I need some info please, my cub oil filter top started leaking around the bolt that goes thru it to fasten it to the housing, I looked at the diagram to see if there was a washer that was supposed to be there, but none showed to be, so I ordered a new top. well, a used one, this top was taken off a running cub, but its top is dished up, mine is dished down, I ordered it because there is a possibility that mine has the wrong one on it, but I got to thinking, the top also located the oil filter doesn't it? what filter do I need to use with the dished up filter top? and is there or is there not supposed to be a copper washer or o ring between the bolt head and the housing top? next I don't see any tractor parts on the left corner here, what happened, or is it just me?