This is one of the usual orange jobs probably dating back to the 70"s with what looks like a half horse motor and belt drive. My question is the center bearing. The sides have zerks fine and dandy. What I am interested in is the center bearing. Mine has no zerk there rather a 7/16" or so threaded hole. The hole is plugged with a square headed bolt. Of course the bolt could have come from anywhere but the shape of the attachment itself makes me think it might be oil bath. It is about 1 1/2" in diameter and about 6" which seems a bit odd for a greased bearing and that fill seems large too. What say ye, grease or GL5