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Old 08-20-2015, 08:22 AM   #1
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Brake Magnets

Hey all, wonder if any of you had this happen to you, I just recently checked the bearings/brakes on my 2012 Sabre 5th wheel for the first time mainly because my break controller was giving errors of current overload on the trailer brakes. When I took the first drum off I discovered the issue and that was there was no retaining clip on the brake magnet and it was constantly rubbing on the drum and the magnet was in bad shape and one wire was broken. After repairing the issue on the first wheel I did the 3 other wheels and guess what the retaining clip was missing on those as well, there were signs of some ware on the magnets but not bad enough to replace at this time. I called a couple of trailer/RV shops to get replacement clips and they were in some ways saying that the clips are not really necessary but from my point of view the clip keeps the brake magnet just off the brake drum not to wear it down during travel, before taking each brake drum off I would spin the wheel and could hear the rubbing of the brake magnet on the drum, after putting new clips on and doing a bearing service and adjusting the brakes all was good. Thought I would share what I found.
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Old 08-20-2015, 08:35 AM   #2
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I thought that the magnets were supposed to lightly ride on the drum.
The magnets have a wear surface for that very purpose.
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Old 08-20-2015, 08:47 AM   #3
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Quote:
Originally Posted by Herk7769 View Post
I thought that the magnets were supposed to lightly ride on the drum.
The magnets have a wear surface for that very purpose.
I agree.

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Old 08-20-2015, 08:57 AM   #4
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The paragraph that you wrote may have the key explanation in it.

Quote:
my break controller was giving errors of current overload on the trailer brakes
Look at why your controller is sending a electrical charge to the brakes that is engaging the magnets to the drums.
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Old 08-20-2015, 09:03 AM   #5
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I noticed that as well.

"the magnet was in bad shape and one wire was broken."

The broken wire could have been touching a metal component.
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Old 08-20-2015, 09:10 AM   #6
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Quote:
Originally Posted by Brother Les View Post
Look at why your controller is sending a electrical charge to the brakes that is engaging the magnets to the drums.
He said he found (and apparently fixed) a badly worn magnet and broken wire.

On a similar trac--- last fall I went thru brakes and bearings on my Rockwood Ultralite. I found medium wear on shoes and magnets but nothing far enough
to need replacement. I did some price checking just in case and found that if
I'd needed shoes and magnets I could buy a complete new brake assembly with back plate (minus drum) for about the same or even slightly less than shoes and magnets separately. If I'd needed them I would have gone with
complete assembly from either Ebay power seller or e-trailer.com

(Put on brand new Maxxis tires- new bearings - painted and computer balanced the wheels then took DW to RV show and traded it in!!! ARGH!!)
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Old 08-20-2015, 09:29 AM   #7
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Clips are for (Factory Assembly Assist) as per (Dexter Shop Supervisor) who repaired (Our Brakes) at the Goshen Frog Rally! Youroo!!
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Old 08-20-2015, 09:31 AM   #8
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Clips are for (Factory Assembly Assist) as per (Dexter Shop Supervisor) who repaired (Our Brakes) at the Goshen Frog Rally! Youroo!!
Apparently the clips just keep the magnets in place while the drum is not in place!!
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Old 08-20-2015, 09:38 AM   #9
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Apparently the clips just keep the magnets in place while the drum is not in place!!
Correct! Youroo!!
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Old 08-20-2015, 09:43 AM   #10
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Quote:
Originally Posted by KyDan View Post
(Put on brand new Maxxis tires- new bearings - painted and computer balanced the wheels then took DW to RV show and traded it in!!! ARGH!!)


What makes me chuckle is that I worry about the same thing.. with doing all of this wheel and suspension work.
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