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Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

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Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

Old 05-25-20, 08:18 PM
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Lrdchaos
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Cleaning Ultegra hydraulic disc brakes...probably wrong forum.

I apologize if this is in the wrong location. I have a Giant tcr with Ultegra 8000 hydraulic disc brakes. The front brake is dragging a little, itís a little slow to release when I let off the lever. It appears that the piston that pushes the brake pads together doesnít reset all the way. Can I squirt the entire bare caliber and pad with brake cleaner to see if it releases? Or what is the best fix?
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Old 05-25-20, 08:46 PM
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Shinkers
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I've never actually cleaned my pistons, but something that I've done when this happens is pull out my pads and reset the pistons with a plastic tire lever. Push them both in all of the way, then put the pads back in and realign your caliper (if it needs it).

This has also been a sign for me that my pads are getting worn and the pistons are sitting out too far.
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Old 05-26-20, 08:24 AM
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NoWhammies
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I agree with Shinkers I do pretty much the same thing. Sometimes what I'll do, before pushing the pistons back in, is spray them down with rubbing alcohol. I will then thread a shop towel through the housing to clean out the break dust. After a couple of minutes letting the alcohol evaporate, I'll push the calibers back in with the plastic tyre lever.
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