Another Disc Brake Problem

Meatfox
Meatfox Posts: 155
edited May 2012 in MTB workshop & tech
There's probably loads of this on here, so apologies
Basically, constant bad rub on rear rotor/pads

Recently bled, which didnt make a difference. New pads fitted.
the particular rotor is true.
I've adjusted the caliper mounting washers and all that.
but the pistons dont ever seem to be far enough back for there to be a gap between the rotor and pads.

Any helpful fixes?
Cheers y'all

Comments

  • Chunkers1980
    Chunkers1980 Posts: 8,035
    Over filled?
  • nicklouse
    nicklouse Posts: 50,675
    brakes are?

    and yes a bleed will not fix anything unless the lever goes to the bar or is spongey.

    a bleed is normally one of the last things that should be done.

    as above over filled or poor set up or just not bedded in.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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  • YeehaaMcgee
    YeehaaMcgee Posts: 5,740
    Did you push the pistons back in fully when you fitted the new pads?
    My photos
  • steelie600
    steelie600 Posts: 519
    Have your replaced the return springs??
    Idiot ^^^^^^^^^

    Ralph
  • Plyphon
    Plyphon Posts: 433
    YeehaaMcgee wrote:
    Did you push the pistons back in fully when you fitted the new pads?

    Not to hijack this thread but when actually doing this do you have to push quite hard? I tried it on mine as a possible fix for an issue I had and I couldn't move them for toffee!
  • green room
    green room Posts: 51
    Plyphon wrote:
    do you have to push quite hard?

    Ooer! Yes you do have to push hard. Normally open end 10mm spanner or similar once the pads are out. Watch out if you've got the new SLX and up because the piston is ceramic and doesn't like metal levers being used to push back in. You can buy special tools for this which push the pads but don't damage them.

    http://www.parktool.com/product/hydraul ... press-pp-1
  • Chunkers1980
    Chunkers1980 Posts: 8,035
    Do it with pads in.
  • Meatfox
    Meatfox Posts: 155
    Yeh pistons were pushed right back before fitting new pads.

    Also now the new pads are in the lever doesnt move very much at all before engaging the pads to the rotor. was all good prior to the new pads. i understand theyll be thicker.

    Surely im missing something really simple...
  • cooldad
    cooldad Posts: 32,599
    Plyphon wrote:
    YeehaaMcgee wrote:
    Did you push the pistons back in fully when you fitted the new pads?

    Not to hijack this thread but when actually doing this do you have to push quite hard? I tried it on mine as a possible fix for an issue I had and I couldn't move them for toffee!
    Use a big screwdriver, leave the pads in, and turn it like a key.
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