Both sliding doors on rails and garage sliding doors have one thing in common: both have a garage door spring system. If any of springs that help lift garage door gets damaged, you will have a hard time opening door. Wear of these springs is normal, and there comes a time when you really have to repair them, or even replace them. Know which spring is damaged. There are two types of springs in garage door. Biggest one that is on opening of garage is called torsion spring. These springs come in pairs and if one is damaged, you will have to replace them both. But do not think you can do this on your own. Repairing or replacing a torsion spring without professional help can result in a tragedy for you, or even death.
Other set of springs are known as extension springs and are those that extend along upper left and right tracks of door. These springs help lift garage door. You can repair or replace these garage door spring with help. Do not try to do it alone. Open garage door completely. If you have to lift it, ask for help. Then lock door tracks on lower roller by running track with a tightening screw. Remove damaged spring. In turn, check for any other damaged components such as bearings, pulleys and cables.
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Buy a new set of extension springs, preferably a pair. You will also have to replace opposite spring. An imbalance in force of opposite spring will be generated if only one is replaced. Install new spring, just like old one. Make sure spring is not stretched more than one inch. Do same for other spring that was not damaged. Before removing clamping screws, for safety, verify that nobody is nearby. See if installation is sufficiently stable and there is no danger of spring disconnecting from anchor points. To be safe, contact someone who has experience in fixing garage door springs.
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