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> rear caliper piston, not winding back on
JFG
post Oct 15 2017, 09:08 AM
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I started the refurb of my rear calipers today. i tested it before stripping and the hand brake piston worked as it should.

I watched the pmb youtube video and stripped the caliper but did not remove the handbrake mechanism. The easy side was refurbed first and all is good there.

When i tried to reassemble the hand brake side i cannot get the piston to wind back on. I've tried lots of ways but no joy. So i checked the threads and both seem ok except for a small notch inside the piston itself (see pic)

When i checked the threaded part inside the piston i can turn it quite freely, so trying to wind a bolt into it won't happen as there is no resistance.

Any ideas? Is the mechanism inside the piston knackered?

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