Last summer I posted that my front brake locked up. Been away, finally had time to figure it out. I had rebuilt the caliper with new pads a few years ago, but discovered the the brake pad had seized in place. I tried pumping it out by applying the brake lever, nothing. I tried prying, nothing. So decided to drill a hole through the brake pad, and thread the hole with a 3/8" tap, then ran a grade 8 bolt through the pad to push against the piston. Filled the caliper with penetrating oil, and sat it on the woodstove til the oil began to boil. Tightened the bolt, the pad finally began to move. I discovered that the threaded pin that keeps the pad from rotating had backed out, jamming the pad in. Also a lot of rust, which I can't explain, since I don't ride it in the rain. Cleaned it up, and the piston popped out with compressed air. Will install new piston and pads.