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Mastercylinder or wheel cylinder or caliper piston?

If it's a mastercylinder, toss it and get a new one.

Wheel cylinder, squeeze the brake shoes together, if it won't move, toss it.

Caliper piston, use a c-clamp and compress it. Now keep in mind. If it is a rear wheel caliper and it has any slots, like a regular screwdriver groove, or a plus pattern. These cannot be pushed but are rotated either clockwise or counterclockwise. If it's a long slot use a flat bar or huge screwdriver, if it is 4 little cuts in the outer edge, use a pair of needle nose plyers and span the difference. Than use the tools to try turning the piston. It should move fairly easy, if not, toss it and replace. (Rotation of the piston is how the emergency brakes set)

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โˆ™ 2015-07-15 21:31:08
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Q: How can you push a brake cylinder that won't budge?
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