Spiral balance shoe for non tilt single window

Hello, thank you for posting,

You have very old Air Control windows. If you want to keep the windows, instead of replacement windows, you will first need to remove the ball catch at the bottom of the sash, by slipping a thin screw driver or chisel under the lip and pop them out. Now install the 17-014/17-015 bottom sash clips. You might be able to use the hole above the ball catch or drill a new hole. Your top sash guide is no longer available, you might be able to use the 18-034 top guide with some modifications. With the sash out, install the two S300-23 balances that come with the 15-011 shoe in the track.

Now with help, install the sash back into the track in the top open position, with someone holding the sash up, bring the spiral with nylon shoe up to the sash and before locking the shoe in the bottom sash clip, give the spiral three or four turns. You can use the 75-005 tool or your fingers. You will feel the tension building in the balance tube, push the shoe up into the sash clip till it locks on. Do the same on the other side.

Let me know if you have any additional questions. 

Hello,

If the taper screw is not holding the balance tube straight, then try the machine screw. Let me know how you make out!