The Queensland Railways 4D9 class locomotive was a class of 2-4-2T steam locomotives operated by the Queensland Railways.

History In February 1881, two Dübs & Co two 2-4-2T locomotives entered service on the Bundaberg Railway. Per Queensland Railway's classification system they were designated the 4D9 class, the 4 representing the number of driving wheels, the D that it was a tank locomotive, and the 9 the cylinder diameter in inches.

Class list WorksnumberBundaberg RailwaynumberSouthern & WesternRailway numberQueensland RailwaysnumberIn serviceNotes1414111February 1881Sold July 1895 to Bingarra Sugar Mill14152131February 1881Sold August 1894 to CSR, Childers, resold to Public Works Department, Tasmania for Macquarie Harbour breakwater construction, sold May 1941 to sawmiller R Howard, Zeehan, currently statically displayed by Don River Railway4D9 131 Australian Steam

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