Over the weekend I adjusted my parking brake (bell crank and expander bolt) and today when I drove it it felt like the rear wheel was hopping @ ~30MPH. After removing the wheel the rear rotor was HOT. Tried pulling the rotor off but no luck, it'll wiggle but won't come free. It feels like to brake shoes are "wedged" inside the rotor and won't let go. I'd appreciate any thought on the problem/solution. TIA!