I have an 8-year-old old Avid Juicy 3 and I accidentally pressed the front brake lever while the wheel was removed. I used a flat-head screwdriver to reset the pistons. When I spin the wheel after resetting, it works fine, but when I press the lever it doesn't retract and it rubs against the disk. I thought the oil pressure was the problem and I let some oil out of the system.
- Is this because of the dirty pistons?
- is it okay that I let some oil out? (Few drops of oil)
Plus the Avid Juicy 3's piston looks weird and I don't know how to clean it. It's shaped like a cone... (Plus plus, i don't know what kind of DOT fluid my brake uses –it's green.)