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  • SQUEEEAAAAAKKK!!!!!!

     mr.b updated 3 years, 5 months ago 4 Members · 11 Posts
  • mr.b

    Member
    29 December 2016 at 10:34 am

    Went to go for a short ride this morning as it’s been far too long.

    To find a horrid squeak from my bike.

    I aborted my ride rather sharpish and returned home

    Located the noise to the front disc.

    Tried to realign the front wheel but it seems the calliper is slightly skew to be disc

    I have checked the disc a it’s pretty much as true as it could be being 5 years old

    Is it just a case of slackening off the calliper mount and adjusting it from there?

  • MPX309

    Member
    29 December 2016 at 11:48 am

    What brakes are they? Usually lighter plastic body calipers (like shimano), yes you can slacken the bolts. . . tie an elastic band around the brake lever and the handle to clamp it up tight, n slowly tighten them up again and you’re pretty much straight.

    I found with my Hopes (or possibly other big metal calipers) this doesn’t work so well, it was easier for me to face the bike against a light (or even just a window) so i could see through, tighten one side down ever so gently, and the other and keep going back and fourth slowly until it’s running with no rubbing.

    But are they squeaking or rubbing? if it’s squeaking it could just be some sort of oil or residue on the pads/rotor?

  • mr.b

    Member
    29 December 2016 at 12:09 pm

    Ones that came on the bike 😀

    Tekko maybe? Hydrolic ones anyway they look metal but to be fair I have really looked so I assume it’s metal

    Will there be any play in the mount as it looks like a tiny amount?

    Think it has be resting on something in the shed 🙄

  • mr.b

    Member
    29 December 2016 at 12:12 pm

    Defo a squeak, I ran with brake on for a bit to see if there was some suface contamination but it didn’t help

    Will have a look as the wife has guests this afternoon and in have to pretend to like them 😉

  • giantAstax

    Member
    29 December 2016 at 6:50 pm

    What brakes are they? Usually lighter plastic body calipers (like shimano), yes you can slacken the bolts. . . tie an elastic band around the brake lever and the handle to clamp it up tight, n slowly tighten them up again and you’re pretty much straight.

    This is not good practice. I did a mechanic course and the prescribed method is…..

    1. Remove the wheel

    2. Check the disk rotor isn’t bent or warped. Straighten or replace as necessary.

    3. Remove and check pads. Are they evenly worn on both sides. If not replace.

    4. Check pistons move in and out freely and evenly. If not use a brake cleaner and clean the pistons.

    5. Refit the wheel but not the pads

    6. Loosen the calliper mounting bolts so you can just move the calliper

    7. Visually align the calliper so that the gap either side of the rotor is identical. Most callipers can be aligned easily.

    8. Once correctly aligned carefully tighten the caliper bolts making sure the caliper doesn’t shift.

    9. Refit the pads. No more pad rubbing guaranteed

    As for brake squeal, there are loads of potential causes and unfortunately some pads just squeal even from new. You could try thoroughly cleaning the rotor, clean the pads, run the brakes very lightly, then progressively increase lever pressure and wheel speed and eventually do several emergency stops. This may sort your problem or may not.

    I have two bikes with identical setups and one squeals badly in the wet the other is fine. You may just have to live with it.

  • mr.b

    Member
    29 December 2016 at 10:32 pm

    Haven’t factored in the wet weather, it wasn’t raining but was damp/moist.

    The squeak didn’t start straight away but around 250m down the road.

    The calliper is slightly skew to the disc so will need to be sorted any how.

    Thanks for the walk through on alignment

  • KTM540

    Member
    30 December 2016 at 10:06 am

    What brakes are they? Usually lighter plastic body calipers (like shimano)

    “Plastic body calipers” …….. ??? 😯 😯

  • KTM540

    Member
    30 December 2016 at 10:10 am

    What brakes are they? Usually lighter plastic body calipers (like shimano), yes you can slacken the bolts. . . tie an elastic band around the brake lever and the handle to clamp it up tight, n slowly tighten them up again and you’re pretty much straight.

    This is not good practice. I did a mechanic course and the prescribed method is…..

    1. Remove the wheel

    2. Check the disk rotor isn’t bent or warped. Straighten or replace as necessary.

    3. Remove and check pads. Are they evenly worn on both sides. If not replace.

    4. Check pistons move in and out freely and evenly. If not use a brake cleaner and clean the pistons.

    5. Refit the wheel but not the pads

    6. Loosen the calliper mounting bolts so you can just move the calliper

    7. Visually align the calliper so that the gap either side of the rotor is identical. Most callipers can be aligned easily.

    8. Once correctly aligned carefully tighten the caliper bolts making sure the caliper doesn’t shift.

    9. Refit the pads. No more pad rubbing guaranteed

    As for brake squeal, there are loads of potential causes and unfortunately some pads just squeal even from new. You could try thoroughly cleaning the rotor, clean the pads, run the brakes very lightly, then progressively increase lever pressure and wheel speed and eventually do several emergency stops. This may sort your problem or may not.

    I have two bikes with identical setups and one squeals badly in the wet the other is fine. You may just have to live with it.

    This is the correct method and the only one that should be used in my opinion, tho as stated in #4, the pistons need to be moving at equal amounts, and at the same time .. if not, and you’re not confident in stripping the caliper, a LBS will sort it for a few quid 😉

  • MPX309

    Member
    30 December 2016 at 12:24 pm

    What brakes are they? Usually lighter plastic body calipers (like shimano)

    “Plastic body calipers” …….. ??? 😯 😯

    lol dont now, think i might been on drugs when i responded to this. sorry. lol

  • KTM540

    Member
    31 December 2016 at 10:42 am

    We’ll put that one down to seasonal mince pie poisoning aye .. 😆

  • mr.b

    Member
    21 January 2017 at 3:16 pm

    All sorted now, realigned the calliper took about 30mins as it moved as i tightened the bolts 🙄

    Quick test ride and some heavy braking and all is well 😀

    May try get out for a ride tomorrow

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