Garage door torsion springs are a key element of the opening and closing mechanism, whether you are using an automatic garage door opening device or lifting by hand. Over time, these sources can lose tension, stretch and pause. With a few common hand tools, you can install new garage door torsion springs to make your door easy and safer to open.


• Mark the locations where the cable drums line up with the bar so that you can replace them when you have finished installing the torsion springs. Cable drums are close to the outside edge of the garage door and tracks.

Unscrew the two adjustment screws on each cable drum and slide the bar toward the center of the garage door. Remove the bar from the final support.

• Slide the cable drum and torsion springs out of the bar. You should be able to slide the springs on both sides of one end of the bar.

• Place the new torsion springs on the bar with the cable drums. The spring with the red end should be on the left if you are facing the garage door. Adjust the end of the bar in the final holder and align the marks on the bar and the battery. Tighten the screw on the cable drums. Move the springs to the middle of the bar and tighten the bolts in the center cone.

• Insert one of the turning bars into the hole in late spring. Push it towards the ceiling, turning the bar a quarter turn at a time. The general rule for adjusting the tension of the torsion springs is to completely rotate the bar for each foot of the garage door. Refer to the owner’s manual for the garage door for the exact voltage recommended for your door. Be sure to put the two sources of the same number of turns to maintain the same pressure on both sides of the garage door.

• Open and close the garage door manually to test the springs before using the automatic garage door opener.

Tips and Warnings

• Be careful when inserting the turning bars into the torsion springs. The tension of the spring can make the bars swing towards you with great vigor.