As per my previous post, provided the drive belt is a link type, you can remove the whole of the motorising assembly as a single unit.
Remove belt guards 90 & 91
The unit is then only attached by some screws, 63, and a stud 64, which is helpfully located in a slot rather than a hole.
As I recall, the left hand vertical pair, through the green holes, are fiddly to access, needing a long ¼” drive.
Hex Allen screw replacements might be easier.
