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    Why are they leaking from there?

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    5 Comments

    1. Cru-Jones-33 on

      Usually that is from bleeding them by pushing a fluid up from the caliper. Shimano brakes are a 1 way bleed only and you risk damaging the bladder and clogging the ports if the oil is dirty if push up and not just gravity bleed.

      This will help 😉

       https://nsmb.com/articles/shimano-brake-bleed-and-bladder-repair/

    2. Grandmaster_Shu on

      I suspect there’s an issue with the reservoir – as seen in this video the only section behind there that fluid can come from is the reservoir 

      https://m.youtube.com/watch?v=BUuMJHuNYeA

      Shimano don’t sell replacement seals for that, so you may simply need to get a new lever. If yours is still under warranty, it may be covered.

      And yes, this has nothing to do with the direction you bleed in since Shimano’s own documentation states you push fluid from the caliper up towards the lever and bleed bucket.

    3. InevitableMission102 on

      I’m guessing ruptured diaphragm.

      https://preview.redd.it/jl6temf79d6d1.png?width=796&format=png&auto=webp&s=cfbe2a36b6f995deff7f853cc617d9586b690ab7

      Not sure what lever model that is, but the diaphragm is cheap like around 5€. If the leaver is cheap and you don’t want to try to fix it, just get a new one.

      Don’t know how your diaphragm got messed up(if that’s the case), but one way to potentially rupture it, is by pressing in the pistons with a closed bleed port at the lever.

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