Delta 1400 bath Valve handle will not come off. Set screw has been removed. Soaked in WD40, soaked in white Vinegar solution. Still will not come off. Handle is 2 pieces. Half of the handle unscrews and removes but main base of handle will not pop off Any help would be appreciated

If the set screw is removed then it needs a little force to remove the handle, I am attaching the image bellow if it will help you, Good luck.

John