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I am restoring a 100# Fairbanks-Dupont Power Hammer that went through a fire and then sat out for a year.. I have been able to remove the ram and toggle arms with a minimum of trouble and have them moving freely. The problem is the drive shaft. The brake is released and not touching the drive pulley. I have been spraying regularly with PB Blaster and squirting it into the oiler holes. One problem is the oil holes are on the side of the shafts so I am not sure that oil has migrated all the way around the shaft. I then wrapped a sling around the drive pulley and lifted it with my hoist. The pull is in the direction of rotation and thought it might free the shaft but the machine just lifted up instead. So now my question… I am considering attaching my arc welder leads to the drive pulley and fly wheel which sit on each end of the drive shaft. I am hoping that this will create enough heat to expand the shaft slightly and then release upon cooling. So is this crazy and/or is there another suggestion on how to get the shaft to release and turn. Thanks for your help.