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Dynamo not charging [BT7] - replace brushes or buy new?

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Hi all
Collected refurbished 1955 C45 Dynamo to replace the original 1960 C45 which was exchanged. All buttoned up and 14.75v at the battery with the Ignition Light now extinguishing. Cannot recommend the Burghclere Starter and Alternator Center highly enough (Close to Reading in Berkshire, UK - https://www.burghfieldstarterandalternatorcentre.co.uk/).
Happy Xmas.
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Phil
 
Good going Phil. Enjoy & Merry Christmas.
 
fishyboy said:
Hi Bob,
Ah I see what you mean. I had forgotten about the about the current needed to energize the dynamo so I can see how a fault control box could cause a problem. I'll do some more checks tomorrow. I have now found a shop nearby that rebuilds these C42 dynamo. I can take over both the control box and the dynamo and he will bench test both together, which might just be the best solution for me.

I'll double check the system voltage test at 1500rpm tomorrow. I did run at around 1500rpm and the ignition light didn't go out.
Thanks again.
Phil
Click to expand...
Did you try to “flash the field”?
 
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