New Zealand DF Class Locomotive (1979) - Sub-classes

Sub-classes

In the early 2000s a number of DFTs were fitted with the Maxitrax wheelslip control and received an internal sub-classification of DFM. This was used in the Amicus computer system only, and the classification was initially not applied to the locomotives themselves which remained identified as DFT. Although Maxitrax has since been removed from these locomotives the units that were classed as DFM have had the designation applied to them when repainted into the KiwiRail livery.

In 2006 Toll Rail began installing the Brightstar engine management system into a number of DFT class locomotives, with these locomotives then officially reclassified as DFB. Both of these practices have been continued by KiwiRail.