I have a '96 explorer which I have bee trying to track down a pull to the right and it is driving me crazy. Car has 159k miles on it. When I brake there is a pull to the right. So far I replace caliper with all new hardware. Replaced the rubber brake lines to each caliper. I swapped the pads left to right(thinking I might have a bad/glazed pad) And I still have a pull. It has gotten better but it is still there. As a side note the right wheels shows more brake dust than the left. Could it be a Bad hard line or bad master cylinder(I believe the master has a proportioning valve in it)