Front Brakes Binding
Posted December 03, 2004 - 04:46 AM
Posted December 03, 2004 - 07:18 AM
remove the cylinder and pads and keep pressing the lever, till the pistons fall out
if one of the two is coming out faster, block it, and keep on pressing the brake, till they both drop out
Posted December 03, 2004 - 09:44 AM
I did a 60 mile snow ride the weekend before and blame that for packing grit into the bearing. I check the bearing everytime I re-tire, which is once a month.
Posted December 03, 2004 - 12:32 PM
If the drag is more than usual you will feel it and you may even get a humming sound from your caliper when your pistons are binding in the caliper and there is some brake pressure pulses vibrating thru the sticky pistons.
Posted December 03, 2004 - 02:09 PM
Remove the caliper and pads. GENTLY pump the brake lever as you are watching the pistons. One piston will start to move. Only let it move out about 3mm. Then clamp or wedge that piston so it can't move anymore. Continue pumping GENTLY, so that the 2nd piston moves out by about 3mm. Check that the fluid in the master cylinder hasnt run dry. You may find this piston is tight and doesnt want to move. If this is the case it's tome for some new piston seals and a good overhaul of the caliper. If all is well, clean the exposed area of the pistons (very important) and push the pistons back inside the caliper and reassemble. If you do find that you need replace the seals, make sure you clean in the bottom of the seal grooves very well, as this is what generally causes piston binding. Replace the pistons aswell if they are scratched or damaged.