I left the door in the lift bay alone and just offset the opener completely outboard of the upper rail on one side.
Garage door arm adjustment.
You may also have to adjust the position of the door bracket shown in the third image.
If you have a wooden garage door then you can trim the door down to make it fit properly.
Retest the door.
If it was opening too quickly move it to the next lower hole.
Once the spring is free of tension remove from its track hanger.
Access door gap between floor and bottom of door safety must not exceed 14 reversing sensor.
Once your garage door is secured remove the spring hook from the track hanger which will allow you to move the hook and adjust the spring s tension.
This video details how to adjust the opener force and travel of the door.
You can do this with a jigsaw or a circular saw sanding off the bottom and replacing it in the frame so it sits properly.
You must attach the bracket that connects the arm to the door before you can attach the arm itself.
Have a helper steady the ladder.
Look for two limit adjustment screws.
Adjust the springs on both sides of the door the same way.
These may be on the side of the box but are usually at.
Adjusting the height of the header bracket illustrated in the second image will help keep the curved door arm from extending below the lowest point of the door or the lowest point of the header wall.
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If the door was closing too quickly move the spring to the next higher hole on the bracket.