Sticking brake piston

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Sticking brake piston

Postby keefa » Thu Jul 17, 2003 7:03 pm

:-? FG hydraulics not releasing enough on one rear wheel, causing a small amount of binding (not much but anoying !!)
If I wiggle the disk a little against the brake pad and therefore piston, it frees up. Have let the piston out until I just see the first o ring and lubed it and have also totaly removed the piston, cleaned it, new rings and re bled the brakes but still a wee bit sticky. Cant see any thing in the liner that would cause it to stick. The other side is fine, as are the fronts.
Any fixes please ?
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Postby Ruffles » Thu Jul 17, 2003 9:57 pm

I had the same problem on my front brakes. I took the piston out and polished the inside of the caliper with a dremel until I had a mirror shine. After reassembly, it's working fine.
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Postby keefa » Thu Jul 17, 2003 10:41 pm

Thanks for that, Means a re-bleed though I guess :o
arse !
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Postby Ruffles » Thu Jul 17, 2003 10:45 pm

Yup, sorry about that. I've lost count of how many times I've bled mine. I've finally got them working though. Once you get them set up, you'll love them.
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Re: sticking brake piston

Postby LMCALDERON » Fri May 22, 2015 5:22 pm

Ruffles wrote:I had the same problem on my front brakes. I took the piston out and polished the inside of the caliper with a dremel until I had a mirror shine. After reassembly, it's working fine.


Hello Mate! Thanks a lot!, ill have the same problem, then i did just like you said with the dremel! and VOILA! It work better than new, and since are one in the front now the disc runs freely, even better than the other one!
Im amazed, now i will polish the other 3, thank you very very much!
Cheers!
Luis M.
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Re: Sticking brake piston

Postby gardey » Fri Aug 28, 2015 2:03 am

A little bit of rubber grease on the o rings too will stop the problem recurring.
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