New Zealand DF class locomotive (1979)

Specifications
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	Co-Co
Gauge	3 ft 6 in (1,067 mm)
Length	16.7 metres (54 ft 9 in)
Adhesive weight	86.4 tonnes (85.0 long tons; 95.2 short tons) (DF) ; 87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Loco weight	86.4 tonnes (85.0 long tons; 95.2 short tons) (DF) ; 87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Prime mover	GM 12-645E (DF) ; GM 12-645E3C (DFT)
RPM range	900 rpm
Engine type	V12 Diesel engine
Aspiration	Roots-type supercharger (DF) ; Turbocharger (DFT)
Displacement	126.84 litres (7,740 cu in)
Generator	AR6-D14
Traction motors	Six D29CCT
Cylinders	12
Cylinder size	230 mm × 254 mm (9.1 in × 10.0 in)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	General Motors Diesel (GMD), Canada
Model	DF EMD GL22MC; DFT EMD GT22MC
Build date	1979 - 1981
Rebuilder	Tranz Rail (Hutt Workshops)
Rebuild date	1992 - 1997
Number rebuilt	30 (rebuilt as the DFT class)

New Zealand DF / DFT class (General Motors)
New Zealand DF / DFT class (General Motors)
	DFT7295 departing the Ashburton yard, 20 February 2013. Note the enlarged driver's side windscreen.
Power type
Type and origin
Power type	Diesel-electric
Builder	General Motors Diesel (GMD), Canada
Model	DF EMD GL22MC; DFT EMD GT22MC
Build date	1979 - 1981
Rebuilder	Tranz Rail (Hutt Workshops)
Rebuild date	1992 - 1997
Number rebuilt	30 (rebuilt as the DFT class)
Configuration:;
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	Co-Co
Gauge	3 ft 6 in (1,067 mm)
Length	16.7 metres (54 ft 9 in)
Adhesive weight	86.4 tonnes (85.0 long tons; 95.2 short tons) (DF) ; 87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Loco weight	86.4 tonnes (85.0 long tons; 95.2 short tons) (DF) ; 87.6 tonnes (86.2 long tons; 96.6 short tons) (DFT)
Prime mover	GM 12-645E (DF) ; GM 12-645E3C (DFT)
RPM range	900 rpm
Engine type	V12 Diesel engine
Aspiration	Roots-type supercharger (DF) ; Turbocharger (DFT)
Displacement	126.84 litres (7,740 cu in)
Generator	AR6-D14
Traction motors	Six D29CCT
Cylinders	12
Cylinder size	230 mm × 254 mm (9.1 in × 10.0 in)
Maximum speed
Performance figures
Maximum speed	113 km/h (70 mph)
Power output	1,230 kW (1,650 hp) DF ; 1,800 kW (2,400 hp) DFT
Tractive effort	198 kN (45,000 lbf)
Number in class
Career
Number in class	30 (20 DFBs and 10 DFTs)
Numbers	1651 - 1670 (original DF) ; 6006 - 6317 (TMS DF) ; 7008 - 7348 (DFT)
Locale	All of New Zealand
First run	June 1979
Disposition	22 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. Between 1992 and 1997, all the locomotives were rebuilt as the DFT class, a turbocharged version of the DF.

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