Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Seized front calliper.  (Read 3624 times)

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  • Offline Iain

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    Offline Iain

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    Seized front calliper.
    on: Feb 27, 2016, 12.58 pm
    Feb 27, 2016, 12.58 pm
    Can I unseize one of my front callipers without removing it completely?
    Honda VFR 2002
    Sprint ST 2007
    Sprint ST 2009
    Sprint GT 2011
    Trophy SE 2013

  • Offline Coconut   gb

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    Re: Seized front calliper.
    Reply #1 on: Feb 27, 2016, 01.10 pm
    Feb 27, 2016, 01.10 pm
    What has actually seized ?

    Is it one or more of the caliper pistons - there are four pistons in each of the two front calipers,
    or is it that the wheel won't turn after being laid up for winter ? ...
    in which case it might be that one or more of the pads has "stuck" to the disc ?

    Exploded parts drawings here : World of Triumph



    Last Edit: Feb 27, 2016, 01.14 pm by Coconut

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    Re: Seized front calliper.
    Reply #2 on: Feb 27, 2016, 01.43 pm
    Feb 27, 2016, 01.43 pm
    Two of the pistons in one of the callipers has seized. I've got the Caliper off now and when pumping the brakes the pistons don't move.

    Just reading back over my old Haynes Sprint manual it says not to try and remove the piston with pliers. It says the calliper should be replaced with a new one.
    Honda VFR 2002
    Sprint ST 2007
    Sprint ST 2009
    Sprint GT 2011
    Trophy SE 2013

  • Offline Coconut   gb

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    Re: Seized front calliper.
    Reply #3 on: Feb 27, 2016, 02.45 pm
    Feb 27, 2016, 02.45 pm
    Using pliers or grips on the pistons is not recommended
    as you are likely to cause damage to the piston surface, rendering it unusable.

    If you've removed the caliper from the mounting but have left the brake hose attached,
    try using Clamps / Bars to prevent the "good" pistons from moving,
    which will then divert more pressure to the struck piston(s)
    and hopefully get them moving again when you operate the brake lever.

    Once they are moving it's a case of carefully expellng them, cleaning them up,
    examining and replacing pistons / seals as necessary, of course being very careful
    not to get ANY brake fluid onto ANY painted surfaces !

    One complete new Caliper will cost over 450 !
    A new Piston and Seal set will be around 58 per Caliper.







  • Offline Iain

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    Re: Seized front calliper.
    Reply #4 on: Feb 27, 2016, 04.41 pm
    Feb 27, 2016, 04.41 pm
    Thanks Coconut, Does the piston & seal set have to be Triumph specific?
    Honda VFR 2002
    Sprint ST 2007
    Sprint ST 2009
    Sprint GT 2011
    Trophy SE 2013

  • Offline Coconut   gb

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    Re: Seized front calliper.
    Reply #5 on: Feb 27, 2016, 05.14 pm
    Feb 27, 2016, 05.14 pm
    I don't know the answer to that one  :431:

    The Calipers are "Nissin" brand as far as I'm aware.

    Caliper rebuild kits are available for the rear brake caliper from other suppliers,
    such as Wemoto.com but they don't list kits for the front.

    Might be worth a Phone call to them though ? .... 01273 597072

    Cheers  :821:


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    Re: Seized front calliper.
    Reply #6 on: Feb 27, 2016, 06.06 pm
    Feb 27, 2016, 06.06 pm
    If my tortured (single malt) old memory capacity is still functioning correctly,  :087: I think that I faintly remember  :112: that the Trophy front brake caliper parts are same as the post 2006 Yamaha FJR1300 brake parts
    Parts for the rear caliper are very common on many Triumph models such as Sprint ST 1050, Explorer and even the 865 Bonneville.


    Last Edit: Feb 27, 2016, 06.21 pm by Mustangpilot
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    Re: Seized front calliper.
    Reply #7 on: Feb 28, 2016, 01.48 pm
    Feb 28, 2016, 01.48 pm
    Got it sorted, thanks all.
    Honda VFR 2002
    Sprint ST 2007
    Sprint ST 2009
    Sprint GT 2011
    Trophy SE 2013

     



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