I haven't found the relevant issue of
yet, but I am still looking. So, going on what I remember reading, here goes:
The eastbound Overland was at the platform road after changing locomotives (two VR A2's were up front). The eastbound Overland was then to move into a dead end siding to allow the westbound Overland access to the platform. Before this could happen, they were hit by the westbound Overland (with another 2 VR A2's up front). I can only guess as whether the crew missed the signal or ignored it, but whatever the reason, the two trains collided head on. All four locomotives were condemmed.
As a consequence, 2 R class locos were sent from Dimboola to Serviceton to haul the eastbound Overland. It seems the R class did a good job, as they were assigned to the Overland until the diesels took over.
I'm still looking for that issue of The Recorder...