1,000 mm (3 ft 3+3⁄8 in) 3 ft 6 in (1,067 mm) 4 ft 8+1⁄2 in (1,435 mm)
Driver dia.
40 in (1,016 mm)
Wheelbase
8 ft 0 in (2.44 m) (Each truck B-B) 10 ft 05 in (3.18 m) (Each truck A1A-A1A)
Length
38 ft 0 in (11.58 m)
Width
9 ft 8+3⁄4 in (2.97 m)
Height
12 ft 2+11⁄16 in (3.73 m)
Loco weight
124,000 lb (56,250 kg) (62T, G18U6) 134,100 lb (60,830 kg) (67.5T, G18U) 142,900 lb (64,820 kg) (71.45T, G18W)
Fuel capacity
500 US gal (1,900 L; 420 imp gal)
Lubricant cap.
130 US gal (490 L; 110 imp gal)
Water cap.
126 US gal (480 L; 105 imp gal)
Sandbox cap.
9 cu ft (0.25 m3)
Prime mover
GM 8-645E
Engine type
V8 2-stroke diesel
Aspiration
Roots blower
Generator
GM D25
Traction motors
GM D29 (4)
Cylinders
8
Loco brake
Straight air
Train brakes
Air or Vacuum schedule 26-LA
Performance figures
Power output
1,000 hp (750 kW)
Career
Locale
South America, Middle East, Africa, Asia
Disposition
Some scrapped, many still operating
The EMD G18 was an export locomotive introduced by GM-EMD in the late 1960s. The standard EMD suffixes applied after the G18 designation to indicate if the customer purchased locomotives with specific traction motors to fit narrow gauge (U) or broad gauge (W) rails. An (L) indicates a locomotive built with a lightweight frame, and (6) indicates A1A-A1A trucks. The similar EMD GA18 was a G18 designed as an extremely light locomotive with low axle loading and used freight car trucks driven by a cardan shaft and underframe mounted traction motors like its predecessor, the EMD GA8. A further variation was the G18B. They are powered by an EMD 8-645E prime mover rated at 1100 bhp and 1000 hp for traction[1] and were produced with A1A-A1A or B-B trucks.
Several countries have purchased these locomotives.[2]
^Zurnamer, Bernard (1987). Electric And Diesel Locomotives of South Africa. p. 74.
^"G18 Order Summary". The UNofficial EMD Homepage.
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