If your machine has been standing without protection from rain and moisture over an extended period, it is likely the grease that this item was packed with has been washed away. This will have led to pitting of the cone, the bearings and probably this race as well.
It would be sensible to replace the complete assembly, and ensure your steering is free of play and at the same time not too tight and stiff to the point where the handling is adversely affected.
Renew all the parts in the head-stock assembly for a safer outcome. Add as many items as you wish to your shopping cart and pay just one fixed price shipping cost.