Morris Minor Owners Club

Dynamo has now had pulley removed, ahead of receiving my newly eBay bought "hub pullers" (they arrived a few hours
after doing the job the BMCeccose suggested way)
Thanks BMC - after letting the Eezox solution soak in over-night, I heated up (one of your favourite options)
the pulley flange and, using the suggested tyre levers (bicycle ones), it came off very easily.
I then had problems in deciding how to get the Woodruff key out.
In the end I didn't as I noticed an enormous amount of crud around the front bearing. Crud removed, sprayed with WD40
and, guess what?, the bearing runs very well now!
I've now introduced engine oil into the race, put the Dynamo back together again and, as a motor fed from
a battery, it runs "as sweet as a nut" a phrase a 1970's used car salesman, I knew, used to use (often).
Now I'm going to have to wait until I've put the engine back together again to test the charging system.

Well at least it runs - not sure if engine oil is going to last long in there though. I would try to rub in a bit of grease.

If the meter you were using has a resistance setting, the resistance across the armature (D) to earth and the resistance across the field windings (F) to earth should both read about 2·4 ohms. If the dynamo is running OK as a motor you should have a working dynamo.