Bearing removal and replacement.
Remove the Flying Saucer wheel from the mounting bracket using the hex wrench which was included with the wheel. The bearings are a flanged, press fit ball bearing. To remove the bearings, insert a screwdriver into and through the hole in the bearing. Gently tilt the screwdriver to the side. This will lift the flange of the bearing. Insert the edge of the screwdriver under the flange and twist the screwdriver slightly so the bearing begins to elevate. Repeat this in several positions around the bearing so the bearing moves up evenly. If this is done gently, no damage to the wheel will occur. If high, uneven force is used, you may bend the bearing seat. This can be repaired but gradual removal of the bearing should avoid damage. Continue elevating until the bearing comes free of the bearing hole. Take a new bearing and press it in with your thumb.
Refer to the pictures below for the various steps.
Lower bearing tilt bearing with screwdriver
Gently pry up bearing Continue to elevate bearing
After removal Press in new bearing with thumb
Upper bearing being tilted Upper bearing being elevated