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Old 11-25-2012, 05:48 AM   #1
Rivet Master
2011 23' Flying Cloud
Durango , Colorado
Join Date: Oct 2010
Posts: 510
Exclamation Brake Failure - One Wheel. Cause????

I recently noticed a grinding sound from my trailer wheels, so I had my brakes inspected and serviced at my purchase dealer in ABQ. These are non-self adjusting brakes on our 2011 FC23FB. It had been just over 7000 mi since the last brake service by a local RV dealer in Durango. Inspection revealed that one of the brakes had been engaged without activation by the controller, or perhaps stuck engaged after activation. The pad was completely worn and the hub scored. My dealer replaced the entire assembly. The other three were fine with little wear. Cause? My dealer theorized about some foreign object. The controller tested ok. The tire, an original 14" Goodyear Marathon had worn to 3/32" tread depth, whereas the other three were at 7/32" after 15,400 miles. Apparently that brake had been dragging for some time.

Kudos to the GYM tire, as it had worn but not failed even when a good many of those brake dragging miles likely occurred during the extreme heat of the summer down along the Gulf Coast.

So how common is this? What might the cause have been? How might I have detected it sooner?

Safe Travels,
Joe & Joan Donnaway
Durango, CO
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Old 11-25-2012, 05:58 AM   #2

2003 25' Classic
Zanadude Nebula , Milky Way
Join Date: Jun 2007
Posts: 11,375
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"The pad was completely worn"

"pad".....were these disc brakes?

Reason I ask....

These "shoes" were Dexter replacements and had less that 6k on them when I noticed at Spring get-ready one wheel was dragging, the bonding had failed.
Dexter stood by the parts and reimbursed me cost plus tax.

Dexter thread.


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Old 11-25-2012, 11:48 PM   #3
Vintage Kin
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Fort Worth , Texas
Join Date: Nov 2006
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Electromagnetic drum brakes are neither particularly reliable nor effective. The minute they're serviced and one drives away . . suspect problems. Their only virtue is that they are cheap.

The "causes" tends to be a long list. Electrical first, then mechanical (assuming like-new spec to begin with).

Corrosion -- undetected -- is probably the worst offender on a TT a few years old.

See other threads around here on servicing and diagnosing.

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Old 11-26-2012, 06:09 AM   #4
Rivet Master
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
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If they are drums, one could have been mis-adjusted. Drums are also susceptible to poor return springs. or activating magnets that drag and cause premature failure. t is better to buy new loaded backing plates and get all new parts. If they are disks, I have seen poor alignment or lubrication on the cross pins causing drag after the hydraulic pressure was released.
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Old 11-26-2012, 05:03 PM   #5
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2011 34' Classic
Westchester Cty.NY , / Miami FL
Join Date: Jul 2007
Posts: 3,122
one thread on the forum mentioned the possibility of just the worn brake working and doing all the braking. add that to the diagnostic list :-)
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