GE U18B

Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8 1&fras1;2 in (1,435 mm) standard gauge
Length	54 ft 8 in (16.66 m)
Prime mover	GE 7FDL
Engine type	V8 4-stroke diesel
Aspiration	Turbocharger
Displacement	5,344 cu in (87.57 L)
Cylinders	8
Cylinder size	9 in × 10.5 in (228.6 mm × 266.7 mm)
Transmission	DC generator, DC traction motors
Loco brake	Straight air, Dynamic
Train brakes	26-L Air

GE U18B
	A Maine Central Railroad U18B, on lease to the short-lived Niagara and Western New York Railroad, July 2002
Type and origin
Power type	Diesel-electric
Builder	General Electric
Model	U18B
Build date	March 1973 – October 1976
Total produced	163
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	4 ft 8 1&fras1;2 in (1,435 mm) standard gauge
Length	54 ft 8 in (16.66 m)
Prime mover	GE 7FDL
Engine type	V8 4-stroke diesel
Aspiration	Turbocharger
Displacement	5,344 cu in (87.57 L)
Cylinders	8
Cylinder size	9 in × 10.5 in (228.6 mm × 266.7 mm)
Transmission	DC generator, DC traction motors
Loco brake	Straight air, Dynamic
Train brakes	26-L Air
Performance figures
Power output	1,800 hp (1.34 MW)
Career
Locale	North America

The GE U18B diesel-electric locomotive was introduced by GE Transportation as a branch line roadswitcher in 1973. It was the only North American locomotive powered by the 8-cylinder 7FDL engine.

Original Owners

Railroad	Quantity	Numbers	Notes
Maine Central Railroad	10	400–409	Blomberg trucks
Ferrocarriles Nacionales de México	45	9000–9044	AAR type-B trucks
Providence and Worcester Railroad	1	1801	FB-2 trucks
Seaboard Coast Line Railroad	105	250–261, 300–392	325-392 with Blomberg trucks, all others FB-2
Texas Utilities	2	101–102	AAR type-B trucks

"Chapter 1". Locomotive Service Manual: Running Maintenance and Trouble-Shooting for Series-7 Road Locomotives. GEK-30150. General Electric Company. 1978.
GE Transportation. Operating Manual - Diesel-Electric Locomotive - GEJ-3856C (1973).