Mountain Biking - Need hydraulic disc brakes guidance

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MK1988
02-11-07, 06:35 PM
Is there a site out there (other than parktool) that would teach me alot about hydraulic disc brakes. I took my front wheel off and was pumping my brakes slowely and then I realized the pads would not seperate. Now I cant get my front wheel on. :o My brakes are Juicy Seven. Thanks.

alumrock12
02-11-07, 06:53 PM
^noobie mistake... :-|

never compress the brakes on hydro's. since they're hydraulic, the oil that is forcing the pads together is now holding them together, i never found a website why, but i just know that when you compress them fully, they end up not comming back to home. i'm not really sure what to do but i know that once i partially pressed them on accident, but was still able to get the rotor in. so i slipped my rotor in, and then just pumped the pads a few times, that caused it to go back to normal.

either, there is a way you can stick a screwdriver or something in to the caliper body to contract the pads, or you're gonna have to buy new pads and put them on.
free_pizza
02-11-07, 06:58 PM
Did your brakes come stock on your bike, or did you buy them seperatly? If so, there should be a red tab that you stick inbetween the pads when you take the wheel off, it stops you from making that mistake!

You'll probably have to get a screwdriver and wiggle it to push the pads apart, although, you might need new pads after.,

MK1988
02-11-07, 07:05 PM
Thanks. I knew I should have read up on this stuff before I go messing around with something thats not already broke.
mx_599
02-11-07, 07:24 PM
flat screw driver. no reason to buy new pads.
MK1988
02-11-07, 07:52 PM
Yeah I got it open. Pads are fine.
free_pizza
02-11-07, 08:14 PM
no reason to buy new pads.
only if he doesnt mutilate them :)
sunnyd_72
02-14-07, 04:40 AM
I've never ran Avid brakes, so I don't know if it's a closed setup (un-bleedable) However on my Magura's this happend to me once, just take a small piece of would and push on the pads while opening the bleeder valve. Pop you wheel on, re-bleed, ride, rinse and, repeat.
mx_599
02-14-07, 06:42 AM
I've never ran Avid brakes, so I don't know if it's a closed setup (un-bleedable) However on my Magura's this happend to me once, just take a small piece of would and push on the pads while opening the bleeder valve. Pop you wheel on, re-bleed, ride, rinse and, repeat. got wood?

http://www.observedtrials.net/vb/images/smilie/momaru.gif
Hopper
02-15-07, 02:31 AM
Best way to get them undone is either, take the pads out totally and then use a screw driver to push the pistons back in. Or get a playing card and slip that inbetween the pads, then slip another one in etc.

To stop this problem i usually put a piece of cardboard inbetween the pads and then use an elastic band to clamp the lever. This holds the cardboard in place and stops the pads locking.