I was always taught that when you grease a spindle that you grease it until you see grease popping out either at the top or bottom of the spindle. Is this correct? Will this do any damage to the seal since you are allowing grease to burst out of the spindle. If you don't grease it until grease pops out, how would you know if you added enough grease to it? I just wanted to get some others thoughts on the issue.