Commonwealth Railways NB class

The Commonwealth Railways NB class originated in a shipment of four 0-6-0, 1067 millimetres (3 feet 6 inches) gauge, saddle tank steam locomotives built by the Vulcan Iron Works of Wilkes-Barre, Pennsylvania.

[2] In 1957, the frame and wheels of NB30 were used as the basis of a small diesel-hydraulic locomotive designed and built at Commonwealth Railways' Port Augusta workshops.

[note 2] Retaining its number, NB30 was initially used in recovering rails from the closed Brachina–Hawker section of the Central Australia Railway, after which it was assigned to Quorn for shunting work.

It was then transferred to Port Augusta for use as a workshops shunter, where it was withdrawn from service in 1972.

As of 2020[update], the heritage railway employed the locomotive on shunting duties.