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TheGE B23-7 is adiesel locomotive model that was first offered byGE in late 1977. Featuring a smaller12 cylinder version of the FDL engine, it is the successor to GE'sU23B produced from early 1968 to mid 1977, but at 62 ft 2 in (18.95 m) long is exactly 2 ft 0 in (0.61 m). longer. It competed with the very successfulEMD GP38-2. General Electric also produced a variant, theBQ23-7,[1][2] No. 5130-5139, for theSeaboard Coast Line. A total of 536 B23-7's were built for 9 U.S. customers and 2 Mexican customers.
A B23-7A is a 12-cylinder B23-7 with horsepower boosted to 250 per cylinder or 3,000 horsepower. In 1980 the Missouri Pacific ordered three B23-7A's (#'s 4667-4669, later UP #'s 257-259) and tested them system-wide. The result was the GE model B30-7A, B30-7 with a 12-cylinder FDL prime mover. They were not renumbered into the B30-7A series on the MP because they lacked Sentry Wheel Slip and had different engine governors.
13 B23-7's were built by GE of Brazil in Dec.1979 for United South Eastern Railways(FUS) no.522-524 and National Railways of Mexico(NdeM) no.9130-9139. 17 B23-7s were built from GE kits in Mexico asFerrocarriles Nacionales de México no.10047-10052 and no.12001-12011.
Southern Railway's 54 units had Southern's "standard" high-short-hoods.
Ohio Central #4092, a B23-S7 "Super Seven," is owned by theAge of Steam Roundhouse inSugarcreek, Ohio. It was rebuilt from formerWestern PacificU23B #2252.[3]
| Owner | Quantity | Numbers | Notes |
|---|---|---|---|
| Atchison, Topeka and Santa Fe Railway | 69 | 6350-6418 | 6405-6418 last B23-7s built Transferred toBNSF |
| Conrail | 141 | 1900-2023, 2800-2816 | 2800-2816 first B23-7s built Three sold toMetro-North, others split betweenCSX &NS. |
| Ferrocaril Unidos del Sureste | 3 | 522- 524 | |
| Louisville and Nashville Railroad (Family Lines) | 15 | 5115-5129 | Transferred to CSX |
| Missouri Pacific Railroad | 85 | 2289-2338, 4650-4684 | 2289-2338 renumbered to 4600-4649 Transferred ToUnion Pacific |
| Ferrocarriles Nacionales de México | 122 | 1-01-1-08, 9130-9180, 10001-10052, 12000-12011 | |
| Providence and Worcester | 1 | 2201 | Transferred toRailroad Museum of New England for parts |
| Seaboard Coast Line Railroad (Family Lines) | 29 | 5100-5114, 5130-5139 (BQ23-7), 5140-5153 | |
| Southern Railway | 54 | 3970-4023 | High Hoods. Transferred to NS |
| Southern Pacific Railroad | 15 | 5100-5114 | |
| Texas Utilities | 2 | 3306–3307 |