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Harry Ferguson Tractors Discussion Forum
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Gaskets

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mm2007

04-23-2007 06:13:03




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This may sound like a naive question BUT.

When mounting gaskets such as those for the pto, trumpet housings, axles, etc.; should a gasket sealant like non-hardening Permatex be used or should they be mounted "dry"?

For remounting the axles I am concerend about the added thickness of the sealant if used bwtween the many layers.




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gshadel

04-23-2007 15:04:23




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 Re: Gaskets in reply to mm2007, 04-23-2007 06:13:03  
Usually...gasket = dry, no gasket = permatex.

Keep in mind if you use goop on the gaskets, you will have to scape it all off next time you tear into that piece, if you keep'er that long. I do use permatex with the oil pan gasket, only because I've heard so many horror stories of warped pans leaking, and I am not crazy about that rear bearing cap transition, with packing, that the pan gasket has to seal.
I also use permatex on the axle hub gasket, not the trumpet, just the hub, Thin coating between the backing plate, gasket, & hub, AFTER you have the shims figured out.. If you get a leak there, the oil is in your brakes.
I do use copper coat on the head gasket too. Guess that's my 3 exceptions to the gasket=dry rule.

I tore into my gov. housing once, the prev. mechanic used LOTS of blue permatex on it. There was ozzed-out permatex in all the bolt holes, studs, thrown all over the inside the gov. housing, from the crank assembly. A perfect example of why NOT to use permatex...use that stuff sparingly if you do use it!

Yup, grease does help hold gaskets in place real good too, thicker the better...

George

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John(UK)

04-23-2007 13:02:39




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 Re: Gaskets in reply to mm2007, 04-23-2007 06:13:03  
They are supposed to be fitted dry but you can use grease to hold them in place while you fit them together. Don't forget that you need to shim those axle hubs to Trumpet housings correctly.



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TexMac

04-23-2007 12:38:12




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 Re: Gaskets in reply to mm2007, 04-23-2007 06:13:03  
Only thing I stick down are head gaskets and oil pan gaskets. I use bearing grease to temporarily hold thin paper gaskets in place until I can get the bolts started, especially around the rear end where the gaskets often also have shims associated with them. Not a mechanic, but have been playing with old cars and tractors for over 40 years.



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Brian in Iowa

04-23-2007 06:43:41




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 Re: Gaskets in reply to mm2007, 04-23-2007 06:13:03  
Well what we do at are tractor repair shop is we buy the cans of spray on stack that attually is a Sealent and it keeps the gaskets on the metal to get the job together. Permatex makes the can, it comes in a can color of red,blue,orange. for the axle houseing and the pto i would use the red can for that and if u are woking on your motor or any other that has heat to it use the orange can. thanks brian.

P.S. They look like a paint can.

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