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Disc Brakes - BR-RS785 Having issues installing new pads

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  • 26-05-2020 8:14pm
    #1
    godtabh
    Moderators, Science, Health & Environment Moderators Posts: 23,218 Mod ✭✭✭✭


    Got new pads for my disc brakes today.

    Old pads were J04C metal. Was given L03A as replacements.

    Installed them but cant get rotor to fit in. Pistons have been push back (havent pushed to hard) but when I check compatibility of the L03a the BR-RS785 arent listed.

    Any ideas?
    Post edited by CramCycle on


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    #2
    jamesd
    Registered Users Posts: 3,438 ✭✭✭jamesd


    godtabh wrote: »
    Got new pads for my disc brakes today.

    Old pads were J04C metal. Was given L03A as replacements.

    Installed them but cant get rotor to fit in. Pistons have been push back (havent pushed to hard) but when I check compatibility of the L03a the BR-RS785 arent listed.

    Any ideas?

    If you take the pads out and look at the pistons are they out or well in?


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    #3
    godtabh
    Moderators, Science, Health & Environment Moderators Posts: 23,218 Mod ✭✭✭✭godtabh


    jamesd wrote: »
    If you take the pads out and look at the pistons are they out or well in?

    I not sure as I've never done it before but having tried something flat and solid it seemed to work. New pads are installed and wheel is spinning freely (and stopping!)


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    #4
    Pa ElGrande
    Registered Users Posts: 3,603 ✭✭✭Pa ElGrande


    https://www.youtube.com/watch?v=gQ_oIAPuQR8


    sticky pistons - 2 mins 40 seconds in.



    https://www.youtube.com/watch?v=yXUE8qqTmI4


    2nd may be worth a review

    Net Zero means we are paying for the destruction of our economy and society in pursuit of an unachievable and pointless policy.



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    #5
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 49,580 CMod ✭✭✭✭magicbastarder


    godtabh wrote: »
    Old pads were J04C metal. Was given L03A as replacements.
    the 'fan' at the top seems slightly different between these two?


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    #6
    Tony04
    Registered Users Posts: 646 ✭✭✭Tony04


    Is the issue disc brake rub?


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    #7
    jamesd
    Registered Users Posts: 3,438 ✭✭✭jamesd


    godtabh wrote: »
    I not sure as I've never done it before but having tried something flat and solid it seemed to work. New pads are installed and wheel is spinning freely (and stopping!)

    Ya I've ways had to give the pistons a push in, park tools do a nice little tool for doing it. Any disc rub when the wheel is spinning?


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    #8
    godtabh
    Moderators, Science, Health & Environment Moderators Posts: 23,218 Mod ✭✭✭✭godtabh


    jamesd wrote: »
    Ya I've ways had to give the pistons a push in, park tools do a nice little tool for doing it. Any disc rub when the wheel is spinning?

    At the start yes but took the while off and gave the pistons another push. Seemed to take a few goes at pushing them in.

    Did 40km on them there and seemed fine.


This discussion has been closed.
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