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Thread: attaching new brake hose to newly-rebuilt master cylinder '76 R90/6

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  1. #1
    Registered User ezwicky's Avatar
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    Oct 2012
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    attaching new brake hose to newly-rebuilt master cylinder '76 R90/6

    hey all,

    i just got my master cylinder back from apple hydraulics and i'm going to put everything back together tomorrow. i already rebuilt the caliper myself and i bought a new upper brake hose and grommets.

    one question i have first off: is there anything i need to know about reconnecting the brake hose to the master cylinder? any thread prep, like anti-seize or conversely, thread-lock?

    thanks in advance,

    -eric
    BMWMOA #182796

    '76 R90/6

  2. #2
    Registered User dmftoy1's Avatar
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    attaching new brake hose to newly-rebuilt master cylinder '76 R90/6

    Pretty sure you want to use NOTHING

  3. #3
    Registered User ezwicky's Avatar
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    Quote Originally Posted by Dmftoy1 View Post
    Pretty sure you want to use NOTHING
    i thought so. clymer's did not mention anything, but i wanted to ask in this forum because sometimes people have little tricks that the manuals don't mention.

    thanks,

    -eric
    BMWMOA #182796

    '76 R90/6

  4. #4
    #4869 DennisDarrow's Avatar
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    I just completed the exact route you are describing with the M/C rebuild and new brake lines. Usually, with hydraulic lines no sealer, coating, or tape is used on the threads. The orifices in a hydraulic system are so very small and exact, to take the chance of something like a loose piece of crud is kinda not called for.
    The only hint I can give is to connect the brake line to the M/C first and then to the brake itself. Not doing so requires one to remove the M/C and revolve it to tighten up the fitting.........Such a difference all of this rebuild does. I didn't notice over the years how my front end had quit diving deeply and that great hmmmmmmmmm that the rotor makes.....God bless........Dennis

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