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Old 07-21-2015, 02:11 AM   #1
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Severe Brake Pulse

We are two thirds of the way through a three month trip and yesterday developed a real severe trailer brake pulse at low speed on our Wildcat T28RKS. It's only noticeable at low speed ( coming to a stop) but really rocks the trailer . I'm in Dawson City in the Yukon so limited services. We just completed 700 miles of gravel road travel so wondering if that hasanything to do with it. I can't tell if it is an in-
Hub mechanical problem or an electric problem, although everything else electrically seems fine.
Would appreciate some input before I star pulling wheels.
Thank you
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Old 07-21-2015, 06:40 AM   #2
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Just a thought your brake controller adjustment didn't accidentally get changed?



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Old 07-21-2015, 06:45 AM   #3
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We are two thirds of the way through a three month trip and yesterday developed a real severe trailer brake pulse at low speed on our Wildcat T28RKS. It's only noticeable at low speed ( coming to a stop) but really rocks the trailer . I'm in Dawson City in the Yukon so limited services. We just completed 700 miles of gravel road travel so wondering if that hasanything to do with it. I can't tell if it is an in-
Hub mechanical problem or an electric problem, although everything else electrically seems fine.
Would appreciate some input before I star pulling wheels.
Thank you
I'm sure others will jump in but it could be several things; grease on the linings, out of round drum, magnets going bad, or brake controller. Probably will need to do process of elimination. I would jack each wheel up and rotate to see if you feel any drag-release-drag type feeling (good way to determine out-of-round drum). Pull each wheel and check for grease on linings and any other issues. go to etailer.com, some good brake troubleshooting data on that site. Gets into how to check magnets etc. It takes a little time but you'll eventually nail it down.
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Old 07-23-2015, 03:10 PM   #4
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Originally Posted by Oaklevel View Post
Just a thought your brake controller adjustment didn't accidentally get changed?



Probably the quickest and easiest thing to check. This happened to me last week when I noticed the same thing that Filterman is describing and the front drivers side wheel would lock up. Turns out the power adjustment was somehow turned up all the way. No idea how that happened but once I backed it off, problem solved.
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Old 07-24-2015, 03:56 PM   #5
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just serviced a self adjusting brake. if one of these over-tightens, you could get a warped drum and a pulse. I get it figured out before you venture on...
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Old 08-09-2015, 09:07 AM   #6
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Be responsible and pull the drums and inspect. I would bet you'll find a grease on lining issue.

Also, just a suggestion to buy an inexpensive IR thermometer to carry in the tow vehicle and when you make stops, walk around and point it at the drums / hubs / tires on the tow vehicle and trailer.

We caught a dragging / stuck left front caliper on our truck once (and it wasn't pulling to the left either) and a incorrectly adjusted brake on the RV (on the way home from buying it).

$25 and a bit of diligence will save you a LOT of grief on day.
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