This is not a killer task. It is however one that takes two people if you have never done it before.
You will also need a large clutter free flat space to carry this out and a fare amout of patients. I had to walk away and come back after a brew!
Take blind off the window
Some blinds allow you to retension with out taking appart
See Haynes manual
If yours don't
Remove the white ends. One of these ends is connected to the centrel core that tensions the blind.
If you can help it do not let the blind unravel.
I allowed this to happen and carfully sprayed WD 40 in to
the spring.
The second person can prevent unravelling by holding the center tensioner. If you do this, to tension it further just turn the center shaft in the direction of most resistance. this will add more tension.
When reassembling in reverse order make sure the person hold ing the tensioner does not let go.
If you have allowed the blind to untention. You just have a lot more turning to do and it might take a few goes to gain the required tension.
You can only do this by putting the blind back at the window and tring it out. Be patient!!
Paul
December 2007