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  #1  
Old May 8th, 2003, 12:02
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LAWNMAN323 LAWNMAN323 is offline
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overextended caliper piston, how to compress?

I accidentally pumped my brakes when my front caliper was off the rotor with no pads on it, so the piston is fully extended, I can barely fit the rotor in the opening, let alone 2 pads.

When I compress the piston with the bleeder screw open, I feel binding in the piston.

How do I compress it? Thanks.
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Old May 8th, 2003, 12:11
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Mike L Mike L is offline
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A c-clamp usually works well to compress it back down.
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Old May 8th, 2003, 12:31
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LAWNMAN323 LAWNMAN323 is offline
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I tried that, with a piece of flat steel accross the piston to keep it straight - I can't get enough leverage on the c-clamp to compress it. the piston is fighting me too much.
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Old May 8th, 2003, 12:34
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Remove the cover from the master cylinder and scoop some fluid out so that it doesn't overflow as the fluid returns from the wheel. Crank the clamp slowly so that it doesn't flow back like a fountain and get fluid everywhere.
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Old May 8th, 2003, 12:44
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You took the words right outt'a my mouth!
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Old May 8th, 2003, 13:02
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You may have the piston so far out of the bore of the caliper that it's cocked in the bore. Pushing now will only aggravate the problem. Make sure that the face of the piston is PERFECTLY PARALLEL to the plane of the disk before using the C-clamp.
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Old May 8th, 2003, 19:36
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LAWNMAN323 LAWNMAN323 is offline
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Thanks for the help, guys - I took it to my local shop and I had it crooked, they straightened it out for me for free.

Live and learn I guess!
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