Once in place disconnect the garage door opener.
How to chage springs on garage door.
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.
Take up the left garage door spring and put it by the left side of the door.
The left spring should have the wire coiling from the left the right spring should have the wire coiling from the right.
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.
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.
This video will help you weigh a garage door with extension springs.
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.
Use a piece of tape to mark the current placement of the pulley so that it.