Originally Posted by
HillRider
Anyone remember the Park BT-3 brake caliper alignment tool? It was a handle with a slotted end that went over the caliper arms and bent them into alignment. It looked a bit like the Park tool currently sold to align disc brake rotors but was much stronger. I have one and still remember wincing the first time I used it on old Dia Compe brakes before concave washers were provided on brake shoes. It was a crude approach but it worked.
Not suitable for this because the arm is too short and stiff. The boss itself can b corrected (if it's off) but I'm sure the brake has an adjustment built in.