Adr!@n Posted August 24, 2021 Share So, I've got 4 Shimano levers, of which 2 have bad pistons. I suspect somewhere along the line, one of the levers was filled with DOT fluid, so that piston is a no go. The other 3 are OK, but 2 of them have been working hard for about 6 years and I think the seals around the piston are not doing their job anymore. So quick question, is this seal something that I could get at a place that sells seals? I've never seen another seal that resembles this, except for other bicycle brakes. Then next question; I can't be the only one who has extra Shimano levers that have gone sticky, so if there are more people like me who need internals maybe we could order a bunch of these pistons and repair the levers we have. Would anyone be keen? https://www.aliexpress.com/item/1005002814805287.html?spm=a2g0o.productlist.0.0.13421c76KbZxUI&algo_pvid=36014c5d-1598-4197-9e4f-981f3fa6679e&algo_exp_id=36014c5d-1598-4197-9e4f-981f3fa6679e-46 Link to comment Share on other sites More sharing options...
Meezo Posted August 24, 2021 Share There's a thread here on bikehub that some knob had written on how to repair these. That same knob has repaired a lever not too long ago too... Search for XT 785 work around CdT85, dirtypot and Adr!@n 1 2 Link to comment Share on other sites More sharing options...
Meezo Posted August 24, 2021 Share It's not the seals that's the issue it's the piston that gets the grime/dirt oil build on them. My story is the fit and forget is great for Shimano brakes, but for longevity of them bleed every season Link to comment Share on other sites More sharing options...
Meezo Posted August 24, 2021 Share My spelling and grammar is k@k off to get coffee Link to comment Share on other sites More sharing options...
Adr!@n Posted August 24, 2021 Share 1 hour ago, Meezo said: There's a thread here on bikehub that some knob had written on how to repair these. That same knob has repaired a lever not too long ago too... Search for XT 785 work around 59 minutes ago, Meezo said: It's not the seals that's the issue it's the piston that gets the grime/dirt oil build on them. My story is the fit and forget is great for Shimano brakes, but for longevity of them bleed every season 58 minutes ago, Meezo said: My spelling and grammar is k@k off to get coffee Ha, thanks. I did have a look at that thread - and I have successfully rebuilt levers before, but I feel bad about having levers that I have no internals for because I think they can't be saved, it just feels like waste. I'll have a look again. Link to comment Share on other sites More sharing options...
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