Questions and Answers
Dragging Disc Brakes
Q. I have a 1993 F-150 with 153,000 miles on it. The front brake rotors became warped a while back, so I had them turned and I put them back on. This cured my pedal pulsation and vehicle hopping problem. After about 6,000 miles it happened again. This time I noticed that the brakes were dragging, so I replaced the phenolic calipers with rebuilt steel calipers and turned the rotors.
This fixed the problem for about 8,000 miles, but my truck is hopping under braking and the pedal is pulsating again. I did not replace the hoses to the calipers when I did the calipers. Could the hoses be partially collapsed internally causing the calipers to drag, or is there some other reason they are dragging and causing my rotors to warp. I am assuming that this dragging is what is causing the rotors to warp, because they should not be doing this so often. Any help is greatly appreciated.
Thanks,
TravisA. It is possible the brake hoses have an internal restriction. Especially if vice grips or some other clamping device was used to pinch them off too tightly while a caliper was replaced.
It is also possible the master cylinder is going bad and not releasing the pressure when the brake is released.
Additional Information provided courtesy of ALLDATA
