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Order Ford NAA Parts Online

Rear Seal on NAA

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02-28-2000 20:16:51

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Overhauled motor and rear seal leaks bad !
Got optional rubber seal from Ford.
Ordered two of them, have used them both.
Still leaks. Should I go back with rope
seal again? Tough to install with crank
in place. Any suggestions ?
Has anyone had this problem? Carlos

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03-04-2000 19:26:58

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 Re: Rear Seal on NAA in reply to Carlos , 02-28-2000 20:16:51  
As you probably know it is almost impossible to install the top rope seal while the crank is in the tractor and it not leak because if it is pulled in with the seal pullet tool it streatches the seal and it will be loose.
There is a solution to the delima. The TO Ferguson engines with the contentil engine used a cotton roping seal for the top seal just so it could be installed with the crank installed.Cotton roping is the first form the cotton is made into when in the process of being manufactured into yarn.The roping in the Ferguson gasket was about the size of the middle finger and soft and loosely wound. The way it was installed was with a soft brass welding rod bent slightly on the end to the curve of the crankshaft. You started packing the roping up into the seal groove on one side untill you could no longer get any more into the groove from that side. Then you went to the other side and packed it good and tight with the roping till that side was full. You then put the regular roping seal in the beaing cap and torqued it down. I never had one to leak. Did as good or better than the rope being put in before the crankshaft.

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02-29-2000 16:51:40

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 Re: Rear Seal on NAA in reply to Carlos , 02-28-2000 20:16:51  
Did you check the drain hole in the main bearing cap?
Good luck

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02-29-2000 12:24:19

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 Re: Rear Seal on NAA in reply to Carlos , 02-28-2000 20:16:51  
Did you put them in backwards? I just installed a seal in a short block I bought and the taller side of the seal went toward the engine. Make sure that the seal halves are at a 45 degree angle. Also it was easier to install the seals between the bearing cap and the block if the bearing cap wasn't completely torqued down.

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02-28-2000 20:28:31

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 Re: Rear Seal on NAA in reply to Carlos , 02-28-2000 20:16:51  
Carlos what's it doing? chewing the edge of new seal or leaking behind it??

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02-29-2000 16:39:53

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 Re: Re: Rear Seal on NAA in reply to Burrhead, 02-28-2000 20:28:31  
Its not chewed up, its leaking past. The seals
are installed with lip faceing the crank. At
idel it just pours out, rev. it up to about
1500 rpm it it stops leaking. Someone else
had overhauled this motor at one time. It had
rods cut.010 and mains .020. My only guess is
at one time the seal area was cut to. Got rope
seals today from Ford and rubber seal from
Felpro. Gona try felpro seal first. If it leaks
well I got back up. What do you think?

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03-03-2000 17:53:24

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 Re: Re: Re: Rear Seal on NAA in reply to Carlos, 02-29-2000 16:39:53  
I'd go for the rope. The rubber seals are wonderful if everything is ok. If everything is not perfect a rubber seal is not forgiving at all.

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