Re: 6 volt systems

Posted by John C. on February 25, 1999 at 10:43:50:

In Reply to: 6 volt systems posted by Chris Jones on February 24, 1999 at 18:35:13:

One of the first things I did to my Farmall B was to get the electrical system working. If your generator has a voltage regulator, and the tractor has been wired for the regulator, your high and low settings on the light switch are the same. If you are running with a "low voltage cutout" and correct wiring for the cutout, a resistor on the light switch is brought into the circuit to hold back the charging rate. At the highest position on the light switch, the resistor is taken out of the circuit and you get the full charging rate of the generator. The voltage regulator has a low voltage cutout relay as well as 2 relays to limit high voltage and high charging rate, so the resistor isn't needed.

15 amps is about right for two headlights and a tail light. My ammeter will show a charge with the lights on until I drop to about 1/3 to 1/2 throttle, then the low voltage relay on the regulator cuts the generator out of the circuit. One last note: The light switch case must be well grounded to the tractor frame for the charging circuit to work. I finally ran a 10 gage ground wire from the switch to chassis ground and most of my (charging) problems went away.

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