Hello to all. I am replacing the pto pump seal in my late 1953 john deere 60. I have read several posts here and there about the installation of the seal and whether ot not to use two of them. I just installed one seal with the lip facing the pump. I can install another if i need to but was looking and it looks like another seal would block off the hole for the port that comes from where the gears are. I am running 140 weight oil in the transmission. Should i add another seal in the opposite direction as this one or do you guy think one will be ok. Also wondering id that port is blocked off by another seal will that hurt anything. Thanks for the help.