Originally Posted by rustbuckett68
another way to "adjust" the door is to put a 2x4 or similar on the sill, almost close the door, and lift it up. Door was probably bent
from years of use, vibration, leaning on it. Maybe put a straight edge down the front of the door and see if the hinge areas are tweaked.
If so, bend back.

that is how they would do it on the line, usually a couple of LARGE AA's and they knew exactly where and how much to apply. I've never had much luck with it though, even when using a jack shruggy beer wink