New Zealand DC class locomotive

New Zealand DC class
DCP 4801 and DC 4346 with a mainline shunt south of Christchurch
Type and origin Power type Diesel-electric Builder General Motors Canada Model EMD G22AR Build date 1961 – 1967 as DA class Rebuilder Clyde Engineering, Rosewater Hutt Workshops Rebuild date 1977 – 1982 Number rebuilt 85
Specifications Configuration: ​  • UIC A1A-A1A Gauge 3 ft 6 in (1,067 mm) Wheel diameter 1.25 metres (4 ft 1 in) Length 14.10 metres (46 ft 3 in) Width 2.72 metres (8 ft 11 in) Height 3.76 metres (12 ft 4 in) Adhesive weight 60.0 tonnes (59.1 long tons; 66.1 short tons) Loco weight 82.0 tonnes (80.7 long tons; 90.4 short tons) Fuel type Diesel Prime mover EMD 12-645C or EMD 12-645E RPM range 900 rpm Engine type V12 Diesel engine Aspiration Normally aspirated (Roots blower) Cylinders 12 Cylinder size 230 mm (9+1⁄16 in) x 250 mm (9.8 in)
Performance figures Maximum speed 100 km/h (62 mph) Power output 1,062 kW (1,424 hp) (645C) 1,230 kW (1,650 hp) (645E) Tractive effort 140 kN (31,000 lbf)
Career Number in class 85 Numbers DC 4006 – 4951 (TMS) DC 1551 – 1599 (original) First run 1978 Disposition In service: 18 Withdrawn: 3 Scrapped: 52 Preserved: 6 Sold overseas: 9

The New Zealand DC class locomotive^{[nb 1]} is a type of diesel-electric mainline locomotive on the New Zealand rail network, operated by KiwiRail on freight trains, and formerly on long-distance passenger trains. The class was rebuilt from the DA class in the late 1970s and early 1980s, mainly in Australia. After the DA class, they were the most numerous class of diesel locomotive on New Zealand's railway network and remained numerically dominant until the mid-2010s when withdrawals began.
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