Posted by John T on February 08, 2011 at 19:18:56 from (66.87.1.132):
In Reply to: IH 424 Generator posted by RLH_IH on February 08, 2011 at 18:16:42:
If youre using an internally regulated Alternator, or any alternator for that matter, YOU DO NOT USE THE OLD DC GENERATORS VOLTAGE REGULATOR. It was for regulating the charge of the old DC genny NOT an alternator.
The alternators output basically wires to where the BAT terminal wired on the old VR system, i.e. it leads up to the Load (NOT battery/starter) side of the ammeter. However, when I convert from a 20 amp genny to a 30 or more amp alternator I replace that old wire (Alternators output up to ammeter) with a new 8 or 10 Gauge wire and likewise the same from the other Supply side of the ammeter to where it connects to the big battery cable, often at starter switch or solenoid.
Since youre staying at neg ground you dont have to reverse ammeter or coil leads, and if youre staying at 12 volts you dont need to worry about ballast resistor additions or coil swaps either.
Just wire the alternators big main output up to the ammeter and discard the old Gennys VR.
You do have to wire the alternators excitation circuit and use a resistor or idiot light or diode etc to prevent the tractor from running on if the ignition is turned off as necessary, but theres already a ton of those diagrams and pictures out there
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