Aftermarket Axle Seal Retainer

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Dale Finch
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Aftermarket Axle Seal Retainer

Postby Dale Finch » Wed Mar 23, 2016 10:46 pm

I'm about to finish the rebuild/brake replacement of the right final on my '56 Cub, BOB. The Rear Axle Oil Seal with Retainer was badly damaged and the seal itself was falling apart. I think someone at some time tried to remove the retainer without using a bearing splitter to get the bearing off first.

In any case, I chose to replace the retainer with the new seal, available as a unit from TM Tractors:
http://www.tmtractor.com/new/fr/393fp.htm
Image

The installation went fine, but as I was reinstalling the axle with a new gasket, I remembered that there is an oil hole at the bottom of the casting (right side of the photo) where the seal sits:
20160318_170352 (Small).jpg

And here is a photo of another one I rebuilt:
P2017870.JPG


The old retainer had a "divot" in it to allow oil to pass through to lubricate (I think) the bearing. You can see it in the picture of the old retainer:
20160322_173906 (Small).jpg

20160322_173939 (Small).jpg

There were "divots" on each of 4 sides, so that there would be one over the hole no matter what direction the retainer was installed. (These were not the "stakes" that held the seal in. You can see one of those just above the "divot")

My question is, with no "divot" in the new retainer, will there be proper lubrication?

Bill E Bob
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Re: Aftermarket Axle Seal Retainer

Postby Bill E Bob » Thu Mar 24, 2016 12:12 am

Lubrication will come from the final via the back side of the bearing. The hole in the casting is for draining lube back into the final to prevent oil from pooling behind the seal. As for the divots, can't answer that part, however they should have no effect on bearing lubrication.

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Glen
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Re: Aftermarket Axle Seal Retainer

Postby Glen » Thu Mar 24, 2016 12:13 am

Hi,
It's hard to see for sure in your pics, try setting the 2 retainers side by side, looking at the inside of them. It looks like on the new one they have increased the bend in the metal where the divots are on the old one, so there would be no need for the divots. The bend looks like it is different than the old one. I'm not sure without being there. :)

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ricky racer
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Re: Aftermarket Axle Seal Retainer

Postby ricky racer » Thu Mar 24, 2016 6:46 am

Dale, I agree with Bill E Bob in the fact that the hole is a return hole for the lube to return back into the housing. That hole will keep oil from pooling behind the seal reducing its chance of leaking. Check the radius as Glen suggested. If the seal retainer does in fact cover the return hole, I'd suggest using a Dremal tool or small rat tail file and stretch the front of the hole up to the bearing race so the oil can drain back into the housing. Make sure any gasket is also notched in that location. Let us know what you find.
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Dale Finch
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Posts: 3039
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '55 Cub "Bertha"
'55 Cub "Ben"
'56 Cub "Boris"
'48 Super A "Bubba"
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Aftermarket Axle Seal Retainer

Postby Dale Finch » Thu Mar 24, 2016 7:41 am

The gasket IS still notched (all 4 sides so orientation is not a problem). You may be on the right track, Ben, in that the radius of the retainer allows fluid past the edge of the retainer...I will compare the 2 again.

And Bill E Bob, it DOES make more sense that the hole is a return/drain...gee, being on the bottom should have been a small clue, right?!!! :roll:


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