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Ford 9N, 2N & 8N Discussion Forum
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8N PTO seal

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Btzj02

11-29-2019 16:13:31




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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




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Btzj02

11-30-2019 19:43:10




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
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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.



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Colin King

12-03-2019 16:36:56




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 Re: 8N PTO seal in reply to Btzj02, 11-30-2019 19:43:10  
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



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Ultradog MN

12-01-2019 04:06:44




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 Re: 8N PTO seal in reply to Btzj02, 11-30-2019 19:43:10  
You need an ORC when using a brush mower. You do not need one for any other type of pto driven implement.



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Colin King

11-30-2019 13:38:19




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
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



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jimtrs

11-30-2019 08:15:51




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
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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.



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That type of shaft is not original. Somebody could have set that up, though.

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Tim PloughNman Daley

11-30-2019 03:56:33




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
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

Tim *PloughNman* Daley(MI)

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Btzj02

11-29-2019 21:38:12




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
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The shaft, bearings, seal and cover all came new and assembled. Poor quality?



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Clifford B.

11-29-2019 21:24:13




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 Re: 8N PTO seal in reply to Btzj02, 11-29-2019 16:13:31  
Did you replace the seal with the new shaft ??

If you didn't the answer is causin the drippin on the floor.............



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