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Hey,
I just got some new pads for the front of my avid juicy brakes, but could not move one of the pistons back. I tried with a screw driver but it wouldn't budge. I thought it might be stuck so I pulled the brake lever a bit to check. It moved, but it also moved the other piston in and that won't move back now.
Do I need to bleed the whole system to fix it? If so how do I do it? I can follow instructions on how to bleed, but can't find any telling you at what point you can move the pistons back to their proper positions. It just assumes the pistons are perfect. The brakes are juicy 3 so they don't have the the adjustment thing, which would be really handy right now!
Any help would be great.
Cheers
Check the piston isn't squint and apply slow pressure with a big screw driver. If all else fails you ought to be able to attach the bleed syringe and force the pistons back forcing the oil into that. But it shouldn't come to that really.
I had this on a pair of Juicy 3s when the kids 'helped' me clean the bike.
To fix it I put a small-ish flathead between the pads to get them apart a wee bit then kept upping the width of the screwdriver until I could fit the rotor back in. It rubbed like hell on the rotor at that point so I tied up the brake levers (after pumping them 10-20 times) and left them overnight.
Worked a treat as they seemed to automagically reset themselves to clear the rotor by a couple of mil.
hey, fixed it. the piston was a bit on the piss. I managed to lever it back in with the old pads and some tyre leavers. A bit of oil came out though when I did this. Is that cos it was on the piss? Just put new pads in so don't want em to start leaking on the pads.
Any thoughts why a bit of oil was released?
Ta
you prolly compromised the seal. it 'might' be ok now the piston is straight again but it could be worth topping up the oil.
the break is perfect. The loss of oil is probably good in the sense that the brakes were bled about half way through the old pads life so there was probably too much oil anyway.
Been squeezing the break a good few times, but there doesn't seem to be any oil coming out.
I guess it will become obvious if the seal has gone cos the break will go down to the bar.
Is it easy to get a new seal put in there?
Seal replacement will need a full stripdown of the caliper, air pressure to blow the piston out, smear of silicone grease for re-assembly(best to do both pistons) and a full bleed. Oh, and not sure if seals are available separately, think you have to buy a piston kit(and if you have to order one, it's listed as a "pressure foot kit", not at all confusing eh?)