Mec 9000G 20ga loader Jumps so bad the piston on the rear of the machine jumps from its bottom anchor. I had not used it for about 15 years but covered from dust. None the less I gave it a good cleaning and lubeing per the Mayville Youtube. It had been working OK when last used. Can't find a you tube that might help me with the adjustment that may stop the jump. If I remove the index rod and advance the shell holder by hand like the grabber 8567 it works fine and the advance is smoth as silk. It is some thing in the auto advance system I am just not seeing. If you have had this problem and fixed it please tell/teach me how to fix it. Al
