Join Date: Oct 2005
Location: The Summit of Lee
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How old is the system? Has it been rebuilt? (nevermind...from the questions above, I can deduce the answer to that)
May have a sticky piston.
Here's what I did one time to free a piston:
1. Push both pistons all the way in...like "retracted" in not "clamped" in. (leave pads installed and use a tiny "flat bar" or broad/flat metal prying device.
2. Put metal flat thingy between the pads (where the disc rotor goes) and hold firmly against the pad/piston that's working properly.
3. Have a buddy gently pull the brake lever while you impede the movement of the functioning piston. This should cause the other piston to move.
4. Let up on the lever and push pads all the way back to the retracted position.
Do this a couple times and lube the pistons with Hayes compatible brake fluid. If sticky piston persists, have the caliper rebuilt or buy a decent set of hydraulic disc brakes.
Last edited by ed; 12-06-08 at 12:14 AM.