Slide the spring that you placed on the left side of the door at the beginning onto the shaft as shown.
How to install a single garage door spring.
Many of the accidents that occur while fixing garage door springs are due to installing springs that are too strong.
Disconnect the garage door opener so the door remains closed.
Screw on the top hinges and rollers.
This video will show you how to replace the extension springs on your garage door.
Tie the extension spring to the roller track then detach the cable from the bottom bracket with a pair of pliers.
Single torsion spring replacement.
Secure cable end to bracket.
Unplug the garage door opener and clamp the door to the track.
This video will show you how to replace the extension springs on your garage door.
Open the door then tighten locking pliers onto the track to hold the door open.
Feed steel cable over the pulleys at the end of the track.
Hook the garage door spring onto door track bracket.
The stationary cone must be toward the center of the garage door while the winding cone must be toward the outside of the door.
Release the tension on side mounted extension springs by lifting the door and locking it in place on each side with a pair of locking pliers.
Slowly pull down on the winding bar until the garage door rises 3 and the roller hits the vise grip on the track.
You may need to loosen the set screws for the spring to slide onto the shaft.