First time servicing a rear hub for me.
I disassembled and cleaned my Shimano FH-M510 rear hub, removing the nut, washers and cone only from the left side of the axle. When I went to insert new bearings and grease I noticed a silver ring, and I don't understand where I have to put it (you can see it near the old freehub body).
Did I put that ring with axle's parts by mistake? I just remember to have cleaned it from grease.
Maybe it's the left side dust cover:
Can someone help me?