Pivot shoe is too wide
A quick learner from Chicago says:
July 14, 2015
Paul from SWISCO responded:
July 16, 2015
Sorry to hear you're having trouble. I see you also bought our 26-147. Both the 26-147 and your old style pivot shoe were used on Seasonal Thermal Guard windows. That pivot shoe isn't made anymore, but the 15-070 is considered the modern replacement. I'm surprised it didn't work for you, I've never had any problems with it before. What is the width of your old pivot shoe? I wonder if your track has dings in it. You may also consider spraying silicone in the tracks.