In Reply to: 3 point hitch pin loose and leaking posted by Daniel Romans on August 02, 2022 at 18:24:04:
Do you mean where the lift arm is connected to the diffy case? There are no seals there if so. The arms are attached via a special shaft, p/n 9N-563 which has a tapered length inside the housing hole. The 563 pin is ‘sealed’ by the taper on it. You sometimes have to get in there to tighten it up and it is a bear of a project. The inside of the shaft is threaded for a castle nut, washer, and cotter pin set up. Often the project involves removing the axle trumpet to get access. You sometimes can get lucky if your hands are small enough to reach inside thru the side inspection cover, and get to the nut but only on the right side. I forget, Maybe it is the LH side that you can get to both sides. A stub handle wrench is needed to tighten the nut while holding the outside nut with another wrench, but then that limits you on gaining enough stroke to apply torque. If you are really lucky, you can try a socket and force it over the nut by breaking the cotter pin. Even if you get lucky, you still have to remove the left axle trumpet to get to that side so if you want to do both sides, I'd suggest removing both axle trumpets. Then, with the trumpets off, I’d do a gasket job while they're off.
Maybe I am missing your question, but if the lift arms are leaking that bad -a gallon every few months seems serious to me, then I’d look into performing this task. Letting it go with heavy use may result in wallowing out the tapered hole and then you may need new trumpets. You may also look into the gaskets behind the inspection covers and the main drains underneath. You have two -one large one with the gasket and a small pipe plug back under the diffy case but no gasket there. The N's also were notorious for axle seals failing and oil getting on brakes. Often you see evidence of oil leaking down there as well. Pictures tell a better story so if you can post, we'll all be on the same page. If you can't post, email me them and I will post. Be sure they are in digital jpeg format...
FORD TRACTOR 3-PT LIFT SYSTEM:
FORD 8N TRACTOR AXLE TRUMPET EXPLODED VIEW:
FORD TRACTOR P/N 8N-563 LIFT ARM PIN KIT: