When changing my lever, some how I pulled the plunger and spring partially out of the rubber boot/grommet. I was having trouble getting it to go back in so I had this brilliant idea to pull it out completely and reinsert it. I was able to get it back into the small hole in the grommet by using a screwing action. Everything looked honky dory and I went for a test ride. A block from my house I noticed the brake lever was stiff with no pre-travel and then I came to a stop. The Master cylinder had pumped up and locked the front brake. All I could do was release some brake fluid from the bleeder screw to get under way again. Went home and after using the brake a couple of times it pumped up and locked again. I bled again and it pumped up again. I suspect the spring that is attached to the plunger has something to do with my problem.
Any suggestions? Looks like I can't ride until this is fixed.