The DFZ class are ex QR 2300 series loco's, rebuilds of even earlier loco's that were forwarded to WA during the ARG days. DFZ's 2404, 2406 and 2407 had their cabs rebuilt with a taller roof during refurbishment for WA, a mod not applied to the other DFZ's. The 'raised roof' DFZ's seem to have entered service but then had their cabs altered at a later date. In March 2010 DFZ 2407 was trucked back from Qld.
The renumberings from 2300's were as follows:
DFZ 2401 - 2356
DFZ 2402 - 2349
DFZ 2403 - 2361
DFZ 2404 - 2370
DFZ 2405 - 2372
DFZ 2406 - 2373
DFZ 2407 - 2374
Drive Type: Diesel Electric - DC
Engine: EMD 12-645E3
Generator: EMD AR10
Traction Motors: EMD D29
Horse Power: 2,250hp
Weight: 94.5t
Max rated speed: 100km/h
Builders Model: GTL22C-AC