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Old 05-21-2015, 09:49 PM   #1
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Do These Brake Magnets Need Replacement?

I'm prepping for an upcoming trip and did a brake check. I've got plenty of pad left, but the magnets don't have all four wear points. Do these need replacement yet?

Thanks.
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Old 05-21-2015, 10:36 PM   #2
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For as little as they cost, I would change them out.

I would say they are marginal. They will work, but it might not be long till they come apart.
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Old 05-22-2015, 09:12 AM   #3
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Replace
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Old 05-22-2015, 10:17 AM   #4
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When in doubt............
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Old 05-22-2015, 11:27 AM   #5
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You need to replace or resurface the drum as well. If you are not going to have the magnet face of the drum resurfaced, then you need to leave the old magnets in there. Otherwise the surface won't be flat and the two won't match. It is all or nothing. They don't look that bad to me.

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Old 05-22-2015, 11:33 AM   #6
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You need to replace or resurface the drum as well. If you are not going to have the magnet face of the drum resurfaced, then you need to leave the old magnets in there. Otherwise the surface won't be flat and the two won't match. It is all or nothing. They don't look that bad to me.

Perry
I was waiting to see if I was the only one.....I think they're fine. Nice even wear surface and look to me to have about 50% life left in them.
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Old 05-22-2015, 11:58 AM   #7
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Thanks everybody. I was thinking that I'd just do everything at once (backplate assembly, drum) and was hoping I had a little life left in what I had. I've definitely seen worse.
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Old 05-22-2015, 11:58 AM   #8
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To the OP... When you replace "contact surface parts"(mating surface), in this case, the magnet question.... That would of course indicate replacement / resurfacing of the drum surfaces.

It is hard to see how the magnet (and drum surface it contacts) are wearing. To me, it looks like one edge is wearing significantly faster and possibly "curved".. And if the magnet is replaced, there might not be "full contact" of magnet and drum surface in this case.

So, if a long trip is planned, might be best to "button up" and ride. Take the replacement to a time you are not rushed and do it right....

P.S.-- the above recommendations are based upon my own experience that if I don't fix it soon, I regret it soon. Standard Operating Procedure for me. My apology if f I misled.
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Old 05-22-2015, 12:43 PM   #9
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You can buy the complete backing plate complete with new brake shoes and magnet for 58$, the magnet is about 35$....
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Old 05-22-2015, 01:33 PM   #10
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The best solution is to go with disk brakes but I would have to buy new rims for that to work. The old Airstream alloy rims won't fit. The caliper gets in the way.

Perry
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Old 05-22-2015, 01:43 PM   #11
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The best solution is to go with disk brakes but I would have to buy new rims for that to work. The old Airstream alloy rims won't fit. The caliper gets in the way.

Perry
Disc brakes are not the panacea they are made out to be. There's the electric to hydraulic conversion that takes place in the actuator that is troublesome. First they fail, and even when working properly, there is some delay. Wish I had electric myself.
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Old 05-22-2015, 03:21 PM   #12
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Same old story, KISS , keep it stupidly simple....
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Old 05-22-2015, 07:50 PM   #13
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Ive seen worse that still worked. Just not on my trailers. As long as the grooves worn in by the magnets aren't really deep you can get by with a magnet replacement only. They wont last quite as long, but will work safely.
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Old 05-23-2015, 11:06 PM   #14
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Ive seen worse that still worked. Just not on my trailers. As long as the grooves worn in by the magnets aren't really deep you can get by with a magnet replacement only. They wont last quite as long, but will work safely.

Bingo.
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