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140 Diff. Bearing Retainer

Posted: Tue Jan 01, 2013 7:21 pm
by cubbrian
While putting new seals in the finals of a 140, I found that part of the flange was broken and only being held in place by one of the three bolts that hold the differential bearing retainer in place. I purchased a replacement, but it does not have a groove to install the o-ring on the retainer. My questions are: 1) will it hurt to leave the cracked retainer in place, and 2) can I use a retainer that does not have the groove for the o-ring?

Re: 140 Diff. Bearing Retainer

Posted: Tue Jan 01, 2013 7:29 pm
by Boss Hog
Sounds like a judgment call. If you were to use the replacement retainer I would use some sealant or you may have an oil leak.

Re: 140 Diff. Bearing Retainer

Posted: Wed Jan 02, 2013 7:33 am
by Gary Dotson
I certainly wouldn't re-use the broken retainer, those things carry a lot of load. I think you'll be fine with a little sealant on the replacement.

Re: 140 Diff. Bearing Retainer

Posted: Fri Jan 04, 2013 2:29 pm
by cubbrian
Could a machine shop cut a groove for the o-ring in the retainer I have and if so, what would that cost?

Re: 140 Diff. Bearing Retainer

Posted: Sat Jan 05, 2013 8:16 am
by Gary Dotson
I'm sure a decent machine shop could cut the o-ring groove, I've got no idea what they would charge, you'll just have to ask them. It should be a pretty simple lathe operation, though.

Re: 140 Diff. Bearing Retainer

Posted: Sat Jan 05, 2013 11:05 am
by Jim Becker
Does the groove really need to be there? Without the parts in hand, this is just a guess. If the o-ring is simply put on as far as it will go, will it still contact a machined surface of the case so it will seal? Will it interfere with contact/fitment of the retainer and shims? If it will seal and not interfere with assembly, just put it together.

Re: 140 Diff. Bearing Retainer

Posted: Sat Jan 05, 2013 12:22 pm
by Boss Hog
Jim , it is made just like a cub , but larger. I am sure you have seen one off a cub