If the expander wedge is loose it should come out with a bit of force. Try some wd40. Looks like it was painted without removing the stem so paint may have ran down Inbetween the stem and the forks and is acting like glue.
@Greggbell started
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If the expander wedge is loose it should come out with a bit of force. Try some wd40. Looks like it was painted without removing the stem so paint may have ran down Inbetween the stem and the forks and is acting like glue.