At last working dynamo

[Bob Culver]

if no one springs a correct cover could try a sealed bearing, drill holes jsut beyond ends of cracks, devise a longer tie rod, and put a plate at the cracked end.
Curiously on these dynos the main brushes are at right angles . The 3rd brush is located relative to two phantom other main brushes. Hopefully the main brushes were in optimum postion and this can be determined again, not thast anyone ever worries about it..