Definitely want to check the fields and armatures with a megger. Make sure those fuses are time delay or motor rated. That’s a pretty big discrepancy on the generator shunt field from the print. You could try wiring the field in series and re-setup the box. Then you’d be 30 ohms though. If you could still get rated motor armature voltage you should be good but may have to go back to parallel if you can’t. There’s a point in the setup instructions where you have the motor brushes lifted and get the armature voltage to nameplate with the high speed input jumped. If it still blew the fuses the. you could eliminate the motor. Might also try lifting gen shunt field so it doesn’t get to the generator and getting to high speed output again. If they still blow it’s not the generator either.
Check resistors R1-R6 too.
