On 4/1/2018 7:21 PM, wrote:
On Wednesday, July 22, 2009 at 8:51:37 AM UTC-7, Jeff Heuer wrote:
One of my garage door tension springs broke and I replaced both springs
with a set that had previously been used in a friend's garage for only 5
years. We installed, them, wound them so that the door was balanced, but
then when raising the door by hand to check it's operation manually, one
of the lift cables loosens as the door reaches the full open height.
Count the cable turns on each pulley.
However the other lift cable remains tight and working properly? We've
tried adjusting the tension in the spring on that side of the door to no
avail? Can you tell me what might be causing this lift cable to loosen as
the door reaches full open height so we can fix it? I will call a
professional at last resort, but we've handled everything other than this
lift cable staying tight issue so far and would like to finish the job?
Thanks, Jeff

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I need a hand with something. I have installed a new door, got everything set up as it should be, but for some damn reason when the door raises about halfway the cables want to come off the rollers. The cable winds perfectly on the roller until it just doesn't stay on, as if the cable is too stiff or somthing. This is stupid.

If the springs are matched to the weight of the door, you need to tighten
the cables to the point that they are still in tension in the up position.
If the springs are not matched to the weight of the door,
you're gonna have to live with a compromise.