Bicycle Mechanics - Disc brake pistons are pushed in and are barely coming back out

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xfimpg
06-10-10, 06:03 PM
Hi

I'm cleaning out the pads on a Deore M486 disc brake and I pushed the pistons back in and flush to the inside of the caliper as one of them was really sticking out, but i didn't hear it pop.

Now the pads are back in but the pistons will barely come out.
Is there a simple fix to this?

Thanks!


Luke52
06-11-10, 12:46 AM
Like I said in my PM, I've never had this issue, so I'm not sure what you could do.

Have you tried working/pumping the lever a few times?

snafu21
06-11-10, 03:18 AM
Airlock. Bleed them.


xfimpg
06-11-10, 05:58 AM
Airlock. Bleed them.

ok, thanks.

snafu21
06-11-10, 06:38 AM
and if that don't work, you have a blown cylinder seal, or a leak...

xfimpg
06-11-10, 12:35 PM
and if that don't work, you have a blown cylinder seal, or a leak...

New from March so I think it's air.