Thread: Brake spring?
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Old 05-19-2021, 05:50 PM   #32
JRTJH
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Quote:
Originally Posted by Weldon View Post
John,
Thank you. I pulled an old seal and then went to Orielly's and found matching seals and installed them, but I think I probably ended up with el-cheapo seals. Do you or someone else know an example of a "good" seal for my Dexter 3,500 lb axle? Here are pics of the ones I put on. I'd rather find out they are cheap and replace them when I do the brakes rather than when some "less than admirable" person pulls in front of me and slams on their brakes. Plus if I did install the wrong ones and you guys can help me get "good" seals, it may help someone else.
Weldon,

I could be wrong, but those seals look like a "single lip seal" not a "double lip seal" which is used on the EZ Lube axles. There is an excellent video on the e-trailer website that explains the seal and how it functions: https://www.etrailer.com/Trailer-Bea...kaAhL8EALw_wcB

What you have might be OK for a boat trailer, but I'd be concerned with it on an axle with brakes. From the photos you posted, I don't see the spring that keeps the seal in place and prevents it from folding over against itself... Maybe it's the angle of the photos, but I don't think those are the correct seals. They are the correct measurements but not "double lip seals"...

ADDED: Here are cross section diagrams of a single lip and a double lip seal. The single lip (bottom drawing) is rated at 3PSI and the double lip (top drawing) is rated at 7PSI. That extra "grease retention capability" (greater PSI) is vital at keeping your new brake shoes "clean and grease free"...

SECOND ADD: The Timken 442251 seal (number on the box in your photo) is a "single lip seal" Check the description specs: https://www.motionindustries.com/products/sku/01308230
and the SKF 17146 is also a "single lip seal": https://www.motionindustries.com/products/sku/01299847.
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