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Username Post: Shop Door
Very Senior Member
Posts: 4482

Reg: 12-29-02
05-10-19 04:46 PM - Post#2766138    
    In response to bobb

Wow, $5200 to replace a spring. That should get you a whole new door. I've done a few, but not on a door that big yet. I's not terribly difficult. Just go slowly and methodically. Make sure you have long enough winding bars and that they fit snugly into the winding holes. Make sure each bar bottoms in the hole when you move it as you are winding. I would suggest clearly marking the bar so you can can tell when it's in all the way. Use a solid ladder and keep back from the spring and out of line of anything that can spin or fly apart. Never use a socket or boxed end wrench on the set-screws so the wrench doesn't become a projectile.

Figuring out what direction to wind - Face the spring coil end you're winding at with the wire end at the bottom. The direction the coil end is facing is the direction to wind. If it points right then you wind it right or clockwise. Wind left if it points left. Generally, if the spring end to be wound is at the left side of the spring with the end attached to the wall on the right side then you wind the spring right.

As far as number of turns. count the number of times the cables go around the pulleys and wind the spring about that number, maybe 1 more turn. Test it, it should drop when lifted opened a foot or two but not be very heavy to lift open. If the door starts opening by itself at any point through the travel then it's wound too tight.

Google garage door spring replacement and you can find more good info than you could ever view or read.
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