They have been hired to a variety of operators and have operated in all mainline states. Most entered service on lease to FreightLink hauling iron ore trains from Pine Creek to Darwin.[4] As at 2010, some remained on hire to FreightLink while others were engaged in hauling grain trains in other states. All are named after Australian racehorses.[5]
As at February 2022, nine of the 12 were being used by Qube.[6] As at September 2023, five are operating on the broad gauge With the Numbers 351, 353, 356, 357 & 360. with the other seven on standard gauge With the Numbers 352, 354, 355, 358, 359, 361 & 362 .[7]
Avteq designed a second locomotive class, but none were ever manufactured.[8] The company was deregistered in 2013.[9]