Stuck piston

[Jim britt]

Hello, could use a little help please, my rear brake was making a rattling noise after cleaning and centering found out the one piston is stuck in the housing, anyone know how I can get it to come back out so I can give it a good cleaning.Thankyou.

 

[Viking1]

If it is hydraulic you may be able to squeeze the brake lever with the wheel removed to force the piston from the caliper housing. Or wrap a rag around the piston and apply air pressure to the caliper. Either way is messy, so beware.

 

[Gionnirocket]

Apply a little WD40 around the piston and gently actuate being sure not to contaminate the pads or rotors. Probably best to unbolt the caliper and put in a spacer to prevent over extending the piston.