You need proper tension on a garage door to operate the door by hand or with an automatic opener.
How to adjust spring tension on garage door.
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.
To decrease tension move the hook to a higher hole.
This is accomplished by opening the garage door as fully as possible until it hits the stop bolt on the track.
The torsion spring helps the garage door open and close easily.
There are two torsion springs at each side of the garage door.
If the self closing door to your garage isn t closing hard enough to latch properly or the door slams shut you can adjust the spring hinge tension with a hex wrench and pliers.
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How to safely adjust your garage door spring.
Remove the locking pin.
Start by removing the locking pin photo 1.
How to adjust garage door tension.
If the garage door isn t opening or closing properly then check the tension on the torsion springs for needed adjustments.
If you need to increase the spring tension hook the spring onto a lower hole on the track hanger.
Hold the garage door in this position by attaching a c clamp to the track at a point below the lowest door roller wheel.
You must release the tension on the garage door springs before attempting adjustment or replacement.
The springs are located at the top inside part of the garage door.
This video applies t.