On Jul 22, 11:51*am, (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.
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?

There are two types of door spring systems. It would help if you
mentioned which type you have.

I have to assume that you have the type with the two springs on a bar
directly above the door opening.

The cables are not winding on the spools evenly. They should wrap a
single layer of cable on each spool. If you look, you will probably
notice that one spool has the cable wrapping on itself. This causes
the effective diameter of that spool to be larger, and to wind up
cable faster.