Unplug the power cord to your garage door opener.
How to replace a spring in garage door.
Disconnect the spring from the track bracket and the spring pulley.
Replace extension garage door springs by following these steps.
Open the garage door to remove all spring tension and clamp it in place.
This should take about 3 minutes and you don t need to remove the springs or loosen the tension to measure them.
Once in place disconnect the garage door.
Take up the left garage door spring and put it by the left side of the door.
Some garage door openers have a neutral position for the trolley disconnect.
Get it right the first time.
The left spring should have the wire coiling from the left the right spring should have the wire coiling from the right.
Disengage the opener from the door.
There are no cables or pulleys to deal with and the springs have internal safety rods.
A safety cable is threaded through the spring to.
On one piece doors with side springs you open the door to relieve the spring tension and simply swap out the springs on the opener arm mechanism.