Juicy 3 rub

[mallize]

I'm running Juicy 3 breaks (I know... not the best). They are my first set of hydro, let alone disc brakes. I just got back into riding about 6 months ago.

My question is, do these breaks always rub? I've tried everything.

-Take pads out and gently push pads back with a flat head. This works for a while.

-Put two credit cards between the pads and rotor and squeezed hard a few times. This works for a little while.

-Squeeze five times really hard and put a rubber band on the lever over night. This works for a little while.

Are hydro breaks just knows for needing constant attention? Is it just the lower end Juicy's causing me headaches?

Thanks in advance.

[jbarber]

"Are hydro breaks just knows for needing constant attention? Is it just the lower end Juicy's causing me headaches?"

Some hydro brakes are prone to having sticky pistons. Which is what I believe you are having an issue with. Try this, but be careful not to contaminate the pads or rotor. Remove the wheel, remove the pads, use the flat head screw driver to push the pistons back into the caliper, then lightly (I mean lightly) squeeze the lever to get the pistons to come back out, now spray them with WD-40, both pistons. Then push them back into the caliper (this should lube the O-rings). Now squeeze the lever again, see if one of the piston is moving more than the other, if so push them both back in, hold the piston that is moving more freely in with the screw driver, and squeeze the lever, this will force hyd. fluid to the sticky piston and make it come out more. Spray it with WD-40 and push it back into the caliper. Now squeeze the lever again to see if they are both moving together. Continue working this process a few times until both pistons are moving freely and equally when the lever is squeezed.

Now clean up the caliper with paper towels, q-tips, towels, etc to remove the excess WD-40 so your pads and rotor's do not become contaminated. The Q-tip can also be helpful in getting dirt off of the piston and can aide in getting WD-40 around the piston when working them.

Be careful not to squeeze the lever to much with the pads out or you will push them too far out and you will get air into the system or squirt hyd. fluid out. Ask me how I know.......

Too further answer your question, you might assume that the Juicy 3's are more prone to this problem, but not necessarily, I have juicy 7's and go through this process about 3 times a year (front and rear).

If this doesn't help your problem, you can buy new O-rings / whole kit to rebuild the caliper. Or take to your LBS and have them bleed the brake, could be too much hyd. fluid in the system.

Good Luck

[mallize]

Sounds good. I'll give that a try. Thanks for the post.

[Requiem]

Hi Matt -

I have that issue all the time, but here's a thread that I got a lot of good advice on if it helps:

http://nationalmountainbike.com/boar...ead.php?t=8679

[baconrocket]

i would try re-aligning the caliper first.

[TNcaveman]

WD-40 is some weird stuff - I personally would not spray it into my calipers.

The alignment is probably off. Loosen the attachment bolts a little. Wiggle the caliper. Spin wheel and brake suddenly and relatively hard (firm). While holding the brake lever down, tighten the bolts.

And there is probably always some rub, just not supposed to be much.

Make sure your rotors are clean (alcohol and clean paper towels) and not bent/warped.

Steve

[ScraffyZ]

There's always the "have money & lazy" fix method to try..

Swissstop Disc Brake Silencer

would be curious to know if it works, since was suggested to me once. Now that the hub is tight (), don't need it tho..

Rick

[kindacreeky]

for freeing up stuck pistons. This is an adaptation of a Magura technique I read on some magura users group website. I have a small clamp that I use to hold one piston, while I push the other one out pretty far. Then the WD-40 seems to work the best for cleaning out the accumulated dirt. I tried Triflow but that did not work for me. I alternate clamping in each piston and then pushing other one out, and cleaning, then mashing in again. Sometimes this does not work, and has to be repeated, but seems to be the best remedy and I do it at least 2x per year on my Magura Martas. Once I get them clean and working good, if the rotors are not bent, they do not rub.

On Avid's, Caveman's suggestion for aligning is a good suggestion. That is not an option for other brands. But this technique for cleaning seems to work, most of the time.

[mallize]

This post seems to be necro'd. I eventually solved my issue by realigning the calipers. I have zero rub now and have not touched them in a month. I think getting all the components passed the 'break in' stage helped too.

Thanks for all of the replies.