Need replacements

Thanks for posting. This looks like a 15-087 Pivot Shoe and 15-086 Tandem Block. This setup works with Series 180 Coil Balance springs sold separately. See the videos below. The first shows how to remove and replace a similar coil spring system; it's a little different, but the general principles will apply. The second video shows how to choose the correct spring weights for the new coil springs. Let me know if you have further questions.

Series 180 coil balance diagram