I have replaced the caliper and the proportional valve. After applying the brakes several times the rt front locks up. I have bled all 4 and the only way to release the front rt is to open the bleed valve on the caliper. Could it be a brake line or master cylinder? All other brakes seem OK.
Check brake lines they may have gotten pinched very commonok new c/k trucks when you crank the torsion bars up to far you may have hit something and pinched the brake line check those before messing with the master cylinder those are a real pain
754 views
Usually answered in minutes!
I've got a 1985 GMC 1ton I've replace the Hydro Booster, MC, Front break lines and the Calipers, After hitting the breaks the front wheels lock up. and the peddle want come all the way up HELP ME PLEASE................
I have a 97 with the same problem.Changed the rotor .pads,caliper and berings..blead the brakes and now the driver front is locked up.When bleeding the air I can see the capiper trying to bounce back but not back enough to keep it from locking..also put my hand on the proportion valve where there is a rubber cap and that seem to be working..what could I replace next? Amber
my cargo van lockout the driver side caliper when brake all the time some vary sed to mi than the hidraulic valve unit is damaged i replaced all ready master cylinder brakes hoses ,calipers, speed, sensors ,bleeded all system and not works what i can do please?
I am wondering if my master causing this problem or do I need look at something between master and brake calipers
Was wondering if my master cylinder is bad or is there something else between the master and the brake calipers needs to be looked at
My 02 GMC Sierra 1500HD brakes will slowly put themselves on and then lock up. I then have to stop and put the brake pedal right to the floor for a minute then it releases and is good. The power steering pump has a little whine to it when the motor is reved up.
×