[koates]

Dave, should be no (zero) movement back and forth in the armature shaft. You need to establish if the movement is the armature shaft moving inside the inner bearing or is the bearing outer race moving back and forth in the generator cast iron end housing. The armature shaft has a step to which the inner bearing sleeve butts up hard against the step. You need the correct pulley for that to happen and it needs to be done up tight on its armature shaft thread with a circlip on the end of the shaft. The outer race has about 3 dished washers and felt seals each side of the bearing depending on the gen type which need to be all in place. See an exploded drawing of this in the Ford parts books. The bearing retaining circlip needs to be in its groove in the end housing to hold everything in place and prevent four and aft movement. Lots to have exactly correct here. Regards, Kevin.