Hello Teds01
My best guess is that there should be a grub screw and key-way
to secure the motor/engines.

However, I think the sleeve is integral to the output shaft
[it cannot be removed]

[Linked Image]

Hope this helps.
--------------------------------
Jack

Attachments
Scan 104.jpg (21.25 KB, 77 downloads)
Last edited by CyberJack; 23/01/22 10:55 AM.