Garage door springs, cables, brackets and other hardware attached to the springs, are under very high tension and, if handled improperly, can cause serious injury. Only a qualified professional or mechanically experienced person carefully following the manufacturer's instructions should adjust them. Do not attempt to repair or adjust torsion springs yourself. Never remove, adjust or loosen the screws on the bottom brackets of the door. These brackets are connected to the springs by the lift cable and are under extreme tension.
Lubrication Regularly lubricate the moving parts of the door.
However, do not lubricate plastic parts such as plastic rollers and plastic idler bearings. Consult the door owner's manual for the manufacturer's recommendation. Door Balance Periodically test the balance of your door. Start with the door closed. If you have a garage door opener, use the release mechanism so you can operate the door by hand when doing this test.