GE B23-7

BNSF 4258 switching the intermodal yards at Commerce, California, February 15, 2005.

Type and origin
Power type	Diesel-electric
Builder	GE Transportation Systems GE de Brazil
Model	B23-7
Build date	SEP 1977 – DEC 1984
Total produced	U.S. - 412 units; Mexico - 125 units.

Specifications
AAR wheel arr.	B-B
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm) standard gauge 1,600 mm (5 ft 3 in), Brazil
Length	62 ft 2 in (18.95 m)
Prime mover	GE FDL-12
Engine type	V12 diesel
Cylinders	12

Performance figures
Power output	2,250 hp (1,680 kW)

Career
Nicknames	B-boat

The GE B23-7 is a diesel locomotive model that was first offered by GE in late 1977. Featuring a smaller 12 cylinder version of the FDL engine, it is the successor to GE's U23B 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 successful EMD GP38-2. General Electric also produced a variant, the BQ23-7, no.5130-5139, for the Seaboard Coast Line. A total of 537 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 as Ferrocarriles Nacionales de México no.10047-10052 and no.12001-12011.

Southern Railway's 54 units had Southern's "standard" high-short-hoods.

These engines frequently are rebuilt as Control Car Remote Control Locomotive (CCRCL) due to their low value on the used locomotive market.

Original owners

Owner	Quantity	Numbers	Notes
Atchison, Topeka and Santa Fe Railway	69	6350-6418	6405-6418 last B23-7s built
Conrail	141	1900-2023, 2800-2816	2800-2816 first B23-7s built
Ferrocaril Unidos del Sureste	3	522- 524
Louisville and Nashville Railroad (Family Lines)	15	5115-5129
Missouri Pacific Railroad	85	2289-2358, 4670-4684	2289-2358 renumbered to 4600-4669
Ferrocarriles Nacionales de México	122	1-01-1-08, 9130-9180, 10001-10052, 12000-12011
Providence and Worcester	1	2201
Seaboard Coast Line Railroad (Family Lines)	29	5100-5114, 5130-5139 (BQ23-7), 5140-5153
Southern Railway	54	3970-4023
Southern Pacific Railroad	15	5100-5114
Texas Utilities	2	3306–3307

Diesel locomotives built by GE Transportation / GE Rail (GE)

Industrial and switch engines	60-ton boxcab 100-ton boxcab 600-hp centercab 1000-hp centercab DEY-2 EN-6 25-ton 35-ton 43-ton 44-ton 45-ton 50-ton 60-ton 65-ton 70-ton 80-ton 95-ton 100-ton 110-ton 125-ton 126-ton 128-ton 1800-hp transfer 2000-hp transfer U5B U6B

Universal Series	UM6B U9B U10B U12B U13B UD18 U18B U23B U25B U28B U30B U33B U36B UM12C U12C U14C U15C U17C U18C U18C1 U20C U20C1 U23C U25C U26C U28C U30C U33C U36C U50C U50

Passenger locomotives	U28CG U30CG U34CH P30CH B32-8WH Genesis series (P40DC, P32AC-DM, P42DC)

Dash 7 Series	B23-7 BQ23-7 B30-7 B30-7A B36-7 C30-7 C30-7A C36-7

Dash 8 Series	B32-8 B39-8 B40-8 B40-8W C32-8 C39-8 C40-8 C40-8M C40-8W C40-8.5W C41-8W C44-8W

Dash 9 Series	C40-9 C40-9W C44-9W BB40-9W C-38AChe

AC series	AC4400CW AC6000CW C30ACi C44ACi

Evolution Series	ES40ACi ES40DC ES44DC ES44DCi ES44AC ES44C4 ET44AC ES59ACi

PowerHaul Series	PH37ACmi PH37ACi PH37ACmai

Indonesian series	U18A1A C18MMi C20EMP CM20EMP

(see also: List of GE locomotives)

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