01-06-2020, 09:15 PM
(01-06-2020, 04:12 PM)Jamie Wrote: I hope that someone can help. I have dismantled my Ruby's dynamo to overhaul it and fit new brushes. It has not been in use for a long time and the terminal block on the outside is missing, meaning that the wires have been free to flap about. One of them was very wobbly when I got it and it has now fallen off.
I am left with one wire which runs comes outside of the body and has red insulation and another with black insulation which remains inside the body. The wire which fell off is quite thick, has black insulation and which ran out of the body, along with the red wire. There is 1 ohm resistance between the two remaining wires and no connection to earth from either. I have tried to remove the large screws which retain the coils, but to no avail.
Is there anything which I can realistically do to repair this or is time to look for a replacement? I plan on converting to 12 volts, if that makes ny difference.
Regards,
Jamie.
I fitted 12 volt, higher resistance, field coils into my 1934 dynamo.
If you look for a replacement it might be no better than what you have already. What is the present armature like?
As for the two screws holding the field coils in... With the dynamo casing in a vice, hit the screws direct with a hammer. Point a blowlamp at the screw for a while. Then use a blunt centre punch and a medium sizes hammer to tap the screw around. They will come loose!