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[Closed] Disk brakes stick while at work

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[#4258205]

I'm sure this shows my ignorance of how brakes work but anyhoo...

My rear Formula RX brake locks while I'm at work during the day. Its fine when I get off the bike, but when I go to cycle home again the rear brake has locked solid.

It's not with prior use, as this morning I didn't use the rear brake on purpose, and the thing is now locked solid.

Presumably it's a temperature issue potentially causing somethign or other to expand during the day? (and it is now quite hot)?

What do I do to go about fixing this? ๐Ÿ˜•
Cheers ๐Ÿ™‚


 
Posted : 14/08/2012 4:00 pm
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weird ! ๐Ÿ˜ฏ

regardless, try holding the brake levers "on" with a rubber band with bike upright while you work and see if they aoutobleed air out of the lines


 
Posted : 14/08/2012 4:03 pm
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How do you get it to work again?
Are you keeping it in an area where it gets quite warm? If so I suspect any air in the fluid is expending to the extent that the brake is forced on.
Have you bled it?


 
Posted : 14/08/2012 4:21 pm
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How do I get it working again? Last time I put the bike in the back of a work van and drove home lol... If it's locked on when I'm about to go to work I use a different bike..

I haven't bled it, so I'm guessing that's whats needed.

It's an intermittent problem that I've only now thought about the heat - as I hadn't used the brakes this morning and now they are on solid.

No free van and no bleed kit at work (or home for that matter) so I may be walking home ๐Ÿ™„


 
Posted : 14/08/2012 4:38 pm
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meant to add - All I'd done so far was piddle about with the allen key mounts tbh..


 
Posted : 14/08/2012 4:39 pm
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give the lever a few squeezes and then take the wheel out and use a flat blade to push the pads further apart.

if you can ride home without brakign this shoudl do the job ๐Ÿ˜‰


 
Posted : 14/08/2012 4:41 pm
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If that were my brakes I'd oik out the pistons, clean everything including the seals and then start again with fresh oil.


 
Posted : 14/08/2012 4:47 pm