4833 is an Alco model DL531 and was built in October 1961 by A.E. Goodwin Pty Ltd.
The NSWGR built 165 48 class locomotives for branch line passenger and freight train haulage and they were considered to be the backbone of the NSW railways.
This class of locomotive is capable of running on all NSW rail lines and is a popular performer when used on heritage trains.

4833 is owned by Goodwin Alco.