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Juicy 7 problem

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Old 03-25-07, 12:55 AM
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Kyle385
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Juicy 7 problem

Night before a race and I have a problem with my new Juicy Sevens! After squeezing the rear brake lever a couple of times, it will become slow to return to its resting position. What should I do?
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Old 03-25-07, 01:02 AM
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Sounds like an ajustment problem. Clearly, it's not the springs.... also
you might need to bleed the brakes.

I suggest reading the book on bike repair, on Amazon ....from Todd Downs
or another. It has a section on disk brakes, including hydraulic.
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Old 03-25-07, 01:36 AM
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Originally Posted by Kyle385
Night before a race and I have a problem with my new Juicy Sevens! After squeezing the rear brake lever a couple of times, it will become slow to return to its resting position. What should I do?
skip the race and eat Cheetos in your underwear all day... or I guess you could go to amazon and find the answer in 3-5 business days it takes the book to get there.

Kev apparently you have this book ..maybe look it up..
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Old 03-25-07, 01:41 AM
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Thanks for the quick replies, however I was trying to get by for the race, and the bleed kit won't be here until wed.
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Old 03-25-07, 02:46 AM
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DirtPedalerB-

There's 2 things you learn from the Downs' book:

1) you need a bleed kit that is specifically designed and manufactured for the specific brand
of hydraulic brake you have, as each company have their own spin on the parts and mechanics

2) you might destory the entire brake by using the wrong type, brand of fluid

So, make sure it's a factory bleed kit from the original maufacturer.

etc.
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Old 03-25-07, 07:31 AM
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http://forums.mtbr.com/showthread.ph...t=juicy+sticky
http://forums.mtbr.com/showthread.ph...t=juicy+sticky
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Old 03-25-07, 09:39 AM
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MattP. posted the right stuff. It's an easy fix, but you'll need a bleed kit. Or, just do the race and try to use less rear brake...

One of my sets was having sticky piston issues; bleeding and reseating the pistons is an easy fix. At worst, you'll need new square edge seals. Not something to be found super easily/quickly right before a race.

So go race, and worry about it later. I'm not sure what Kevmetric is talking about with springs; it's a piston seal/hydraulic problem.
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Old 03-25-07, 09:44 AM
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Originally Posted by scrublover
I'm not sure what Kevmetric is talking about with springs; it's a piston seal/hydraulic problem.
why couldn't it be a spring problem? do the 7's not have retractor springs?
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Old 03-25-07, 09:52 AM
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Originally Posted by mx_599
why couldn't it be a spring problem? do the 7's not have retractor springs?
There is one spring in the lever body; a piston spring. It's possible it's that, but highly unlikely. The sticky piston problem is well known and documented, and has a much easier fix vs. tearing apart the lever body to see if it's the spring there. The only spring in the Juicy setup, BTW.

The hydraulic fluid is mainly responsible for lever/piston return in the brakes, not a spring like you'd have in a mechanical system.
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Old 03-25-07, 10:20 AM
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Originally Posted by scrublover
There is one spring in the lever body; a piston spring. It's possible it's that, but highly unlikely. The sticky piston problem is well known and documented, and has a much easier fix vs. tearing apart the lever body to see if it's the spring there. The only spring in the Juicy setup, BTW.

The hydraulic fluid is mainly responsible for lever/piston return in the brakes, not a spring like you'd have in a mechanical system.
oh.

i thought it had the pad retractors like the 5's. i was thinking that maybe the OP could gently bend them a little more to give a bit more "spreading" power.
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Old 03-25-07, 10:26 AM
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Originally Posted by mx_599
oh.

i thought it had the pad retractors like the 5's. i was thinking that maybe the OP could gently bend them a little more to give a bit more "spreading" power.
they do have those, but they are very little responsible for piston/lever return; not enough that i'd consider them a spring for that purpose. they act more as a safety thing to help keep the pads in place, instead of the pins that some other companies use. and as a last ditch warning that your pads are too worn; if the spring ends start scraping on the rotors, you know you've let your pads get waaaaaay too worn...

first generation mechanical avid brakes actually used small magnets, and had no spring clips. you can actually run your brakes without them, but it is better with them in.
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Old 03-25-07, 10:38 AM
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oops, i read the original post wrong. sorry. i had it my head that the pads were rubbing. don't know why.
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Old 03-25-07, 12:53 PM
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Did the race and just used less rear brake, went fine, saw a tornado for the first time in my life! Just waiting on bleed kit shipment, thanks again for the help everyone!
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