Originally Posted by John St.Amant

Remove the uprights from the car.
Clean the parts with non residue spray ... electric motor cleaner.
Take a Q-tip and some medium super glue and make a thin layer around the plastic there the outer race of the bearing rests. Let it dry and try to fit the bearing ... if it's still lose... add another layer . Make sure you let the glue dry completely before attempting to fit the parts together.