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  1. #1
    mtbr member
    Reputation: Magilla_Guerrilla's Avatar
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    What is the "master cylinder" in xx brakes?

    Sorry if this is a dumb question.

    The Aussie national distributor / repair venue for Avid, just sent back my 2010 xx brakes, stating that the "master cylinder" on the front brakes was not working and repair would be "uneconomical".

    Apart from WTF, can anyone explain what this might mean?

    I haven't had time to ring them, as I got this information late today (Friday), and they are now closed until Monday.

    I'm going to do some research, but not sure where to start.

    The breakdown:

    http://cdn.sram.com/cdn/farfuture/-V..._spc_rev_c.pdf

    The brakes are on pages 27/28. They don't mention a master cylinder. What would be the part they are talking about that needs fixing / replacing?

    The problem with the brakes was that the front brake would "shudder" slightly when you tried to use it. It still worked, but something wasn't right with it.

    Anyone got some info for me? Please

    Also, should I put this same post in the brakes forum, or will the right people see it in here?

  2. #2
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    The master cylinder is essentially the lever body on those brakes - the unnumbered part in those diagrams.

  3. #3
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    Reputation: MagicCarpet's Avatar
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    What made you conclude that the shuddering was in the lever somewhere? Was it very localised?

  4. #4
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    I wasn't sure where it was coming from. I would have guessed it was a brake pad. It was the specialist repairer that said it was a master cylinder issue.

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