Use a piece of tape to mark the current placement of the pulley so that it.
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.
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.
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.
Open the garage door to remove all spring tension and clamp it in place.
This video will help you weigh a garage door with extension springs.
The left spring should have the wire coiling from the left the right spring should have the wire coiling from the right.
Once in place disconnect the garage door opener.