gasket in oil bath fan pully

1946 BN IHC · Mar 6, 2014

I have the oil bath fan pully apart to check out and repaint. In side I find that all is in excellent shape for a tractor of 60 years plus. What confuses me is the obvious lack of a seal at the sahft end. To my way of thinking and mechanics a seal is needed to keep out contaminates and oil in along the shaft. I have searched for a felt seal with no success as of yet with out it the above would obviously take place.I cant see IHC making a pully on a shaft with out installing a seal in the housing to seperate the exterior from the interior.
Suggestions comments and dirctioin to locate such a seal piece.
Thank you .
Wm.

rustyfarmall · Mar 6, 2014

What is an oil bath fan pulley?

CNKS · Mar 6, 2014

If it has worked for 60 years, you don't have to worry about it. Be sure to read the operators manual as to how to add oil to it. After market replacements have sealed bearings with no lubrication. Doubt if they last 60 years.

glennster · Mar 6, 2014

my farmall b has one. the cooling fan housing has a resevoir in it that you add oil to for lubrication.

screwstick · Mar 6, 2014

Can't answer for other tractors, but the Cub fan pulley was shipped from the factory with an O-Ring at the rear of the fan reservoir on the shaft, but it was not intended to be replaced when it went bad. It was only for shipping purposes.

teddy52food · Mar 6, 2014

Why worry. It is still in good condition after 60 years.

Bob · Mar 7, 2014

What are you working with, perhaps an "A" a "B"?

NO shaft seal, for either the "Service Products" or the"Schwitzer-Cummins" fan hub.

(There ARE gaskets or a ring between the stack of parts that make them up, though.)

They used centrifugal force, as well as a spiral groove to "screw" the oil back inward. The oil level is BELOW the bore for the shaft so it doesn"t leak "at rest".

Do you know how to correctly fill and "check" the oil in them?

Parts breakdown:

http://partstore.caseih.com/us/parts-search.html#epc::mr59091ar229996

1946 BN IHC · Mar 7, 2014

I Thank all of you for you responces.
Yes that is probably what happens when in use the; oil is flung back into the housing from the open end of the shaft by the spiral groove in it. Still It makes the whole mechanism open to the ""environmental contaminates"" sharp dust, grit, etc. I guess just being extra careful with this rebuild. I didn't want to take chances with a good yet ""DELICATE"" almost iriplaceable piece of equipment. Just my carefulness / thats the way I am with all I do.
I still think I will see if I am able to develop a felt seal to keep the pully working for an other 60 years and beyond, by then parts will or may be absloutly extinkt.

Thank you again.
Wm.

Jim Becker · Mar 7, 2014

A tight seal at that location might cause an air lock, keeping oil from getting to the shaft.

gasket in oil bath fan pully

1946 BN IHC

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rustyfarmall

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CNKS

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glennster

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screwstick

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teddy52food

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Bob

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1946 BN IHC

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Jim Becker

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