A properly functioning garage door is essential to the longevity of a garage door. Our qualified technicians will replace or repair the warning parts to improve the longevity of the door. A garage door is made up of many metal parts that need to be permanently lubricated to reduce bearing and hinge wear. To understand the proper maintenance of a door, you must first understand the mechanisms of the garage door. A garage door is made up of a few mechanical components. When integrated, it works as a whole.