Alexandra firefighters are pictured inspecting the machine after it caught fire at an Alexandra Stone quarry in Crawford Hills Rd, about 15km from Alexandra,
A neighbour reported hearing a loud explosion when the fire began, about 10.30am.
Two fire crews from Alexandra took about half an hour to put the fire out, Mr Burdett said.
However, he said it was lucky the digger had been parked on gravel at the time, as any fire on a grassed area could have spread and been ``a much different story'' because of the extreme fire risk in the region.