1948 8N HITCH LOWER LINK OIL LEAK

Hope someone can help I have a 48 8n runs great but I am loosing Hydro fliud form what the manual call the hitch lower link on the left side of me tractor, is there an oil seal that can be replaced to stop this leak? thanks for a reply

That leak can really only be fixed by pulling the left trumpet, pulling out the bolt and either getting a new or reusing the old one. You need to clean the hole, its tapered and the stud end that is tapered , put gasket cement on both parts, and tighten up the inside nut hard and put in a cotter pin. Make sure the outside end is pushed in very tightly, tapped with a hammer. At the same time while you are in there the other side shud be done as well.

To stop the leak, you need to replace the pin. To do that, you need to remove the axle trumpet as DGinVT said. If you remove the left trumpet, you can do them both at the same time. It's held on by a castelated nut w/ a cotter key on the inside.

Drain the fluid (see tips 3 & 4, below. Resist the temptation to park it nose-down in a ditch or to jack up the rear end. If you have a bad front transmission seal, you will fill the bell housing with hydro fluid. Then you get to replace the clutch)

Remove the left trumpet & slide the differential gear out. (an engine hoist is a good idea) Make sure the holes are not wallowed out or you will be in there again. I hear Loctite Quick Metal 660 Retaining Compound, Press Fit Repair.works.Or if the axle housing is really worn, you can use Loctite Fixmaster Fast Set Steel Epoxy, but I've never had the problem so I can't say for sure. Referring to the picture, the pin you need to replace is p/n 563. The hole which may be wallowed out is in the trumpet, p/n 4010 or 4011. The nut that holds the pin on (which is inside the differential housing) is p/n 33860-S. The cotter key is p/n 72035-S. Torque the nut on the new pin to 150 lbs before you put the cotter key in. Wipe the new trumpet gaskets w/ warm water until they are sufficiently pliable to stretch over the studs w/o breaking. Let them set a few minutes before you put them on. Make sure you use your favorite gasket sealer. Torque the 11 trumpet studs to 40 lbs.

And, beware of mission creep: the rear end is probably full of 50+ years of crude, so have some kerosene & rags ready to clean it out!

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thank you both for the info I will see what I can do!

it is only leaking on the left side, so if I park it with the left side up hill it does not leak, so I will do that for now. I do go thru about 5 gal of fluid a year. So I do want to fix it right, she runs great! thanks again

" so if I park it with the left side up hill it does not leak"

You might be saving some fluid, but you will probably be replacing the wheel seals & brake shoes on the right side by doing that. (see tip # 4)

If you have the tractor parked on level ground with 5 gallons of fluid, the fluid is in the trumpet right at the bottom of the seal. By parking it on uneven ground, you are immersing the right seal in fluid.
75 Tips