[Mg-mmm] P-Type Dynamo.

[jay at ukhistoric.com]

Now that this message finally posted(server down?), there is an update...

Got it all back together on the bench.  Applied 12V to field only, then
connected field and armature to 12V.  The dynamo "motored" along pretty
quickly!  I'm hoping that's a good sign.

Unit is back on the car and I hope to run it this weekend.

Jason.

> Back working on the dynamo.  Received the new brush set and installed
> after cleaning up the unit.  I did not yet open up the unit, though.
>
> I have a few questions on the positions and connections of the brushes:
>
> 1) Is the 3rd brush, the thin one, opposite from one of the large
> brushes??
> 2) Is the 3rd brush supposed to be connected to the field coils which is
> then connected to the smaller external connection on the body?
> 3) One of the large brushes is connected to ground, the other is connected
> to the large external connection.  Is this correct??
> 4) Large brushes are about 90 degrees apart.  Correct??
> 5) The commutator seems to be in good shape, but I have not checked
> resistances between "slices".  Should I be measuring adjacent, opposite,
> or others??
>
> There does not seem to be any shorts or "opens" between connections
> externally and internally.  I need to recheck resistances - one
> measurement is 7 ohms, the other around 225 ohms.
>
> I've found various docs online, but none seem to match my current internal
> configuration.
>
> Thanks!
> Jason.
> P1237.