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.
Install old style garage door springs.
The new spring s diameter length and wire size or gauge must be the same as your old spring.
Tie the extension spring to the roller track then detach the cable from the bottom bracket with a pair of pliers.
At american garage door supply inc.
Since extension springs are determined by how much weight they each lift and the pulley system cuts this in half you need to replace your old springs with 200 pound extension springs.
The entire door weight is supported by the pivot assembly.
Attach weather stripping to the bottom edge of garage door.
You can choose and purchase torsion springs and extension springs for just about any commercial or residential garage door project right here inexpensively and without a hassle.
These springs are used with different hardware so the top of the door does not roll along horizontal tracks.
Stand the bottom door panel on the floor in the garage doorway.
Do not try to remove the extension spring that is not broken when the garage door is closed.
Use impact driver to mount hinges to the bottom panel of garage door.
The other style of spring is the holmes one piece or single panel door spring.
Purchase new garage door extension springs.
The easiest way to do this is to take the broken spring to a local garage door dealer or home improvement center so they can help you find an exact match.