Upper tension assembly
Upper tension assembly for some Globe and Kenmore sewing machines are the same. The barrel width is (18mm/11/16″) and a spring that pulls up. The barrel width must be the same to fit into tension unit hole. When you open the light cover you can see the screw holding the upper tension assembly. The upper tension assembly should just pull out when the screw is loosened. Just take not of the tension release pin not to loose it.
Upper tension assembly MO-2052
Make sure not to push the upper tension assembly to deep so that the tension release pin push the tension plates open. You’ll have zero tension then. If it does not go deep enough your tension release won’t function. The presser bar lever can’t push the tension release pin
You can see in the images below from a Globe 510 sewing machine where to find and loosen the screw holding the upper tension assembly.
Upper tension assembly MO-2052