Retest the door.
How to adjust garage roller door spring.
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This is accomplished by opening the garage door as fully as possible until it hits the stop bolt on the track.
Find the two springs and corresponding adjustment screws collars these should be along the shaft.
Hold the garage door in this position by attaching a c clamp to the track at a point below the lowest door roller wheel.
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If it is still not closing correctly secure the door again and keep adjusting the spring until your door fully closes.
Detach the old spring from both ends and replace it with the new one and replace the pulleys as well if they are worn out.
If it was opening too quickly move it to the next lower hole.
Adjust the springs on both sides of the door the same way.
Close the garage door and disconnect your garage door opener.
For more advice like how to adjust your garage door s torsion springs read on.
Adjust the spring into the proper position and make sure your garage door closes all of the way.
If you need to increase the spring tension hook the spring onto a lower hole on the track hanger.
To decrease tension move the hook to a higher hole.
Clamp the garage door in place with a c clamp above the bottom roller.
The other is attached to a pulley connected to the cable.
After adjusting your spring unclamp the door and lower it to test the spring.
Here are the steps to adjust common torsion spring mechanisms.
Once the spring is free of tension remove from its track hanger.