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641
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Replacing the Rear Main Seal

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Sam

09-24-1999 18:59:42




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I just purchased a 641 (built in 1959). Looks like the rear main seal is leaking enought that it need replaced asap. Looking for suggestions and helpful hints.

Sounds like I should be able to do it by droping the oil pan. So I need a pan gasket and the real main seal. Do I also have to remove the oil pump to get to it? If so assume that I will need a gasket for it as well, right?

OK now for the hard questions. What it the best seal to use rope or the pre-formed? I have a tool that I used to pull a rope seal on a old 292 so think that if the rope is the better choice I should be able to do it.

Also is you suggest the preform can you tell me how to determine which side to put toward the back?

Next question. Someone has told me that when the engines were built there were shim that went between the seal cap and the engine wall. Hope you know what I am talking about because i don't know how to describe it better. Anyway hear that these are not avaliable and that is a place that often leaks..... Any suggestion?

Hey... thanks in advance for the help.

P.S. just to addition questions. Is there any way to search on this forum? And, anyone know of a FORD TRACTOR CLUB in southeast Missouri.
it should be

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Sam

09-26-1999 05:37:00




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 Re: 641 - Replacing the Rear Main Seal in reply to Sam, 09-24-1999 18:59:42  

Thanks for the feed back guys.... Guess, that is what this forum is all about... Those "that have been there done that" helping those that have not "to get there and do that" without doing something really stupid.

Thanks



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RickH (IA)

09-25-1999 08:39:08




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 Re: 641 - Replacing the Rear Main Seal in reply to Sam, 09-24-1999 18:59:42  
To search the forum archives, scroll up to the top of the first page where the forum is described and click on the "search the archives" link.



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GEO

09-25-1999 07:23:03




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 Re: 641 - Replacing the Rear Main Seal in reply to Sam, 09-24-1999 18:59:42  
I would use the preform type seal (no tool needed) There shouldn't be any shims between the block and main bearing caps. The taper side to the back. If you can vision an oil seal split in two. The oil would be on the spring side.
GEO



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Luke

10-02-1999 21:20:48




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 Re: Re: 641 - Replacing the Rear Main Seal in reply to GEO, 09-25-1999 07:23:03  
GEO, I always seem to do better with the rope. Is there a reason to use the preformed? I'm not being a smart alec. I seriously would like to know.



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Jim

11-26-2000 18:50:11




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 Re: Re: Re: 641 - Replacing the Rear Main Seal in reply to Luke, 10-02-1999 21:20:48  
I have a 1997 F-350. Does anyone know have any idea why 4 left rear seals have blown since March 2000?



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Bern

09-24-1999 23:42:47




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 Re: 641 - Replacing the Rear Main Seal in reply to Sam, 09-24-1999 18:59:42  
How about southWEST Missouri? Springfield, to be exact. Try Oak's page at www.springfieldbiz.com/oaktree/fordtractor.html



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