I have a 450 mounted to my 2072. I forgot to remove the bolt that locks the rockshaft before blowing snow. I bent the original lift rod beyond repair. Made a new one after removing the bolt. Broke that rod too. Bought and installed a new rod, bent that one too. What am I missing? The pins are good in the rockshaft. The blower will lift in the garage but will bend the rod when it meets resistance. Please help!!! Thank you