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Seal number for Sherman transmission

L

Lanexa Speedway

Member
I have my Sherman high/low combo transmission all apart right now. Got a rebuild kit and have all good parts now, with the exception of one seal. It is a seal that goes around the shift shaft.....the shaft that pokes out the side of the top cover.

Attached is a picture of the location from John Smith's web site and rebuild procedure. The shaft I'm talking about has the square end that the shift handle attaches to. However, the shaft/top cover on the one he's working on does not have a seal. Mine does. It's a 3rd generation unit per John's identification guide.

I pulled the seal out of mine before realizing that I didn't have one to stick in there, and there is no number to be found on the mangled mess that remains. I do know that the OD is 1", the shaft is 11/16", and the thickness of the seal is in the 0.156" range.....about 5/32" thick. Have been trying to find catalogs to poke through for a reference, but no luck yet.

Anyone know the part number for this rascal?

Thanks,
Kevin

mvphoto6104.jpg
 
The seal manufacturers (National, Timken, etc) have on-line catalogs where you can find a seal by using the dimensions you have specified. I could look it up for you but then you wouldn't learn anything.
 
Go to a Bearing Business and they will order the seal. Take the old seal or the numbers you have. May even have it in stock. We have Purvis Bearing Co. that I use.
 
Thanks. Understood. I have been looking in the catalogs, but haven't found it yet. Also, I don't have a number on the old part.....that would be too easy.

Just thought I'd post in case someone had it offhand...

Kevin
 

Thanks John.

I am officially blind as a bat!

(And by the way, I finally just found the seal in one of the catalogs.....6720)

Back in business...

Kevin
 
I too had trouble to find your seal. After looking
on the net I found a place called Clark seals that
had a couple seals with a .6875 x .999 x .1875
thick. I couldn't find the actual number for them,
but that size IS made. Hang in there, it's out there
somewhere. If I had the old seal books I had
available when I was working, I could give you a
number. I would go to an old auto parts house and
look in their books. Good luck.
 
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