This may be for the mechanics forum but I'll start here. I was riding my fixie and was slowing down quickly when I felt the rear cog slip. I thought, no big deal, the lock ring is loose and needs tightening. I check the hub and the non-drive side dust cap is skewed but still in the shell and there was of course play in the hub.

I walked it home, replaced the bearings, tapped the dust cap into place and tightened the lock ring. Anything else I can do? Will the dust cap come loose again?

If it matters, the hubs are Racelite high flange hubs. Age is unknown, Sammyboy may know if he reads this.