Should there be some form of cover over the hub centre where the axle protrudes? It seems unfinished as it is - and there seems to be marks on the hub cover as though something was there?
Also - how is the hub cover removed?
Looks the same as my B40. Also parts book doesn't show any small hub cover.
Large hub cover is a tight fit to hub large diameter and has three tabs that are bent to retain it.
Colin