Yes, you must identify if it's a purely mechanical issue of the rod/ring not sliding thru the field (very unlikely) or electrical issue. One other thing I would check as part of that rebuild process-make sure the spoon and the tip of the skirt must be clean and polished. Those two pieces also need to be perfectly aligned so that the ball will not force the skirt tip out of the cup. Some people lube that spoon cup, but I prefer to leave it dry, but polished with novus, etc.