Electric brakes/wheels

Submitted: Monday, Apr 24, 2006 at 07:50
ThreadID: 33181 Views:1583 Replies:4 FollowUps:4
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I have just had electric brakes fitted to my off road CT. as I seem to be regularly towing over 750kg. The brakes work fine, but when I jack up the wheels and spin them,(obviously with the brakes off!) it appears the drums rub against something (I think the backing plate) at some points in the revolution. The local mechanic isn't concerned about it, but it troubles me. I understand the tolerances need to be fine to keep material out of the drums, but am worried (maybe unecesarrily) about overheating and subsequent loss of braking power, or at worst damage to the mechanism. We're about to head up to corner country and beyond so want everything in top condition.
I can't find any reference to this problem on previous posts.
Has anyone had any expeerience similar to this? Any help wouild be appreciated.

Craig.
(the squire)
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Reply By: Rosco - Qld - Monday, Apr 24, 2006 at 07:59

Monday, Apr 24, 2006 at 07:59
Craig

I'd suggest what you'e most likely hearing is the electro-magnet rubbing against the vertical face of the drum. What this consists of is a steel ring filled with brake drum compound. The steel becomes the magnet and the brake material friction activates the cam which in turn applies the brakes.

It's not uncommon for this to rub against the drum and is not to be concerned about. Hope this helps, don't worry and enjoy your trip.

Cheers
AnswerID: 168681

Follow Up By: Rosco - Qld - Monday, Apr 24, 2006 at 08:30

Monday, Apr 24, 2006 at 08:30
"What this consists of is a steel ring filled with brake drum compound"

.... What this consists of is a steel ring filled with brake PAD compound

oops .. sorry
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FollowupID: 424051

Follow Up By: Member - Craig M (VIC) - Monday, Apr 24, 2006 at 09:20

Monday, Apr 24, 2006 at 09:20
Rosco - many thanks. Craig.
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FollowupID: 424054

Reply By: Ray Bates - Monday, Apr 24, 2006 at 08:55

Monday, Apr 24, 2006 at 08:55
Hi Craig. Don't worry about the noise we all get it. As the previous writer stated it is the magnets rubbing on the drum and it is possibly caused by residual magnetism.
AnswerID: 168687

Follow Up By: Member - Craig M (VIC) - Monday, Apr 24, 2006 at 09:21

Monday, Apr 24, 2006 at 09:21
Hi Ray - Again, thanks.
Craig.
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Reply By: Member - Charlie M (SA) - Monday, Apr 24, 2006 at 18:55

Monday, Apr 24, 2006 at 18:55
Its the magnets, they have a light anti rattle/ chatter spring behind the magnet to hold against the drum face.
Cheers
Charlie
AnswerID: 168746

Reply By: Member - Vincent A M (NSW) - Tuesday, Apr 25, 2006 at 09:09

Tuesday, Apr 25, 2006 at 09:09
Most of the time its the magnets but take the drums of & have alook for any rubb wear marks Once i thought it was the magnets but it was the brake pad wearing through the drum (Cape york to Syd)
AnswerID: 168850

Follow Up By: Member - Craig M (VIC) - Wednesday, Apr 26, 2006 at 10:47

Wednesday, Apr 26, 2006 at 10:47
Thanks Charlie and Vincent. Vincent, I have pulled the drums off and they look ok, but I'll do it again after a week or so, and see what's happening.
Craig.
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FollowupID: 424393

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