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@M_V
Was struggling to get my front m755 4pot bedded so took it off a week or so ago and replaced with a BB7 for time being.
Got time to have a look at the m755 today and turns out the caliper is weeping where the two halves join. :(
As I understand, Shimano don't do (and never have done) caliper service kits so finding a legit m755 seal is not going to happen, I wonder though if there'd be something I could get to do the job or infact if Shimano would have just used something readily available rather than design their own little rubber seal?
Also wondering if a modern Shimano caliper might have a seal that I could steal and use, there's any number of models of Shimano calipers on CRC for under £20 which I'd happily pay to keep the 4pot running.
I presume that there'd be no point in trying to measure the current seals as they'll likely be swollen and or corroded from use?