Doors with extension springs have two sets of pulleys which are sometimes called sheaves.
How to replace garage door spring.
Replacing the pulleys must be done with the garage door open.
Replacing your own garage door springs takes only a little time and effort and can save you hundreds of dollars.
Lubricate the spring with garage door lubricant then remove the clamp from the garage door.
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.
The doors with two springs are easy to replace.
If the door remains in place the replacement was a.
Test the spring by lifting the door about 3 feet.
Only then will you be able to order replacement parts and install the new springs.
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.
A pair of new springs cost about 25.
Part 1 of 2.
Always stay out of the path of extension springs when the garage door is operating or when the door is closed assuming the cable or spring could break at any moment and the spring flies off and hits you.
Carefully follow all of the safety instructions in this tutorial.