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9n PTO cap/guard

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Author  [Modern View]

06-07-2020 12:13:33

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When this cap is tight, there is a gap of about .08 between the flange on the cap and the tractors PTO housing. The depth of the cap, (threaded part) from the end, to the flange is .82 and the depth of the threaded housing is .74. It always looks like it is loose when it is indeed tight. Is this the wrong cap for this tractor? Is there supposed to be a gasket on it that would be a .10 thick to fill the gap? Or is the end of the cap supposed to bottom out in the housing.

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Tim PloughNman Daley

06-08-2020 13:37:25

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 Re: 9n PTO cap/guard in reply to sde, 06-07-2020 12:13:33  
Only two OEM PTO caps were used, all others are aftermarkets. The first 9N cap was cast iron and shorter. The 2N introduced the steel version, longer, and used thru the NAA. When the 1-3/8 PTO splined shaft was introduced, it was a tad longer than the original hence they offered a different cap -this is the one with the squared off end. Was your shaft changed and you are using the OEM cap?


NOTE: The 9N-726 cap is cast iron; the 2N-726 cap is stamped steel. Both have identical Thread Size of 2-5/8"-12 UN 2A.

Tim Daley(MI)

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06-09-2020 05:31:54

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 Re: 9n PTO cap/guard in reply to Tim PloughNman Daley, 06-08-2020 13:37:25  
The one on my 9n is cast iron and looks like the one on the left. I will have to check how far out the pto shaft sticks out from the tractor. It would still be the original pto shaft. The previous owner did not repair anything at all. He ran them into the ground and then replaced the tractor with another one.

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Shaun Wallace

06-07-2020 12:54:47

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 Re: 9n PTO cap/guard in reply to sde, 06-07-2020 12:13:33  
Think there was 4 different styles of pto covers used thru N production. Some one has posted pic of all that were used.

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06-07-2020 18:14:53

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 Re: 9n PTO cap/guard in reply to Shaun Wallace, 06-07-2020 12:54:47  
I found a schematic that showed the cap having straight sides. Mine has a flange and so it must be for another tractor.

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