Sears offers two different drive mechanisms to accommodate your home and budget. If you're looking for a smooth and quiet opener for a garage door with rooms located above the garage or attached to the garage, the belt drive is going to be the best for you. You can also choose a chain drive opener, which is perfect for garages that are unattached to the home.

Garage door springs can break for a variety of reasons. Extreme heat or cold, for instance, can stress the springs to the point of breaking, or it could be that normal wear on older springs could cause them to break. Whatever the situation, a broken spring can render your garage door inoperable. Your door will not be able to open or close when a spring is broken, and you should stand clear of your door until a professional can assess the situation and correct it. http://youtube.com/watch?feature=youtu.be&v=Z_eZc-kh40c
Measure the various areas where the door will be installed: door-opening height and width, headroom (from top of opening to ceiling), and back room (length of garage). For the headroom, you should have about 10" to 12" of space, depending on the spring system you're installing. For the back room, you should have the door height, plus another 18" or more of space.

When one or both springs break, gravity takes over and you feel the full weight of the door when lifting or lowering it.  It may be possible to pull the door up by hand, although doing so will likely be very difficult. In most cases, two or more people are needed to raise the door high enough for you to drive your car out of the garage. While single garage doors can typically be lifted, double doors are nearly impossible to manipulate due to their excessive weight.
Warning! If the door is partially open and crooked, don’t touch it. Period. It’s a sign your door is off balance, and it’s usually caused by a problematic cable. It’s likely the door is still under tension from the spring, and one false move could send a 150-pound door crashing down, causing damage or injury, says Vincent Johnson, owner of Garage Door Doctor of Cypress, Texas.
Sears garage repair technicians are fast, with same-day, emergency repairs available in most areas. We can replace garage door broken springs, rollers, cables, hinges, sensors and weather seals. We can also adjust garage door tracks and springs to make sure your door operates smoothly. Having problems with your garage door opener? We can repair or replace that too. Check out our line of Craftsman Garage Door Openers. Craftsman is America’s #1 brand of garage door openers! 1 https://www.youtube.com/v/Z_eZc-kh40c&feature=share
9.9 Go to the other side of the garage door and insert the end of the cable into the drum. Rotate the drum until the cable is tight. Slide the drum against the bearing and push the shaft to the right. The marks should line up. If they don't, figure out why and correct the problem. It could be a stuck cable, the garage floor may have shifted, or the vertical angle that helps support the bearing plate may have loosened and shifted. Many garage doors have been installed with a gap between a drum and a bearing plate. The cable drums should always be flush against the race of the bearings. http://youtu.be/Z_eZc-kh40c
Your door’s torsion spring is located approximately one foot from the top section of your door when it is closed. It consists of two large coil springs, and is approximately the length of your arm. Its purpose is to balance the weight of your door so that a door weighing between 160 and 185 pounds is practically weightless to lift. As such, it makes it possible for a garage door opener to raise the door using only ten pounds of pressure.
The Leading (scam) in the industry is the "LIFETIME WARRANTY". It sounds great when presented and seems fair and maybe even a good idea even though the initial cost seems pretty high (on average 450 - 700 dollars) what is not mentioned is the annual required cost (known as the required or annual door maintenance) to keep the warranty valid which if a standard 15,000 cycle spring/s is used should average Ten years, this annual service is usually 90 - 120 dollars. That would be another "900 - 1200" dollars invested in Ten years, that and the initial cost and you could buy two or more "complete new" doors in that time.

When one or both springs break, gravity takes over and you feel the full weight of the door when lifting or lowering it.  It may be possible to pull the door up by hand, although doing so will likely be very difficult. In most cases, two or more people are needed to raise the door high enough for you to drive your car out of the garage. While single garage doors can typically be lifted, double doors are nearly impossible to manipulate due to their excessive weight. http://www.youtube.com/watch?feature=youtu.be&v=Z_eZc-kh40c
Given the complexity of a garage door and opener system, there are a variety of different areas something could go wrong. If your garage door shakes or is very loud during operation, the garage door closes all the way only to immediately open back up, the garage door opens slowly or closes too quickly, or the garage door opener and remote aren't working at all, you should seek help from a professional garage door repair specialist.

A standard double garage door is 7 ft. high by 16 ft. wide. Standard single doors are 7 ft. high by 8 or 9 ft. wide. Because the doors are so large, few home centers and only some garage door stores keep many doors in stock, so expect to order one instead of buying it off the shelf. Garage doors are available in wood, fiberglass and steel. Steel doors, like ours, are light, maintenance-free, affordable, readily available, and have an insulating value as high as R-19.

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