources:
  • Diesel Locomtoives, Vol.2, by Bob Hayden
  • Illustrated Treasury of GM Locomotives, by James W. Kerr
  • Diesel Locomotives, The First 50 Years by Louis A. Marre
  • The Second Diesel Spotter's Guide, by Jerry A. Pinkepank
  • "Early Diesel and Electric Locomotives," Rail Heritage Publications
  • Diesel & Electric Locomotive Specificiations, 1981 by F.K. Hudson
  • Train Shed Cyclopedia, Vol. 20, 58, 60, 64, 80

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