New Zealand DF class locomotive (1979)

This article is about the locomotive first introduced in 1979. For the 1954 locomotive, see NZR DF class (1954).

New Zealand DF / DFT class (General Motors)
DFT7295 departing the Ashburton yard, 20 February 2013. Note the enlarged driver's side windscreen.
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Diesel (GMD), Canada
ModelDF EMD GL22MC
DFT EMD GT22MC
Build date1979 - 1981
RebuilderTranz Rail (Hutt Workshops)
Rebuild date1992 - 1997[1]
Number rebuilt30 (rebuilt as the DFT class)
Specifications
Configuration:
​
 • UICCo′Co′
 • CommonwealthCo-Co
Gauge3 ft 6 in (1,067 mm)
Length16.7 metres (54 ft 9 in)
Adhesive weight86.4 tonnes (85.0 long tons; 95.2 short tons) (DF)
87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Loco weight86.4 tonnes (85.0 long tons; 95.2 short tons) (DF)
87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Prime moverGM 12-645E (DF)
GM 12-645E3C (DFT)
RPM range900 rpm
Engine typeV12 Diesel engine
AspirationRoots-type supercharger (DF)
Turbocharger (DFT)
Displacement126.84 litres (7,740 cu in)
GeneratorAR6-D14
Traction motorsSix D29CCT
Cylinders12
Cylinder size230 mm × 254 mm (9.1 in × 10.0 in)
Performance figures
Maximum speed113 km/h (70 mph)
Power output1,230 kW (1,650 hp) DF
1,800 kW (2,400 hp) DFT
Tractive effort198 kN (45,000 lbf)
Career
Number in class30 (20 DFBs and 10 DFTs)
Numbers1651 - 1670[n 1][2] (original DF)
6006 - 6317 (TMS DF)
7008 - 7348 (DFT)
LocaleAll of New Zealand
First run1979
Disposition22 DFBs in service
3 DFTs stored
1 DFT scrapped
4 DFTs shipped overseas

The New Zealand DF class locomotive of 1979 is a class of 30 Co-Co diesel-electric locomotives built by General Motors Diesel of Canada between 1979 and 1981.[2] Between 1992 and 1997, all the locomotives were rebuilt as the DFT class, a turbocharged version of the DF.[1]

The class should not be confused with the English Electric NZR DF class of 1954; as all of the old DF locomotives had been retired by mid-1975, the "DF" classification was free to be re-used.[3]

  1. ^ a b Parsons 2002, p. 34.
  2. ^ a b McClare 1980, p. 16.
  3. ^ McClare 1980, p. 15.


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