Joined: May 2010
Posts: 591
Likes: 1
From: Bucharest, Romania, Europe
Bikes: 1989 Krapf (with Dura-ace) road bike, 1973 Sputnik (made by XB3) road bike , 1961 Peugeot fixed gear, 2010 Trek 4400
Try pounding on the screw from the top of the stem (make sure the screw is mostly undone but still engages the threads, so the screw is pushing the cone at the other end), it should push the cone downward and release the pressure. Then twist the stem repeatedly and pull upward to get it out.