Outer Limits 4x4 Board

hey guys today noticed odd noise, turned out to be the fornt nut holding on crankshaft pully has disapeared along with the tappered cone washer! now the thread is all ok and im assuming the keyway is still in there cause the pully hasnt actually come off, so it shouldnt have gone anywhere! is there a easy way to check if keyway still in there cause i cant seem to pull off the pully even thou it so loose, it comes out about 10 mm then wont go any further! is it as simple as once the nut and cone washer are removed in which mine are then it should just getntly pop off with some help!