Roll-up garage doors may be big and heavy, but they'll respond to a little routine check-up. At your annual garage-door checkup, run through these tips. They'll help keep small problems from becoming large headaches.

If a wheel sticks or binds in the track, reduce the friction between the door and the track by adjusting the track brackets. Loosen the nuts that hold the brackets to the door frame, then make sure there's about 1/4 inch to 1/2 inch of play between the door and the tracks.

Friction between the door and the door stop can be fixed by adjusting the track brackets. Loosen the nuts that hold the track to the brackets and move the track until the door doesn't bind any more.

If the door opens too fast or slowly, adjust the spring tension. Block the door open with a pair of locking pliers, then change the position of the S-hook on the front track brace.

Clean and lubricate the drive chain and track of the automatic door opener once or twice a year. Use a light penetrating oil instead of grease to keep from collecting dirt and grit.

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