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 > Trailer Brakes HOT after adjustment

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Baja Man

Inland Empire, CA

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Posted: 10/10/22 07:06pm Link  |  Quote  |  Print  |  Notify Moderator

Hello all-

Recently completed a bearing pack, bearing seal replacement, and brake adjustment. I can't imaging the heat being caused by the bearing grease packing.

Hub adjustment:

Hubs were tightened, then loosened a little so that wheel spun freely and there was no play in hub when moved in/out.

Brake adjustment included:

Backed out shoes from adjustment port to where the brakes locked up. Then backed out about 5-7 clicks to where there was a mild scrape/sound feel.

I tested brakes by driving around under tow for approx. 5-10 miles braking hard and also using my Tekonsha brake lever to brake hard (not at the same time). I did hard braking doing 30-40mph. I did this to adjust my Tekonsha gain setting and to be sure brakes did not lock up on a hard stop.

After the drive, I pulled over near my home and went back to touch brake drums. They were very hot to the touch...all 4.

Can the slight drag from adjustment be the cause of the excessive heat?
Is it from the hard braking several times?

If drums are hot from not adjusted properly (tad too open), would the 5-10 miles of hard braking and hot drums have caused damage to anything?

Thanks!

* This post was edited 10/10/22 07:31pm by Baja Man *


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BB_TX

McKinney, Texas

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Posted: 10/10/22 07:21pm Link  |  Quote  |  Print  |  Notify Moderator

I always backed mine off until no drag or scrape sound at all and wheel spun freely.

* This post was edited 10/10/22 07:59pm by BB_TX *

Baja Man

Inland Empire, CA

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Posted: 10/10/22 08:32pm Link  |  Quote  |  Print  |  Notify Moderator

That was my first thought......I'll re-adjust with no rub and drive test it again

....wonder if any damage occurred?

bucky

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Posted: 10/11/22 03:57am Link  |  Quote  |  Print  |  Notify Moderator

After that hard braking it's not surprising that they were hot. No different than your car or truck after repeated hard braking.


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MFL

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Posted: 10/11/22 06:04am Link  |  Quote  |  Print  |  Notify Moderator

Baja Man wrote:

That was my first thought......I'll re-adjust with no rub and drive test it again

....wonder if any damage occurred?


I don't think any damage, and likely drums were hot from applying brakes repeatedly.

I normally can hear a slight drag after adjusting brakes. As to turns backed out, MINE usually amounts to 3-5 turns out, from a setting of hard to turn wheel, with one hand. Turns out can vary, one trailer to the next, but I go by how easily the tire/wheel spins, for correct adjustment. With a light spin of wheel, I like to see it rotate about one and a half turns before stopping.

With your wheel in the air, grab it at 3 o'clock and 9, try to make it wobble. A barely noticeable wiggle is good. Now give it a light spin, how many revolutions does it go before stopping on it's own? I like to see more than one turn, but more than 2 turns, means there is no drag.

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MitchF150

Puyallup, WA

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Posted: 10/11/22 09:01am Link  |  Quote  |  Print  |  Notify Moderator

Quote:

I tested brakes by driving around under tow for approx. 5-10 miles braking hard and also using my Tekonsha brake lever to brake hard (not at the same time). I did hard braking doing 30-40mph. I did this to adjust my Tekonsha gain setting and to be sure brakes did not lock up on a hard stop.

After the drive, I pulled over near my home and went back to touch brake drums. They were very hot to the touch...all 4.


I know if I did this with mine, they would all be hot?

If you drive around without hitting the brakes that much or hard on the trailer, how hot are then then?

Unless I missed something in your post?

Mitch


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klutchdust

Orange, California

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Posted: 10/11/22 10:31am Link  |  Quote  |  Print  |  Notify Moderator

[image]

I carry one in my tow vehicle. Check things when taking a break, stretching the new knee. It takes the guesswork out . What was your tow vehicle like?

Baja Man

Inland Empire, CA

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Posted: 10/11/22 11:31am Link  |  Quote  |  Print  |  Notify Moderator

I did not check temps with a temp gun.
Truck brakes work fine and trailer towed and stopped well.
I did not check temps under normal use (without hard braking).

Should wheel be turned and spin freely with NO brake shoe even barely touching?

I know brake adjustment may be by feel, but I want to be sure there is no brake dragging and/or premature shoe wearing. How can I adjust accordingly....just barely scraping or spin freely?

Krusty

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Posted: 10/11/22 12:43pm Link  |  Quote  |  Print  |  Notify Moderator

I always adjust mine to the point that I feel light drag. I think the heat you felt was just from the hard braking. If it makes you feel better, take it for another drive without the hard braking and recheck the temp


Krusty
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WayneAt63044

St. Louis, MO

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Posted: 10/11/22 12:48pm Link  |  Quote  |  Print  |  Notify Moderator

For a while I had some self-adjusting and some manual adjust brakes. The self-adjusting drums would measure 120 degrees while the manuals were around 90 degrees after a 2 hour run. I since have gone to all manual adjust brakes to keep the temperatures down. You really don't want to adjust them to rub a bit like the self-adjusting always do.

To test bearings & braking I would jack up one wheel at a time and check for just a very slight wobble in the bearing and then pull the emergency brake cable to engage the brakes. Then spin the wheel forward to determine how far it rotates with the magnet energized before the brakes apply. Never got over 1/2 turn before the brake shoes stopped rotation by hand.

No need to have things so tight you get unneeded friction and heat.


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