Place the new garage door springs against the garage door position the springs so that the ends are facing you and coming from opposite directions.
How to chage springs on garage door.
Open the garage door to remove all spring tension and clamp it in place.
One cable attaches to the bottom of the door runs up and over the pulley above the door and around the spring pulley and then attaches to the door track bracket.
Doors with extension springs have two sets of pulleys which are sometimes called sheaves.
Do not use a digital scale as they often will not respond to the door weight changing as rollers no longer stick to the track.
Once in place disconnect the garage door opener.
One at the end of each spring and one at the top of the vertical door track they also have two cables on each side.
This video will help you weigh a garage door with extension springs.
Use a piece of tape to mark the current placement of the pulley so that it.