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Old 05-19-2016, 11:12 PM   #43
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1991 25' Excella
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Brakes should always be replaced as pairs. If not they wont brake evenly and cause one side to work harder then the other. You also need to measure the drum as they should be the exact same size aka new one is smaller internally than a worn out drum and well brake harder. Also look for glazing and micro fractures in the drums.
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Old 05-20-2016, 07:53 AM   #44
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Not really suggesting this, as it's easy to spend other people's money, but if it were me, I'd be thinking about upgrading to disk brakes about now.

Mike
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Old 05-20-2016, 10:04 PM   #45
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Like I said, I don't give up

Swapped the passenger side front shoes (new assembly) with the passenger side rear shoes.

Heat seems to have followed the shoes. Not quite as drastic as the new hub new baking plate assembly. But I could smell the brakes from the rear wheel now. I did not drive quite as long either so maybe that has something to do with it.

Will test drive a few more times and see what happens.
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Old 05-22-2016, 06:32 PM   #46
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2 more drives so far. Heat has followed the shoes. Put an infrared thermometer today and the outer hub at outer bearing was about 20 degree hotter and the outer drum was 110 to 147. Even got the drum to about 250 with hard breaking on the dexter shoes. Whereas the Napa shoes where around 178 at that point.
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Old 05-25-2016, 09:55 PM   #47
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Replaced the dexter shoe with a new napa UP-4002 which are the shoes on the rear axle. Same test drive as all the other times. No heat issues.

The new dexter brake assembly and drum with napa shoe was a few degrees hotter at the tire temp and the drum was 300F when I parked it as compared to 260 on the old drum. But no brake smell other than a slight smell from the new shoe.

On the highway the tires all ran within a few degrees of each other. Temps off highway had a 4 degree difference at the highest temps.

Will wait for a few more runs before I call this solved.

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A little of what I have learned about trailer brake shoes:

Napa has 2 kits that fit 12x2 up-4002 (will fit 6k or 7K) and up-4005 (7K maybe) no local napa could tell me what the actual brake material was rated for and the info was not on the box.

Dexter has 2 part numbers for shoes one is 6K and other is 7K

Tekonsha has a 5000-DX (?K) and a 5010 which is labeled as 7K

Redline has a will fit 6k and 7k

The backing plate assembly I replaced last summer was labeled 7K
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Old 05-26-2016, 02:52 AM   #48
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1991 25' Excella
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Once again replace brakes in pairs
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Old 05-26-2016, 08:21 AM   #49
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2004 28' Safari S/O
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"Place the brakes in pairs"

My local Airstream dealer replace one shoe with a Tekonsha 5000-DX. When I asked shouldn't I do at least the axle on both sides the response was "no, the other side looks like new"

I think a more accurate statement is match the same braking material. I suspect if I put new Dexter assemblies on both sides the front axle would have generated more heat than the rear axle. Maybe not enough to raise alarm.
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Old 05-26-2016, 08:53 AM   #50
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On the 23D, we replaced all four sets of brake shoes at the same time from the same vendor. They were later replaced with the upgrade to auto-adjust backing plates on all four wheels.
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