Disc brakes problems!

[mtb_Josh]

Today during my ride, my rear caliper decided that it wasn't going to retract anymore and the pads locked onto the rotor... So we stopped and tried to force the pistons back with a little success but then it happened again a few km later. Eventually decided to stop pulling the back brake for the rest of the ride, but it STILL locked up... any ideas?

 

 

 

And no, the lever was not pulled while the wheel was off the bike.

 

The brakes are avid juicy carbons.

 

 

 

Please help me!

[ichnusa]

Pads probably worn... so pistons coming out more than they should to compensate for the wear. Try replacing the pads, even if they look like they still have some life left in them...

[mtb_Josh]

Hmm..that sounds like a decent solution. But if that is the case, then why couldn't I push the pistons back much?

[Procrates]

 

 

 

 

 

Is that small spring plate still in place? Otherwise the pistons could collapse on one another.

Procrates2010-02-02 13:00:26

[KingPigeon]

v brakes

 

 

[Procrates]

 

v brakes

Agreed, my avid speed dail ultimate levers paired to single digit ultimate brakes teach my juicy3's on the ss how to brake any day, even in wet!

[Little-Ben]

the o-rings on the internals sometimes swell up so it may need to be sent in to be checked out, thats just one thing i can think of

[mtb_Josh]

The spring plate is still there and I hate v brakes. I guess it could be the o-rings... Why would they swell up randomly?

[Little-Ben]

fluctuations in temperature i think

[Procrates]

 

 

 

 

Juicy's should only be bled with dot 4 or dot 5.1 ,if your shop used something else that is not easy on the rubbers this could be the problem.

[mtb_Josh]

fluctuations in temperature i think

 

 

 

Is that possible? If so I think you might have hit the nail on the head. My bike was on the rack for about 30min before the ride and it was very hot today.

[mtb_Josh]

 

 

 

 

 

 

Juicy's should only be bled with dot 4 or dot 5.1 ' date='if your shop used something else that is not easy on the rubbers this could be the problem.[/quote']

 

 

 

I bought the bike 2nd hand and I've done about 1000km on it and it hasn't ever been to the shop or bled at all. Could it take so long to mess the seals up?

[Little-Ben]

have a bike at the shop with this exact problem and its never ben bled,

 

mtb josh= yip, i have seen this happen to a few callipers before

[mtb_Josh]

Thanks Little-Ben, so do I need to replace the fluid or seals or anything? or do you think they will be fine?

[Little-Ben]

if im correct it will need to go to the avid agents to have the o-rings replaced

[Wyatt Earp]

Get the pistons out, clean everything and replace the piston O-rings, re-assemble and bleed, as simple as dat.