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8N PTO seal

Btzj02

Btzj02

Member
I replaced my PTO shaft because I wanted the standard 1 3/8 splined end. The original was a straight shaft with a keyway. What is considered a "Normal" leak for the PTO seal? I gather most all leak. I would say mine is leaking 2 to 3 drops every 24 hours. Do I screw the cover on and call it good, or do I go after this leak and try and fix it?
Joe
 
(quoted from post at 22:24:13 11/29/19)
Did you replace the seal with the new shaft ??
If you didn't the answer is causin the drippin on the floor.............
Click to expand...
The shaft, bearings, seal and cover all came new and assembled. Poor quality?
 
It wouldn't be a FORD TRACTOR without a few oil leaks... ; > ) Was the PTO leaking before you switched it out? Was it better or worse after you replaced it? Did you
install the seal and bearing correctly? The OEM Ford N's came with the standard 1-1/8" splined PTO shaft. The ASAE made the 1-3/8" change for PTO operated implements
in the early 8N era. You could have saved yourself a lot of work by simply getting a sleeved adapter -SEE PICTURE. If you use a mower or brush hog or anything with a
PTO powered implement, best to invest in an ORC. BTW, what is an "... original ... straight shaft with a keyway."? More INFO and Pictures please

1-1/8? SPLINE ADAPTER TO 1-3/8?
ayTdrCch.jpg

Tim *PloughNman* Daley(MI)
 
(quoted from post at 20:13:31 11/29/19) I replaced my PTO shaft because I wanted the standard 1 3/8 splined end.
Click to expand...

You don't say how long ago you replaced it, but if recent, it shouldn't leak. They will all eventually leak, but a new assembly should be good for years. Could be the seal, the collar the seal rides on, I suppose even a bad bearing chewed up the seal. Though I think you would have noticed bearing that bad during the install.
Double check if the leak is between the shaft and seal. Possible it's leaking where the flange mounts to the housing.
Also possible you got a crack or other damage.



The original was a straight shaft with a keyway.
Joe
Click to expand...

That type of shaft is not original. Somebody could have set that up, though.
 
It shouldn't leak that much. Pull it and make sure the mating surfaces and the gasket are clean. Use a solvent to get the grime, rust, and oil out of there. There's nothing wrong with applying a thin layer of Permatex High Tack to the gasket if you continue to have a leak.

Colin
 
(quoted from post at 14:38:19 11/30/19) It shouldn't leak that much. Pull it and make sure the mating surfaces and the gasket are clean. Use a solvent to get the grime, rust, and oil out of there. There's nothing wrong with applying a thin layer of Permatex High Tack to the gasket if you continue to have a leak.

Colin
Click to expand...

ORC is on my Christmas list or if that fails it is on my to buy list before spring. Here are the pictures of the old PTO assembly and the new. The new one was installed less than a month ago but the machine has not been started. the leak is definitely coming through the shaft seal. I can stop the leak by installing the screw cover but the cover fills up with oil. My only thought is that it has been cold here and maybe the seal is stiff. Might need to run and be warmed up to seal?! I did pull shaft to rebuild hydraulic pump and the bearings are in very good shape. the whole assembly is brand new.
mvphoto45981.jpg


mvphoto45982.jpg
 
If it's leaking through the shaft seal, I would find that unacceptable. Suggests poor manufacturing. I would call your supplier and complain and get a replacement.

Colin
 
Just couldn't stand the oil leak. Ordered a new seal and clip rings from YT. I tried the trick of raising the rear wheels to prevent loss of oil but I must not have gone high enough. Lots of oil on ground.
I found the seal in backwards and the outer clip ring was missing so I probably screwed the PTO cap in too far causeing the displacement of the seal spring. Will recheck leak in a few weeks! Attached is the spring I mentioned and the new seal with snap ring installed.
mvphoto47581.jpg


mvphoto47582.jpg
 
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