[AJD] Stupid questions 6v vs 12v B

[John Nordhoff]

If it has a 12 volt battery, it must have been converted to 12 volts (hopefully the charging system was upgraded). If so and the old 6 volt coil was retained, the external series voltage dropping (12 to 6) Ballast Resistor is required so the coil doesn't draw excess current and overheat.


John T


________________________________
From: antique-johndeere-bounces at lists.antique-tractor.com <antique-johndeere-bounces at lists.antique-tractor.com> on behalf of Paul Sawyer <mustangpaul at gmail.com>
Sent: Tuesday, July 19, 2016 8:55 PM
To: antique-johndeere at lists.antique-tractor.com
Subject: [AJD] Stupid questions 6v vs 12v B

Ok y'all. I have some stupid questions.

How do you tell if a tractor has been changed to 12v?  The people who did the work on the tractor aren't here anymore so I can't ask. It has a 12v battery but a 6v JD coil. I can't see anything on the alternator/generator as it is heavily painted. There is a white ballast above the coil. That cuts voltage, correct?

The tractor is a 51 B.

Help!

If it isn't 12v, I want to move it there.

-Paul

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