General Electric U23B

Quantity Built: 481

8/1968 to 6/1977

Somebody's Large Digital Image Here
Revised: 9 July 2012 Photograph by: R. Craig
- Info Supplied by: John Komanesky
Original owner Road Numbers Qty. Bldr Numbers Batch /Order Numbers Bldr Dates
Atchison Topeka & Santa Fe 6300 - 6323 24 37491-37514 2514/2516 6-10/70
6324 - 6348 25 37515-37539 2514/2516 10/70-2/71
Chesapeake & Ohio 2300 - 2329 30 37228-37257 2508 9-10/69
Conrail 2789 - 2798 10 41584-41593 1412 5-6/77
Delaware & Hudson 301 - 316 16 36803-36818 2601 8-9/68
Lehigh Valley 501 - 512 12 40098-40109 1437 11/74
Louisville & Nashville 2708 - 2727 20 38765-38784 1410 1-4/73
2728 - 2752 25 39257-39281 2579 6-9/73
2753 - 2772 20 39508-39527 1423 2-4/74
2800 - 2824 25 40110-40134 1444 12/74-3/75
Milwaukee 4800 - 4804 5 38872-38876 2575 8/73
Missouri-Kansas-Texas 350 - 352 3 39225-39227 2577 5/73
Missouri Pacific 668 - 674 7 38758-38764 2561 1-2/73
2257 - 2267 11 39905-39915 1447 11/74
2268 - 2273 8 40356-40361 1464 3/75
2274 - 2278 5 40920-40924 1407 6/76
2279 - 2288 10 41523-41532 1414 12/76-1/77
Monon 601 - 608 8 37293-37300 2512 3-5/70
Penn Central 2700 - 2749 50 38506-38555 2540 8-10/72
2750 - 2776* 27 39305-39331 2582 8-10/73
Southern Ry 3900 - 3904 5 38392-38396 2523 5/72
3905 - 3914 10 39215-39224 2576 5-6/73
3915 - 3934 20 39621-39640 1422 5/74
3935 - 3954 20 40078-40097 1443 5-7/75
3955 - 3969 15 41508-41522 1409 11/76-2/77
Texas Utilities 103 1 40719 1461 5/75
Western Pacific 2251 - 2265 15 38397-38411 2525 5-6/72
MEXICO
Ferrocaril del Pacifico 537 - 546 10 40820-40829 1404 8-9/75
National de Mexico 9100 - 9113 14 40326-40339 1484/2812 3/75
9114 - 9121 8 40340-40347 1484/2812 3-5/75
9122 - 9129 8 40348-40355 1484/2812 5-6/75
PERU
Southern Peru Copper 40 - 45 6 40372-40377 1463 10-11/75
50 - 57 8 40362-40369 1462 3-5/75
58, 59 2 40370, 40371 1463 10, 11/75
* 16 of these PC units were equipped with control stands set-up for long hood forward operation,

Source of information: Extra 2200 South

Batch / Purchase Order numbers were compiled Dave Dallner.

GE U23B

Technical Data

Drawings and Technical Data Supplied by: Jean-Denis Bachand
POWERTRAIN
Engine: General Electric FDL12 (4-cycle) @ 2250 hp Bore & Stroke: 9.0" x 10.5" RPM (Max. / Min.): 1050 / 400
Main Gen.: GT581 / GTA-11 Traction Motors: GE-752 (four) Tractive Force (starting): 85,800 lbs @ 25% Tractive Force (continuous): 90,000 lbs @ 10.7 mph
TRUCKS
Wheel Arrngmnt: B-B (2 Axle) or FB-2 Wheel Dia: 40" Turning Radius (min): 21 degrees Wheelbase: 9'-04"
M/U Capability Dyn. Braking Loco Wgt: 252,000 lbs. Speed: 70 mph / Gear Ratio: 74:18
SPECIFICATIONS / DIMENSIONS
Total Length: 60'-2" Locomotive Wheel Base: ?? Engine Hood Height: 15'-04.5" Cab Heighth*: 14'-09"
Cab Width: 9'-11" Top of Walkway: 5'-07.6" Length over handrails: 10'-03.5" Distance between Truck Centers: ??
M/U Capability: Yes Dynamic Braking: Yes Loco Wgt: 242,000 lbs. Speed: 70 mph / Gear Ratio: 74:18
T/M Blower (2): Mechanical Driven Auxillary Generator: GY27 Air Comp.: Westinghouse 3CDC Air Brake: Westinghouse 26L
CAPACITIES

Fuel Oil: 1700 gal. or 2900 gal.

Lub Oil: 300 gal.

Cooling Water: 350 gal.

Sand: 60 ? cubic feet

NOTES & CREDITS
* Height Dimensions are from top of railhead.

Reference Sources:

  • Extra 2200 South, issue #75
  • GE Advanced Generation, 1989, by James W. Kerr
  • GE Locomotives, volumes 1 & 2, 1981, by James W. Kerr
  • Car & Locomotive Cyclopedia, 1984, by Simmons & Boardman
  • The Modern Locomotive Handbook, 1979, Railway Fuel & Operating Officers Assn.
  • Diesel & Electric Locomotive Specifications, 1981, by F. K. Hudson.
  • GE U23B Technical Manual

Back to Motive Power Rosters

Back to Fallen Flags