Have you purchased the seal kit ? You will need it and a grinder. Go ahead and peel that fat foam seal from the top and inspect the assemblies. You should find a wavy spring washer and a thin steel wear washer at the top. Fiber washers are located on both ends. The fiber washer at bottom is probably there even though you can't see it yet.
If those are gone you may as well buy another pivot. I haven't found a source for those small parts.
Let me know how and when you are ready to proceed.