I just did this today with a 1/2 impact gun. The one thing that I did before I started was lube it down with PB blaster for a day. I have a ingersol rand that put out 600lbs in reverse and 300 going forward. Had no problem getting it out Has anyone seen a damper separate from a pulley, what ever the glue/bonding agent that was use to hold it in place decided not to hold anymore.