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Thread: Trimming housing on M8100 brakes

  1. #1
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    Default Trimming housing on M8100 brakes

    So, the new XT's are coming with the lever containing fluid and the caliper empty with the hose attached but the end that goes into the lever has what looks like for the whole world like a catheter end, soft rubber, and an installed barb and no olive aka "One Way Bleeding"

    What's going on here WRT trimming the housing ???

    Seems like there is a pressed-in bronze olive substitute?

    YT and as far as I can find Shimano has no videos up yet as it's 2020 stuff

    Anyone go to a recent tech clinic?

    - Garro.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

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    Default Re: Trimming housing on M8100 brakes

    Same stuff that’s been in use since 2014. The black rounded cover on the hose pulls off, there is a bh90 barb in there. The yellow plug on the lever pulls out, there is a bh90 olive behind it. There is a small barb inside that lever that punctures the thin film that’s covering the bh90 barb on the hose, push the hose in straight, tighten the compression nut.

    Usually the hose is way too long and you have to cut a foot or so off, just press a new bh90 barb in at that point and the lever will be ready.

    It’s called J-Kit if you want to look into it. It was designed as a way for oems to get pre bled brake systems that they could route internally, but what it’s turned into is one more thing for the builder of the bike to mess with as the oems have just passed that labor along to us.
     

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    Default Re: Trimming housing on M8100 brakes

    Thanks !!!

    New to me as I've always got OEM as a fully bled unit and just trimmed and ran it no sweat.

    Bleeding brakes in a chair sucks !!


    - Garro.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

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    Default Re: Trimming housing on M8100 brakes

    Make sure you use the titanium (grey) barb on bh90 housing, and not the brass one from bh59
     

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    Default Re: Trimming housing on M8100 brakes

    Quote Originally Posted by steve garro View Post
    Thanks !!!

    New to me as I've always got OEM as a fully bled unit and just trimmed and ran it no sweat.

    Bleeding brakes in a chair sucks !!


    - Garro.
    Make a "bleeding jig" out of two riser bars.
    I use a pair of old Brompton "M" bars, clamped in the vice rotated 90º (so that the "rising" part is horizontal, and the "flat" part stays vertical and facing down).
    9113.jpg
    The brake lever goes at the top, clamped in the "rising" part of the bars (on those is still 22.2mm so fits well); while the caliper goes at the bottom in the "flat" part of the bars which has been drilled for PM, FM and IS calipers, two bolts and the caliper is secure.

    Can post a picture on monday.
    Andrea "Gattonero" Cattolico, head mechanic @Condor Cycles London


    "Caron, non ti crucciare:
    vuolsi coś colà dove si puote
    cị che si vuole, e più non dimandare"

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    Default Re: Trimming housing on M8100 brakes

    Damn, that's a solid idea !!!

    - Garro.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

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    Default Re: Trimming housing on M8100 brakes

    Actually, I do have two (bad) pictures of the rig
    Attached Images Attached Images
    Andrea "Gattonero" Cattolico, head mechanic @Condor Cycles London


    "Caron, non ti crucciare:
    vuolsi coś colà dove si puote
    cị che si vuole, e più non dimandare"

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