You must attach the bracket that connects the arm to the door before you can attach the arm itself.
Garage door arm adjustment.
You may also have to adjust the position of the door bracket shown in the third image.
These may be on the side of the box but are usually at.
Have a helper steady the ladder.
Once the spring is free of tension remove from its track hanger.
This video details how to adjust the opener force and travel of the door.
Retest the door.
To adjust your garage door s side mounted springs first open your door fully and secure it in place with a c clamp below the bottom roller.
Place a stepladder beneath the box portion of the garage door opener.
Adjust the springs on both sides of the door the same way.
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.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
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.
Settling is a problem for garage doors as it changes the way the door sits in the frame.
Please help support my channel so i can continue to make and provide the best possible video content for you to enjoy http www solwayplumbers co uk donate.
If you have a wooden garage door then you can trim the door down to make it fit properly.
Look for two limit adjustment screws.