G.K.L. HA3D Ball Bearing & Large Hinge Doctor, Blue
This tool is designed to adjust new, worn, or improperly adjusted Commercial Butt HInges that cause the door to sag or drag. To fix the door, slip the tool over the TOP door hinge and open the door. This action causes the door hinge to bind while the tool is in place..
Open the door only 3 to 4 inches past the point where it binds against the tool then remove the tool from the hinge, check the door and repeat if necessary.
It's usually only necessary to adjust the top hinge, however if after you've adjusted the top hinge and there is still a large gap between the door and the frame (above the top hinge) them adjust the center hinge as well.
When to adjust the top hinge:
- When the leading edge of the door is hitting the side of the door frame (above the strike)
- When the latch no longer lines up with the strike hole
- When the door shows excessive signs of sagging
