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Rear brake keeps sticking

I have a 87 harley davidson FLHTC and the rear caliper keeps dragging after about 7 miles of driving. I have already cleaned the caliper, that did not work. I rebuilt the caliper,and new pads, that did not work. Anyone know what would be next?

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  • Harley Davidson Master
  • 448 Answers

It's possible you have a piece of dirt or debris in the brake line or in the relief port of the master cylinder.

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

wayneman01
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SOURCE: New Pads new brake line cleaned and rebuilt caliper

It is one of two possible things:
There's corrosion in the caliper. Specifically in the groove that holds the piston seal. Take the seal out and scrape all signs of corrosion from the groove.
OR, the master cylinder has a gummed up check valve. Sometimes, you can take the master cylinder off, clean it out with hot soapy water (Simple Green works very well), blow it out with compressed air - and it'll be fine (without taking it apart). Otherwise, you'll need to get the rebuild kit and replace all of its internal moving parts.

Posted on Nov 17, 2009

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