Coat the overhead torsion springs mounted above roller tracks with a garage door lubricant. All springs will eventually break because of metal fatigue and/or corrosion, but lubing them at least once a year will make them last longer. Spraying can be messy; it's smart to protect the wall behind the spring with a piece of cardboard. Garage door lubricant is available at home centers. Lube the rollers, hinges and track while you're at it. Learn more garage door maintenance tips.
Overhead garage doors, whether they roll up in sections or swing up in one piece, operate on spring tension. The door moves on metal tracks on the garage walls, and a heavy spring or springs provide the power.
Advanced Garage Overhead Door Repairs: Install the left spring and insert the torsion bar into the bearing bracket. Read more: http://www.familyhandyman.com/doors/garage-door-repair/advanced-garage-overhead-door-repairs/view-all