trailer brake question

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trailer brake question

Postby Rob in NH » Sun Jul 24, 2011 8:57 am

hi guys, i'm checking my electric brakes and was wondering if you are supposed to put a thin layer of grease on the magnet?
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Re: trailer brake question

Postby Barnyard » Sun Jul 24, 2011 9:07 am

Rob, I just did some work on my trailer brakes just before I left for the Tug and while doing a little research I found this;

"Part of the surface of electric brake magnets, contains a friction material, similiar to the brake shoes.

Once they have absorbed oil or grease, they are done".


So I would say the answer to your question is not to put any grease on the magnets. The grease may keep your magnets from actuating when you need them.
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Re: trailer brake question

Postby Rob in NH » Sun Jul 24, 2011 9:44 am

thanks, i'm glad i asked.
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Re: trailer brake question

Postby jwl » Sun Jul 24, 2011 11:01 am

I work with brakes on big rigs and some smaller one all day. The worst part about getting grease or oil on the brakes is that it reduces the flash point of heat needed for the brake to catch on fire. A normal brake shouild stand almost 1000* before it burns, and oil or grease soaked one takes it down to 350*. You cant just clean them up in part cleaner either, as once it on the brakes it becomes part of them, and makes them worhtless in stoping power. Rust and oil/grease are the two biggest problems with el brakes, and as time goes on the magnets will get weeker due to the heat they go though as a natural part of braking.
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