Here are the steps to adjust common torsion spring mechanisms.
How to adjust tilt garage door springs.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Or as square as possible.
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.
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.
Clamp the garage door in place with a c clamp above the bottom roller.
If it was opening too quickly move it to the next lower hole.
This is accomplished by opening the garage door as fully as possible until it hits the stop bolt on the track.
Close the garage door and disconnect your garage door opener.
Retest the door.
Adjust the springs on both sides of the door the same way.
When closed the door should sit square in the frame.
As someone else mentioned use a rag if you don t have man hands.
If the tilt a door is not closing straight it can be adjusted by moving the adjusting arms up or down as required.
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You must release the tension on the garage door springs before attempting adjustment or replacement.
Then take the springs off 1 by one whilst still propped up.
First of all make sure you have the door propped up in the fully open position either using a 1 9 2 1m metre post pole or another relatively strong person.