Through out the years I had to remove the forks on my bikes. Either to make adjustments, renew the grease, or replace a headset. Now almost everytime I did have to remove a fork it did not come off easy. I had to give it a smack. With a hammer(and a piece of wood for damage control). Most times a tap did not do! I had to bop it real good. Now I'm just curious....after all retaining devices are removed what is holding the fork in place. The stem isn't rusted...there is free movement(on the bearings). So is there anyone knowing the reason for this.