Originally Posted by
bicyclepost
What could the problem be and what should I do next?
It looks like you may not have loosened the bolt enough as the wedge still appears to be engaged with the stem. You should usually be able to loosen the bolt until it starts to extend out of the stem and then rap it with a soft mallet or block of wood and that should loosen it enough for removal.
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"It is the unknown around the corner that turns my wheels." -- Heinz Stücke