I have 12 non-tilting vertical sliding windows. All the same height. 10 are the same width and 2 are a bit wider, but mechanically the same design. I'm not certain what series these are for replacing the spiral cartridge nor how to remove properly for identification. I've seen your video where you can remove the bottom plate, then disconnect from the top, but there is no bottom plate here.
These are original windows. house was built in 1991. There are no markings. Just the photographs I included. The windows stick and don't lift well. Maybe it's a spring mechanism that is worn, or maybe they are just gunked up and need servicing. Can't figure that out till I can remove them and also price out what replacement costs are. Thanks
