4 Unlock the shed garage door, and test the tension by slowly opening and closing the hand. The door should move freely but stay under control. Use the rotary knob to adjust the tension if you are not satisfied with the way in which the door is moving.
Over time, the springs can stretch out and drop power, so you may need to replace them with new ones. 2 Slide coil springs on the bar that runs along the middle of the garage door. Adjust them so that the red is on the left side of the garage door and the black will be right. Slide a cable drum on either end of the rod. Lock the cable drum in place by tightening the screws. Place the springs in the middle of the bar, and tighten the bolts in the storage center cone. 3 Place the end of a bar facing the hole in the end of one of the coil springs. Pull the bar until it becomes a quarter turn. Check your garage door manual to find the recommended voltage. A general guideline is a revolution for every foot of length of the garage door.
Shed garage door – The coil springs of garage door is an important part of his congregation, especially in case you have an automatic door opener. If the springs are not installed properly, the opener must exert more effort to increase the weight of the door, which can damage the garage door and tracks that hold the door.