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Trailer surge brakes - Tandem axle

Old 03-27-2020, 05:49 AM
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Default Trailer surge brakes - Tandem axle

I have new coupler and disc assemblies.
(Had drum prior and the issue existed then too)

I seem to be heating up the bearings on the brake hubs

ive never had the issue before this new truck
Iím thinking the surge isnít able to fully disengage when Iím driving in stop and go traffic.

is it possible I may have to raise the hitch ball an inch or two to allow the system to function properly? Currently it appears very close to level when hooked up.
Old 03-27-2020, 06:45 AM
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my bet it is the stop and go traffic, make sure that your surge system moves back and forth. it should pull out rather easily. have someone watch as you pull forward and back up etc.
Old 03-27-2020, 08:07 AM
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How hot are they?
Old 03-27-2020, 12:59 PM
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Edit- Reread your post.
Old 03-27-2020, 01:23 PM
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Originally Posted by Pez Vela View Post
How hot are they?
enough to heat up the grease and it boil out


I bet itís just a bit bound.

It does not slide quite as easily as it should.

Iíll raise the ball and work from there

thanks!
Old 03-27-2020, 02:27 PM
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It shoulld slide back and forth easily. Are you Level when hooked up?
Old 03-27-2020, 02:59 PM
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Make sure the actuator you installed is made specifically for disc brakes. Surge actuators are made for disc or drum and if you use a drum actuator on disc brakes it will do what you are experiencing. The drum actuator keeps a small amount of residual pressure on the brakes at all times, a disc actuator does not.

DISCANDDRUMDIFFERENCES.pdf
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Old 03-29-2020, 09:46 AM
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Originally Posted by leonreno View Post
Make sure the actuator you installed is made specifically for disc brakes. Surge actuators are made for disc or drum and if you use a drum actuator on disc brakes it will do what you are experiencing. The drum actuator keeps a small amount of residual pressure on the brakes at all times, a disc actuator does not.

Attachment 1112315
Yes make sure you have disc brake actuator
Old 03-29-2020, 11:50 AM
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Check to be sure the break away cable has not been puled and the brakes are not dragging .If so you must press the release under the coupler to release the brakes.
Old 03-30-2020, 08:43 AM
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If you have a new actuator, disks and calipers, jack the wheel up with the actuator fully disengaged and turn the wheel. If there is a lot of resistance take the wheel off and open the piston on the caliper and make sure it opens somewhat easy, if it doesn't they are dragging. If it does verify the slider moves freely, you should be able to move the caliper back and forth with no problem with the piston fully open. Also verify your lines are okay and fluid flows freely.
Old 03-30-2020, 11:51 AM
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And finally, after ruling out everything else, check the castle nut to see if it is too tight.
Old 03-31-2020, 05:29 AM
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Originally Posted by TNBuras View Post
Check to be sure the break away cable has not been puled and the brakes are not dragging .If so you must press the release under the coupler to release the brakes.
First check this.
The master cylinder in the tongue might be hanging up. My brakes were not releasing and had to replace it.

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