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Farmall & IHC Tractors Discussion Board

Re: Putting an Alternator on a Farmall M


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Posted by Janicholson on June 10, 2011 at 21:09:10 from (67.72.98.45):

In Reply to: Putting an Alternator on a Farmall M posted by truckerlary on June 10, 2011 at 14:54:46:

The information in these will make it simple.
There is one with an alternator. The light should be a bulb found in idiot lights, or side clearance lights (not LED) a 10 Ohm resistor can be used, or a diode with the marked band end towards the alternator.
The power for the excite current comes from the ignition. (let us know if it has a mag, it is a bit different)
The #1 terminal connects to the light-Diode- or resistor such that it is in the circuit, not grounded. The light (and the other options) would have one lead connected to the alt #1 terminal, and the other lead connected to the ignition switch where the coil connects.
The coil needs to be new (12 volt for use with no resistor, or have a ballast resistor used to lower the voltage if using the original. One from a mid 60s chevrolet, ot chrysler work well.
This resistor is placed between the coil and the ignition switch.
The coil needs its Negative small terminal connected to the distributor lead. (reversed from original positive ground)
The amp gauge needs to be reversed by switching all wires from one side to the other to show charge when the battery polarity is changed.
The light bulbs need to be 12 volt.
Jim



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