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Braking = Angry Bee Sounds

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  • August 14, 2020 at 10:29 am #31046
    0-0

    Can anyone help with this problem, please?

    Whenever I brake with the front brake, I always get the angry bee sounds.
    Bike: Canyon Endurace (2020).
    Brakes: Shimano 105 R7070 hydraulic.
    Pads: Shimano K03S Resin.

    I’ve cleaned the pads, brake housing and calipers, even flossing them with string.
    Plus bleeding them, removing all air bubbles, and pressing the calipers back out. And also forcing the pad spring further apart with screwdriver shaft.

    But after 2 rides the noise returns.
    The pads aren’t brand new, maybe half way through their lifecycle.
    They seem to be closing in simultaneously.

    Do you think I should take the brake housing apart, so I can properly clean the calipers?

    Thank you.

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  • August 17, 2020 at 6:11 pm #969097
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    0-0

    LOL, nice one
    LOL, nice one 🙂
    I never thought about heat resistant paint. Thanks.

    The bees have returned. But I’m still waiting for the new pads to arrive.
    So I’ll put up with them for now.

    August 17, 2020 at 5:51 pm #969095
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    Pilot Pete

    0-0 wrote:

    0-0 wrote:
    I’m now looking forward to trying out the new rotors. I thought I’d try Ali Express for once. 2 x 160mm approx £60 with PP https://www.aliexpress.com/item/32857520478.html A bit of masking tape and black spray paint and I’ll upgrade them to the Dura Ace version ;-)

    You won’t get me included for £60….

    The black does look good on Dura Ace, make sure you use heat resistant paint!

    PP

    August 16, 2020 at 10:02 pm #969093
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    0-0

    I’m now looking forward to
    I’m now looking forward to trying out the new rotors.

    I thought I’d try Ali Express for once. 2 x 160mm approx £60 with PP
    https://www.aliexpress.com/item/32857520478.html

    A bit of masking tape and black spray paint and I’ll upgrade them to the Dura Ace version 😉

    August 16, 2020 at 9:31 pm #969091
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    Pilot Pete

    Good news! I thought it was

    Good news! I thought it was probably rotor design coupled with pad wear….

    PP

    August 16, 2020 at 3:28 pm #969089
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    0-0

    Switching the rotors around
    Switching the rotors around has cured the buzzing sound… for now 🙂

    I’ll order some Shimano Ultegra RT800 – Ice Tech FREEZA Disc Rotors

    August 16, 2020 at 3:26 pm #969087
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    0-0

    Thank for the suggestion
    Thank for the suggestion 🙂

    August 16, 2020 at 10:38 am #969085
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    Podc

    Also check that the hose

    Also check that the hose connection to the caliper is tight – a very slight fluid leak will make the brakes squeal.

    August 16, 2020 at 9:44 am #969083
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    0-0

    I’ll try scratching them
    I’ll try scratching them first. As I’ve got some new replacements on order.
    Thank you for the help.

    August 16, 2020 at 9:42 am #969081
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    0-0

    Will do.
    Thank you.
    Will do.
    Thank you.

    August 16, 2020 at 6:17 am #969079
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    Rome73

    The pads may be clean but

    The pads may be clean but they may also be glazed. Replace them and see (hear) what happens. Or ‘scratch’ them.

    August 16, 2020 at 1:08 am #969077
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    Pilot Pete

    I’ve never greased the backs

    I’ve never greased the backs of disc pads other than using coppaslip grease on car brake pads many moons ago when I did my own car maintenance!

    I would try the other things first, before shelling out on grease as it probably won’t cure your problem (it can help with squealing brakes). As yours aren’t squealing I don’t think they are resonating. I’m pretty sure the pads are worn…if the other checks don’t sort it you could then try grease.

    PP

    August 15, 2020 at 5:37 pm #969075
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    0-0

    A question about the high
    A question about the high temperature grease.
    This might be a stupid question or genius, you decide 😉

    Instead of buying a tub of high temp grease and having basically a full tub after I’ve applied a dab to the back of the pads.
    Could I use thermal paste, which is used on the back of CPU chips in your PC?

    August 15, 2020 at 5:26 pm #969073
    0
    0-0

    I would have thought the end
    I would have thought the end cap was removable.
    But when I lightly gripped in a vice, it didn’t want to move, and I didn’t want to damage it by gripping it tighter.
    I’ve just ordered a new cassette tool which will fit over the cap.
    I will then swap the rotors around.

    I’ve also ordered some sintered pads too.

    Thank you very much for your help 🙂

    August 15, 2020 at 2:34 pm #969071
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    Pilot Pete

    And my final suggestion for

    And my final suggestion for the noise is worn pads. Fronts will wear out quicker than rears under proper braking technique, hence why you are getting it with the front brake only, and mine start to make a buzzing sort of sound when worn to limits (from memory 0.9mm of pad material remaining).

    I always have two sets of new pads hanging above my workbench ready to fit. It’s a 5min job and I’d certainly check and even swap your rears to the front to see if it cures the issue.

    PP

    August 15, 2020 at 2:28 pm #969069
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    Pilot Pete

    Depending on the rotor style,

    Depending on the rotor style, those with ‘big’ holes in can cause more noise under braking. I swapped to Dura Ace Freeza rotors on one bike and they don’t make any noise compared to the previous original rotors which had much bigger square shaped holes and made a sort of buzz noise under braking.

    PP

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