Slip the collar on with the tang protruding out the bottom slightly with the setscrew snug then install the dist which'll slide the collar up just the right amount & no more then remove the dist being carefull not to disturb the collars' vertical position on the shaft then tighten the setscrew appropriately & use some loctite then reinstall it in the eng. My prior post was on the OE collar higher up on the shaft with the roll pin thru it