take the seal out
take the clip off
pull out the shaft with a claw hammer or the valve pulling tool

The seal is rather akward to get out with the shaft in and you have to change it anyway, so you can just pull the valve shaft through it and take it out afterwards. It will cost you a clip too.
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom