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Open Roads Forum  >  Towing

 > Dexter Nev-R-Adjust hub out-of-round

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Timeking

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Posted: 01/07/20 08:49am Link  |  Quote  |  Print  |  Notify Moderator

I read the long and very informative post from 2010 about the need for the hubs when using these self-adjusting brakes to be within 0.015 specification. When I hit the brakes it seems like there is a pulsing going on like one of my hubs is not exactly OK. Since I travel 1,000s of miles per year, would like to make sure all is as it should be.

I googled all about to see about measuring and perhaps turning my drums to spec, but all the info shows drums off of autos ... which don't have bearing races in them. Can a shop that turns auto drums, also turn drums from a TT? Answers I've got so far from calling range from "what is turning" to "sure".

How can I be sure that pursuing this won't damage the races in their lathe?

MFL

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Posted: 01/07/20 03:31pm Link  |  Quote  |  Print  |  Notify Moderator

Have you or anyone actually removed the hubs to check the brakes? A pulsing brake is more common with a rotor being bent, rather than an out of round drum. I suppose, if out of round enough, could pulse, but may be best to just replace the drum, if that is the actual problem. OTOH, could be a wiring short, causing intermittent operation.

Jerry





K Charles

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Posted: 01/07/20 03:43pm Link  |  Quote  |  Print  |  Notify Moderator

Anyone that can turn a drum can turn your drum, where the brakes ride. The part where the magnet rides is a different story, not everyone will, or can do that part.





Timeking

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Posted: 01/07/20 03:45pm Link  |  Quote  |  Print  |  Notify Moderator

I remove the hubs, repack and check the brakes annually.

If you look at the 2010 post (see below), you will see that the WORRY is that a sufficiently out-of-round hub will make the self-adjuster over-adjust, heat up, and likely fail one way or another. That would suck coming down a mountain in the middle of nowhere.

https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/23458294/srt/pa/pging/1/page/1.cfm

deltabravo

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Posted: 01/07/20 06:30pm Link  |  Quote  |  Print  |  Notify Moderator

I'm switching to Nev-R-Adjust brakes...... sounds like I should have the drums turned or just replace them all.

I'm replacing the brakes because I have one wheel the keeps locking up, even after adjusting the brakes multiple times this summer. (brakes / beargings were inspected / repacked in July)


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edbehnke

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Posted: 01/08/20 07:06am Link  |  Quote  |  Print  |  Notify Moderator

just replace the whole hub on the wheels. pretty straight forward, not worth it to turn and replace the brake pads.


while at it have the bearings greased, they should be anyway annually at least


eddie and sandie
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Timeking

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Posted: 01/08/20 09:24am Link  |  Quote  |  Print  |  Notify Moderator

Even new hubs can be out of spec, out of round, from being dropped or stored on their sides rather than flat. Further, if you replace the hub, you do not need to replace the brake shoes, only sand them a bit. Further further, if a hub is slightly out of round, it will wear unevenly and progress to more out-of-round as the miles mount up.

So..... When I get time (my wife's Mom died last night) I'm going to go to a few machine shops and see what they say in person, then I'll post whatever back to this site.

fj12ryder

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Posted: 01/08/20 11:50am Link  |  Quote  |  Print  |  Notify Moderator

Why would a machine shop, whose business is machining hubs, tell you they wouldn't need turning? Seems unlikely they would turn away business.


Howard and Peggy

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Timeking

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Posted: 01/08/20 12:38pm Link  |  Quote  |  Print  |  Notify Moderator

OK so what should I do?

ScottG

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Posted: 01/08/20 12:41pm Link  |  Quote  |  Print  |  Notify Moderator

If just the drums are out of round, get them turned. No need to replace everything unless the brakes shoes and magnets are worn.
Turned drums will probably be better than new ones.

My last TT had Alko axles and the drums were out of round from the factory. I lived with it and the poor braking that came with it. New TT has same size brakes (self adj) but drums are fine. Although the new TT weighs a ton more, it stops better.


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