Anyone know anything about disc brakes?

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snottyotter in reply to @atz

What brake was it? I don't think draining it will achieve anything more than flushing it through without draining it.

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atz in reply to @snottyotter

Ultegra. Something is wrong as air seems to get into it quickly. No obvious leaks though.

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Netakure in reply to @atz

You won't achieve nothing emptying the system and filling it again. I won't even bother to replace the fluid if it's freshly bleed. Just use the cup and remove any air, if it losses pressure over time there's definitely a leak somewhere.

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