On my J2, I originally had only a 6 volt dynamo. I brought it in to a
Lucas service shop to have them convert it to 12 volts. They replaced
(rewound?) the armature and replaced the field coils. Voila! A 12 volt
dynamo. No other parts were changed.
P.S. Anyone have a spare 12 volt armature for a MMM starter?
[mailto:firstname.lastname@example.org] On Behalf Of
Sent: Friday, March 28, 2003 8:45 PM
To: email@example.com; firstname.lastname@example.org
Subject: Dynamos 6/12volt
Question regarding dynamos and compatibility of using either 6 volt or,
volt armatures. I realise that the field windings on a 6 or,12v dynamo
However, I have a complete 6 volt MMM MG dynamo and a 12 volt armature
same physical size and key way locations.
Would these be interchangeable between either 6 or 12 volt units? I'm
presuming that they would be but wouldn't prefer to take the risk
more knowledgeable advise.
If they are wound differently, what is the test to establish their
I'm not referring to a growler test for continuity.
All other features of the Lucas dynamo are the same as the 12 volt unit.
Including the third brush.
All responses appreciated. Thanks.
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