If it was opening too quickly move it to the next lower hole.
Adjusting garage door tension rod.
Adjust the springs on both sides of the door the same way.
Take a wrench to loosen the two screws on the cone.
Lower the door and use 2 metal rods to adjust the tension in the spring.
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 the rod comes loose then the torsion spring could snap and cause bodily harm.
Once the spring is free of tension remove from its track hanger.
Open the door fully by hand.
Have another person hold the rod in place to make sure that it doesn t come out while you begin to loosen the screws.
If the door remains at the halfway position.
If your garage door cable is at an angle or l.
This is accomplished by opening the garage door as fully as possible until it hits the stop bolt on the track.
Position a stepladder at the area of the automatic opener.
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If you need to increase the spring tension hook the spring onto a lower hole on the track hanger.
Lower the garage door clamp or bolt it shut so it can t open and insert 1 metal rod into 1 of the holes around the perimeter of the spring.
You must release the tension on the garage door springs before attempting adjustment or replacement.
Unplug the power cord to the opener.
Close the garage door.
Lift up the door halfway from the inside using one of the cross members.
Retest the door balance as you did in step 1.
The screws will need to be loosened to move the cone and adjust the tension of the rod.
When you release the set screw you have to have a rod in place and be holding it to control the force of the spring.
Then insert another rod into a hole below the rod you already inserted.
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.
Adjusting garage door springs of this type is not recommended for the average homeowner.
This video will show you how to repair a mis aligned garage door cable.