Hopefully you follow the well documented procedure for removing the CRT.
Cabinet face down, having a padded surface preset to place the CRT on when removed ect. The 21AXp22 has that metal flange that provides a good place to grip the tube when lifting out of the cabinet. Also marking the position of neck components before removing them. Perhaps taking photos of all the components and mounting hardware prior to removing the tube. Be sure to double check that all electrical connections are disconnected before removing chassis & CRT. And, of course, eyewear protection and perhaps gloves.
SAMS has the basic instructions, usually on the last page.
Take your time,
-Steve D.
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