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Old 07-17-2006, 10:41 AM   #21
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Electric brake adjusting

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Originally Posted by Zeppelinium
I don't know why I didn't think of this. The brake is backed off way more than I ever would a set of automobile shoes. It could explain a lot. I'll do this for sure, but it will be a couple of weeks before I get to it. Thanks.
Adjustin trailer electric brakes, cannot be compared to car or light truck brake adjustments.

The following is a good way, even for the DIY to properly adjust the electric brakes.

1. The key is how to turn the tire assembly. As you tighten the star adjuster, "turn the tire assembly by holding the tire with A THUMB AND ONE FINGER ONLY". Then continue to tighten the adjuster until you cannot pull the tire through.

2. Then back off the adjuster 5 to 6 notches. Turn the tire again. If you hear a scraping noise from the shoes, that changes as you pull the tire assembly through, then most likely the drum is "out of round".

3. Each notch represents about 1000 miles of wear.

4. In some cases, you can back off the adjuster 1 or 2 more notches, but that change must be done on all the wheels.

5. Contrary to opinion, RV brake drums can and do become out of round, especially for those owners who may travel in the mountains.

5. With today's "unicast" hub and drums, they are very unlikely to be out of round when new, unless they have been hit or dropped. In that case, a machine shop can easily true them back to being round.

6. Electric brakes should be adjusted every 5000 miles. A "major" brake should be done, every 10,000 miles or once a year, which ever comes first.

Andy
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Old 08-09-2006, 08:52 AM   #22
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Brake Assemblies are L & R

Just a comment that may help someone replacing their axle and removing everything down to a bare axle. DIY folks sometimes find out the hard way that brake assemblies are designed for left and right operation. When you have removed the entire assembly (drums and backing plates w/brake shoes) it is very easy to get them switched and remounted backwards. Dexter brake assemblies have L & R stamped in the backing plate to ensure proper installation. If you cannot find any markings, remember that what is referred to as the "short" shoe always faces to the front.
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Old 08-09-2006, 09:31 AM   #23
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Originally Posted by empresley
Just a comment that may help someone replacing their axle and removing everything down to a bare axle. DIY folks sometimes find out the hard way that brake assemblies are designed for left and right operation. When you have removed the entire assembly (drums and backing plates w/brake shoes) it is very easy to get them switched and remounted backwards. Dexter brake assemblies have L & R stamped in the backing plate to ensure proper installation. If you cannot find any markings, remember that what is referred to as the "short" shoe always faces to the front.

Some backing plates (brake assemblys) do not have any markings.

The way to determine left from right, is that the "magnet arm", must always be facing the front of the trailer.

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Old 08-09-2006, 10:28 AM   #24
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Quote:
Originally Posted by Inland RV Center, In
Some backing plates (brake assemblys) do not have any markings.
The way to determine left from right, is that the "magnet arm", must always be facing the front of the trailer.
Andy
Good point. When comparing different assemblies it would be easier to remember that the lever arm should be in front of the hub or axle.
Thanks for reminding me.
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