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Old 08-12-2017, 11:10 AM   #1
Join Date: Jul 2017
Location: Adrian, Mi.
Posts: 68
Default Brake magnets ?

While crawling around under my new toy I noticed a broken wire behind the backing plate of one of the wheels. I know that it goes to a magnet on the inside and it needs to be replaced. I have never repaired electric brakes and have some drum brake experience.

Can I replace just one magnet or do they get replaced in pairs? Are they one size fits all? Are there junk parts or brands to avoid?

Please advise.

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Old 08-12-2017, 11:17 AM   #2
Join Date: May 2016
Location: Colorado
Posts: 70

Here's a video on magnet replacement.

They're not one size fits all, they go by hub diameter and axle weight rating.

Good luck.

Replace both magnets on same axle. Probably wise to replace all 4 if you have 2 axles.

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Old 08-12-2017, 02:46 PM   #3
Join Date: Jul 2017
Location: Adrian, Mi.
Posts: 68

Super video! Thanks, I can do that!
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Old 08-12-2017, 05:26 PM   #4
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Join Date: Jul 2010
Location: Pine, AZ
Posts: 2,355

Personally, I'd advise getting the complete assembly that includes new drums. This simplifies installation and they are not all that expensive. I get mine from E-Trailer.

- Jack
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew
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Old 08-15-2017, 07:50 AM   #5
Join Date: Jan 2016
Location: Colorado
Posts: 88

What Jack said.

Its almost easier to replace the hub than to repair - you have to disassemble down to the hub anyway, and replacement parts can easily have a new design thats ever so slightly different-just enough so it won't fit (mount bar is 1/16" wider, for example).

New hub is just four more bolts and two wire crimps (crimps you have to do with a repair anyway).

I once converted a surge brake trailer to electric for lower cost and less time than repairing the hydraulics. Thats how easy electrics are.
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