12 volt

taba · May 3, 2009

How can you tell if a c or h or m has been changed to 12 volt

Bob Kerr · May 3, 2009

If the battery is in it 6 volt batterys have 3 caps on top. If battery is gone, take the Voltage regulator off and look on the back and see if it is stamped 6V or 12V and also look if it is marked neg ground or pos ground. Your tractor originally was 6v Pos ground.

CNKS · May 3, 2009

Other ways: If the generator still has the tag, the Delco 12 volt generators (C,H,M were never 12V from factory) have red tags, 6 volt black tags -- not foolproof because a 6V can be converted to 12V. If it has an alternator it is likely 12 volt, 6V alternators are not common, but they do exist.

taba · May 4, 2009

thanks. It has an alternator

Janicholson · May 4, 2009

If alternator, it is likely 12v neg ground. HHooowww EEVVEERR they make 6 volt alternators, in both ground polarities, and 12v in both polarities. do not connect an alternator to the wrong polarity, it will fry instantly. Use a test light and a charged bqattery to check.
Disconnect the alternator from all wires, but have it grounded (Installed).
Hook up the battery negative ground. Use a test light between the Battery terminal (big) on the alt, and the ALT wire that should go there (assumes it is connected to the amp meter and the amp meter is good, and the amp meter is connected to the battery side of the starter switch). If it does not light, all is well, neg ground. If it does light, the alt is possibly pos ground, or has burnt/shorted output diode bridge. Take it inb for testing. JimN

12 volt

taba

Member

Bob Kerr

Member

CNKS

Well-known Member

taba

Member

Janicholson

Well-known Member

Similar threads