If you have a Crary Air reel system that has a gear box direct drive, the only thing you can do is take the squirrel cage off. It should take about a half hour. Remove the discharge hose off of the blower, then split the blower housing in half to expose the squirrel cage. Take two long threaded bolts and screw them down into the threads of the cage and it will force it off the drive spline. Take a drive belt of the blower drive if the air system is belt driven.