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Old 09-22-2013, 07:32 PM   #1
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Electric trailer brakes are grabbing/locking in reverse

Just got home from a trip and went to back my trailer into the driveway and the brakes start to grab really hard almost to the point of locking up. This is the first time this has happened. Any suggestions?
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Old 09-22-2013, 07:50 PM   #2
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Does your truck have a factory built in trailer brake controller ?
Or if it is a regular dash mount, any chance the mount angle or any of the adjustments were changed.
Can you back up if you pull the trailer plug ? Only try this if your sure the truck can stop the trailer without the aid of trailer brakes.
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Old 09-22-2013, 07:54 PM   #3
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I have an after market prodigy controller. I will unplug it in the morning and try that.
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Old 09-23-2013, 08:24 AM   #4
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I got up this morning and unplugged the trailer from the truck and was able to back up fine. I plugged the trailer back in and pulled forward and then went to back up and all was fine until I tapped the brakes and it started grabbing again and wouldn't let go. I thinking of taking it to the dealer ship because electrical and drum breaks are not my strong points.
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Old 09-23-2013, 11:18 AM   #5
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I'm thinking that on the trip a wheel brg grease seal has started to leak and contaminated the brake linings. Could be only one wheel involved; but best to have everything checked.
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Old 09-23-2013, 11:34 AM   #6
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I tool it to the dealer about an hour ago. They are going to repack all the bearings and inspect/adjust the brakes.
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Old 09-23-2013, 12:14 PM   #7
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Quote:
Originally Posted by scottyJ98 View Post
I tool it to the dealer about an hour ago. They are going to repack all the bearings and inspect/adjust the brakes.
Make sure you test it on their lot when you pick it up. If you have problems , then they will probably want to test your trailer with another TV, if they haven't before you arrive.
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Old 09-23-2013, 12:38 PM   #8
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My trailer brakes began grabbing as I ascended a long hill but only when I turned on the 4 ways! Each time the brake/ts lights came on the brakes would grab. My controller has a calibrate feature and by doing just that, it eliminated the issue.

I calibrate every time now after hooking up.
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Old 09-23-2013, 07:14 PM   #9
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I always verify that what I was having serviced works before I leave the lot. I was bit in the @$$ once before.
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Old 09-24-2013, 09:31 PM   #10
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I heard from the dealer today and they said the linings on the brake shoes are bad and some wiring was also bad on the brakes. They want $900 to make those repairs and repack the bearing. What do you guys think about the work being done and the price? I think it is pretty steep.
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Old 09-25-2013, 10:32 AM   #11
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Did you get a break-down , parts & labor ?
I'd get on the phone and see if they have the trailer apart, so you can get over and see what they are talking about replacing.
If for example they are replacing , magnets , linings possibly a brake drum and the parts are say, $500, labor $400 + taxes , $900 although it may sound like a lot , might not be out of line.
Not sure what the shop labor rate is in your area , but brakes and brg pack should take about an hour per wheel.
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Old 09-25-2013, 07:37 PM   #12
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They were just replacing the shoes on each brake assembly and repacking the bearings. I located the complete assemblies online for $30 an assembly and have ordered them. The trailer is in my driveway awaiting the arrival of the parts. I just can't see paying that much for what was being done.
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Old 09-25-2013, 07:57 PM   #13
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My new unit 4 years ago did the very same thing. The hub inner seal was pushed in by greasing the hub improperly before at dealer.

The only problem I found was the brake drum faces and magnets were greased and the lining was dry. So every time I touched the brakes the lining grabed hard and wheels locked. The magnets grabed on the drum instead of sliding.

I cleaned everything with brake cleaner, reinstalled the hubs properly and I was on my way in 2 hours. No more problems since and 20k miles.
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Old 09-26-2013, 04:08 PM   #14
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Mine were shot, the trailer is 10 years old and other than adjusting them every year I have pretty much neglected them. I will from now on inspect and adjust them every year when I repack my bearings.
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