There are two different ways to calculate the length of the chord.
How to level a garage door with two springs.
This video will show you how to repair a mis aligned garage door cable.
Diy garage door repair and save money.
If it was opening too quickly move it to the next lower hole.
With an extension spring door the goal is to take all the tension off the door before you even think about touching a spring you can do this by opening the door all the way and propping it up with a ladder.
A perfectly balanced garage door will be easy for you to open and close.
Open it just as wide as you can without hitting the garage door opener s stop bolt and place a clamp on the track on both sides to keep the door in.
If your garage door cable is at an angle or l.
Other problems frequently ensue when a single spring is used on a double car garage door.
To calculate measure the starting and ending distance that the shaft will travel.
If the spring breaks near the stationary cone a large portion of the spring spins loose with the winding cone secured to the shaft.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Many manufacturers have cut costs by using a single spring on a double wide 16 steel garage door.
The best and easiest way to level your crooked garage door.
Before you begin leveling your garage door you need to determine the size of the gap underneath your door.
Adjusting an extension spring door.
Perfectly balanced garage door.
Retest the door balance as you did in step 1.
Once the spring is free of tension remove from its track hanger.
Adjust the springs on both sides of the door the same way.
Manually in the event your garage door opener fails or you have a power outage.