Brake problem

[Gman99]

I have an '85 Silverado. When I bought it the left front brake was locked up and the wheel wouldn't turn. I replaced caliper and pads, bled the system and everything seemed to work fine. I took it out and drove it and right a way the same wheel locked up again. I can't understand why it worked fine in the driveway but as soon as I drove it the brakes locked up.

I have heard that the actual rubber brake lines can collapse inside and prevent fluid from traveling back out of the caliper. I suppose that could be the problem but is there any way of verifying that before I replace the line? I wasn't sure if the proprtioning valve could cause a similar problem.

[obxcars]

Jack the wheel with the problem, spin the tire then step on the brakes the caliper should release immediately.

[95silverado]

My 95 did the same thing, and it was the rubber brake line.

[Gman99]

Just an update on the brake problem I was having. My front brake was locking up completely on one side even though all brake parts were brand new.

I replaced the rubber brake line connected to the caliper and that took care of the problem. The brakes work great now.