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Old 04-08-06, 03:22 AM   #1
blue_neon
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Ok, i've stuffed up my hydruallic brakes...any help?

Well i just took the front wheel out to change the tyre and i put it back in and now the front disc is rubbing and the lever is WAAYY to 'tight'. Whats happened?

I also accidently squeezed the lever when the rotor was not in, but the pads returned to there normal position, but i think this has something to do with it....?

How do i get the brake to 'back off' a bit and stop rubbing? (yes its in correctly, i've mounted it about 5 times now.), also how do you back off the lever so its like it was when it came stock (not too tight?).

I'm going on an XC ride tommorow and i really would love to get this sorted out ASAP, the bike is rideable but its only about 3 - 4 days old so i'm not too impressed i've stuffed up the brakes!

(The brakes are Hayes HFX9 XC Hydraullic)

Any help MUCH welcomed
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Old 04-08-06, 06:42 AM   #2
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You need to pry the pads back with something. A big flat tipped screwdriver might do. Just be gentle hehe.
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Old 04-08-06, 06:44 AM   #3
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take wheel out, stick flathead screwdriver between pads, CARFULLY pry pads apart(untill they bottom out on the caliper body), put wheel in, loosen brake caliper mounting bolts, stick 2 buiness cards on either side of rotor, pull brake lever and hold, tighten caliper mounting bolts, release lever, take out buisness cards. Hopefully the caliper should be perfectly centered, if not fine tune it.
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Old 04-08-06, 11:46 AM   #4
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if vw's advice doesn't work, you may have to bleed the lines. Always put a shiv in when you take the wheels off, and don't squeeze the handle......
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Old 04-08-06, 12:28 PM   #5
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There's also a great section on this at Part Tools
http://www.parktool.com/repair/readhowto.asp?id=126
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Old 04-08-06, 12:33 PM   #6
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take off MC cap and "re-set" the pistons

sometimes a +/- vacuum is created and it needs to be destroyed!!!
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Old 04-08-06, 12:41 PM   #7
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Stop stuffing your brakes, you are bound to break them that way
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Old 04-08-06, 02:25 PM   #8
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Quote:
Originally Posted by apclassic9
Always put a shiv in when you take the wheels off,
I have never put a shiv of any kind between my pads when I remove my wheels.
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Old 04-08-06, 03:08 PM   #9
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Quote:
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I have never put a shiv of any kind between my pads when I remove my wheels.
neither do i
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Old 04-09-06, 08:23 AM   #10
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And I bet you're not silly enough to squeeze your brake levers while you have the wheels off.....
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Old 04-10-06, 02:53 AM   #11
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Thats what caused it all in the first place...silly me. The brakes are better now, the lever is loosining up and its not rubbing, should work out fine. But i still need to learn a bit more about these advanced so called Hydraullic brakes .
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Old 04-10-06, 05:46 AM   #12
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Quote:
Originally Posted by mx_599
take off MC cap and "re-set" the pistons

sometimes a +/- vacuum is created and it needs to be destroyed!!!

Whats an MC cap? How do i reset pistons? (sorry i'm am a new newbie to this)
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Old 04-10-06, 12:11 PM   #13
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Originally Posted by blue_neon
Whats an MC cap? How do i reset pistons? (sorry i'm am a new newbie to this)
master cylinder cap on the lever perch. make sure the "accordian" bladder is back to its neutral position if there is one on your model. while the cap is off get the pistons to where you want them.
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Old 04-12-06, 10:39 AM   #14
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push the pad back it with something.....
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