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Old 03-17-2015, 09:07 PM   #1
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Question Disc brakes locked on new axles

I just completed replacing my running gear, axles, springs, brakes, etc. on my 5th. I installed new Dexter 7k axles with disc brakes, replacing a 6k Lippert system. The new wheel hubs rotated freely prior bleeding the brakes. At this point the right rear disc brake is totally locked tight and the remaining three seem to drag some. I had bleed all four brake hoses prior to attaching them to the calipers to remove any material in the lines. Then I attached the brake hoses and bleed them again, starting at the right rear and moving towards the shortest distanced wheel from the pump. After that the right rear is locked tight. How do I release the brakes. I "assume" that the same will apply to the other three that are dragging some. Thanks for any help.
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Old 03-17-2015, 09:17 PM   #2
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Disk brakes always drag some AFAIK.
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Old 03-17-2015, 09:18 PM   #3
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I think a slight bit of drag is normal. I don't know why one is locked. Sounds like a stuck or faulty caliper, however.
I did a 7k Kodiak disc conversion to our 2011 Cameo. I got everything from Bill Halasyn at www.stopyourtrailer.com He is very knowledgeable in both Dexter and Kodiak brakes and great to deal with. I'd suggest you give him a call. Good luck, Phillip
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Old 03-17-2015, 09:20 PM   #4
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This is not just dragging, the hub will not rotate at all. The other three hubs do not rotate like they did before I bleed the system.
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Old 03-17-2015, 09:27 PM   #5
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If you used a drum brake master cylinder you need to remove the check valve, behind the fitting

Good luck
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Old 03-17-2015, 09:36 PM   #6
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Quote:
Originally Posted by twinboat View Post
If you used a drum brake master cylinder you need to remove the check valve, behind the fitting

Good luck
Bingo !
Had to do that on a boat trailer I converted to disc's.
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Old 03-17-2015, 09:37 PM   #7
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I installed a new Dexter EoH 1600 psi actuator for the disc brakes.
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Old 03-18-2015, 12:34 AM   #8
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Does it make any difference if you disconnect the power leads from the new hydraulic pump? I'm just thinking out loud and wondering if there is some sort of residual power on either the power or ground side of the pump thus supplying some hydraulic pressure to the calipers.
Just a thought and wild a$$ guess. I'm interested in the solution as I have this disc brake system on my Titanium.
Cheers Rick T
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Old 03-18-2015, 05:27 AM   #9
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Did you use any fittings from the old master cylinder, on the new one? The check valve, could be in the first fitting , to the brake line.

Just thinking out loud
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Old 03-18-2015, 11:42 AM   #10
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Thanks for the idea. But no, the ONLY components from the old running gear are my wheels and tires. Otherwise EVERY thing from the frame down is 100% new. I had drum brakes on the old axles and now the brakes are Dexter EoH Disc. I have a good flow of brake fluid through the bleeder fitting on this hub and the air appears to be out of the system at all four hubs.
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Old 03-18-2015, 02:16 PM   #11
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Call dexter to ask about check valves.
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Old 03-18-2015, 07:56 PM   #12
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In the end I just removed the calipers from the rotor. Turns out some sand had got in and locked it up tight. Just cleaned everything good and reassembled, works great now.
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