2.4 The same is true of Older Overhead, BarCol and Raynor torsion springs that have winding cones with inconsistent hole sizes. If you insert a 1/2" X 18" bar in some of these holes you can move the opposite end of the bar over four inches. Bars in newer cones move less than 1 1/2". I've had many of the older cones spin loose from my bars, the last one generating an $1800 emergency room bill. If your cones are like any of these, or if they have more than 2" of play, leave the job of installing torsion springs to a professional garage door mechanic.
Quite a few garage doors come with manual locks, especially older models, for added security for your house. These typically look like a knob or handle in the middle of your door with two bars running horizontally from each side. There may be a small button on the top or side of the handle that you can press to slide the bars across the doors, thus locking the garage door from the inside. It can be somewhat easy to accidentally hit that button, especially if you’re getting large objects out of the trunk of your car near the door.
10.3 At this point you will wind the spring. Notice that the end of the spring on the winding cone points up when facing you. You will wind both springs up and counter intuitively as if you are trying to unscrew the winding cones from the ends of the springs. Begin by turning the spring up 1/4 turn until it meets resistance. This is your first quarter turn. Count "one." Next, insert the bar and raise it 90 degrees. Insert the second bar. This is "two." As you wind the spring it should grow in length the thickness of one coil for every turn. The cone should cover your mark after the first couple turns. Many garage door tradesmen mark the torsion springs with chalk or paint, but this often generates confusion.
With over 300 independently moving parts, your garage door is a deceptively complex piece of equipment. To help prevent malfunctions and break-downs, it is a good idea to occasionally perform a garage door tune-up to keep all of these parts in good working order. A regular tune-up service by a Sears professional can prevent unexpected door problems and prolong the life of your existing equipment. http://m.youtu.be/Z_eZc-kh40c