You must release the tension on the garage door springs before attempting adjustment or replacement.
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.
Here are the steps to adjust common torsion spring mechanisms.
Then take the springs off 1 by one whilst still propped up.
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.
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.
When closed the door should sit square in the frame.
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.
Find the two springs and corresponding adjustment screws collars these should be along the shaft.
If it was opening too quickly move it to the next lower hole.
Clamp the garage door in place with a c clamp above the bottom roller.
Hold the garage door in this position by attaching a c clamp to the track at a point below the lowest door roller wheel.
Once the spring is free of tension remove from its track hanger.
Close the garage door and disconnect your garage door opener.
As someone else mentioned use a rag if you don t have man hands.
This is accomplished by opening the garage door as fully as possible until it hits the stop bolt on the track.
Retest the door.
If the tilt a door is not closing straight it can be adjusted by moving the adjusting arms up or down as required.