1650 Hydraulics

I've had more of those apart than I'd care to talk about. There are two large gaskets, one between the pan and tractor casting itself and one between the pan and the top cover. Their is a skinny piece of the gasket that goes across the top (best way I can describe it)towards the front of the tractor. If this piece was broken, it would dump oil into the trans/rear end. Anywhere else the gasket was broken would cause oil to leak down along the outside of the whole tractor casting. This is not a likely cause of the leak. It is basically a 50/50 between the pump gasket and a hole in the pan. If you have a hole in the pan- the pan is not cheap to replace- braze it or get someone to braze it for you.