Posted 6/11/2018 12:38 (#6806480 - in reply to #6806408) Subject: RE: Shaver post driver return line on JD 6140D
NEMO
I've not checked to see what the threads are under the fill cap but if they are pipe threads it looks like that would be an easy place for you to dump the oil.
On second thought you may want to check and see if that cap is the only vent for the housing.