At the end of the spiral balance is a small hole... you will need a tool for this... (look on line and buy one ) it has a small hook on it... move your spiral up by hand until it stops... take the tool insert tip into hole and turn the spiral about 10 times... ( clockwise ) ... then using that same tool move the spiral up in to the area that will hold it...( this might not be easy ) but it will kind of be on a ledge that will hold the two small pins... the tension will hold it up... do both sides so the number of times is 10 and giving the same tension on both sides.... slowly raise the window...
Good luck !
You would not need to have a jack to be able to lift something up. Through the use of some pieces of framing material (such as common 2x4's as they are called here in the USA) you can pry and lift things with relative ease by the mechanical advantage of a lever. Cut the vertical piece to just the right length for the application and then with the help of at least one of those four friends you may be able to get the upper window into place.
![enter image description here](https://i.stack.imgur.com/gSVAn.png)
Some things to think about with this.
1) The window may actually be stuck in its frame and unable to move. The wood over the years could have swelled and locked the window in place.
2) Coats of paint applied to the window and the frame may have locked in the window as well and thus not be movable at all -- unless the paint was all removed first.
3) If you do try the lever bar approach shown in my picture make sure to apply the pressure to the window near the frame under the side rail of the window. To apply in the middle away from the rails will put undue pressure on the glass and could result in breakage and / or personal injury.
4) Applying excessive pressure in one spot, either on the window itself or on the sill area below can damage the wood. This would be especially true for windows that are made of softer type woods like pine.
5) When using a lever scheme take the time to plan out the activity and how it will be setup. Without careful setup and applying pressure to the lever in the correct direction you could cause the fulcrum board to kick out sideways and pose a danger to either yourself, the window glass, something outside or someone below the window area.
Best Answer
I may not be able to tell you who the manufacturer is, for the letters you found on the glass may be the insulated glass manufacturers initials, not the window makers. There should be someplace on the window, a window manufacturers label or something.
The window, since the ballast has broken on one side has in essence, has tilted to one side, even though it may not be obvious. The ballast is trying to lift one side and the window, being quite heavy is wanting to stay closed on the other side.
To counter effect what the window is wanting to do, you need to push up on only the side the ballast is broke, and pull down on the side the ballast is working. Of course you need to push up harder than you are holding down the other side, or it won't work. Depending on how bad it is jammed, you may only need to push up on the upper corner where the frame (sash) around the glass give an edge to push up by. You may also need to pull down hard on the ballast side to set the window down all the way, so you can then try the other things I mentioned earlier.