Introduction
They had a wheel arrangement of (2'Co)(Co'2) under the UIC classification system, generated 1120 kW (1500 hp) of power, and could achieve a maximum speed of 97 km/h. They started the process of displacing steam motive power from main lines in New Zealand, but were soon displaced themselves by the DA class of 1955.
Initially, 31 DF locomotives were ordered, but this order was amended to 10 DFs and 42 DG locomotives. The DG class in appearance was essentially half a DF, with a similar Bulldog nose cab design. The DF locomotives were lighter than the DAs and were used to haul freight trains on lines in Northland and the Bay of Plenty from which the DAs were prohibited. Their only trips to the South Island were to visit Dunedin for maintenance.
Read more about this topic: NZR DF Class (1954)
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