Pivot shoe replacement coil type

Thanks for posting. This pivot shoe looks like our 15-087, which uses Series 180 Coil Balances. Just look over the specs below to confirm. You needn't use jamb spreaders to remove and replace these shoes; the 'cut out' method will also work, where you cut a hole into the jamb track. The video below shows how to do this. 

Detail of 15-087

Series 180 coil balance diagram

You're welcome! Please let us know if you had any other questions and I would be happy to assist.