EMD E7A and E7B

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Data Sheet Information Compiled by: JEAN-DENIS BACHAND
New: 4 August 2006  Artwork by: Jean-Denis Bachand
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Engine Builder: Winton Engines: Two 567A 12 cylinder
Bore & Stroke 8.5" X 10"
RPM (Maximum / Minimum) 800 / 275
Main Generator: GM - D4 (Two) Horsepower: 2000
Gear Ratio: 57:20 Speed: 85 mph
Trucks: 6-Wheel Configuration: A1A-A1A
Traction Motor Blowers: Mechanical Drive (2) Model: GM
Weight: 315,000 lbs (290,000 lbs for B-unit) Traction Motors: Four GM - D7
Tractive Effort (starting) 56,500 lbs @25% Tractive Effort (continuous): 31,000 lbs @ 11 mph
Multiple Unit Capability: Yes Dynamic Braking: Yes (and No for B-unit)
Boiler: Vapor-Clarkson Capacity: 1200 lbs./hr.
Auxilary Generator: Delco -
Air Brake: Westinghouse Model: 24RL
Compressor: Gardner-Denver Model: WXO
Quantity Built: 428 A-units and 82 B-units Dates: 2/45 to 4/49
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Exterior Dimensions E7 (and E7B)
Total Length 70'-00"
Wheel Diameter 36"
Truck Wheel Base 14'-01"
Height to Top Engine Hood 13'-11"
Height to Top Cab 14'-11"
Cab Width 10'-06.5"
Engine Hood Width 9'-03"
Center Bolster 43'-00"
Center Front Truck to Front Pilot 6'-01.5" (and 5'-01.5 for b-units)
Center Rear Truck to Rear Pilot 5'-01.5"
Distance between Truck Centers 57'-01"
Minimum Turning Radious 57 degrees
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Fuel Oil: 1200 Lubricating Oil: 330
Engine Cooling Water: 400 Sand Capacity: 16 cu. ft.
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Somebody's Large Digital Image Here
Artwork by: JEAN-DENIS BACHAND
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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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