If it was opening too quickly move it to the next lower hole.
Old style garage door side springs.
As a result you may run into balance issues if you only replace one spring.
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Retest the door balance as you did in step 1.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Adjust the springs on both sides of the door the same way.
Once the spring is free of tension remove from its track hanger.
Roll up doors with tracks and.
Garage door springs come in three basic types and each is measured differently.
Many conventional doors with hinges at each side use one piece springs at each hinge.