wiring

I think if I do this the regulator determines the charge to the switch rather than sending the charge directly to the switch and letting the Field resistance wire control the voltage to the switch.

If there is a good drawing out there that shows the wiring on this tractor using a voltage regulator and the original 3 position switch that would be great.

Thanks in advance.

". . . and then run a wire from the L connection on the regulator to the Field resistance connection on the switch . . . ."

THE ANSWER IS NOOOOO OOOOO OOOOO

You no longer use the switch terminal that used to wire to the gennys Field post.... The VR's L terminal is to feed hot battery voltage to loads (via the switch) like lights n ignition (if a coil ignition) instead of them being fed from the ammeters Load (NOT battery/starter) terminal as they were before

Heres the correct way to wire that 4 terminal Voltage Regulator

BAT wires up to the Load (NOT battery/starter) side of the ammeter. That would be the same terminal (and wire) that wired to the BAT side of a Cutout Relay and also supplied hot battery voltage to lights n ignition. With the VR and its L terminal it now feeds them instead, so remove any wire from the ammeters load terminal to the switch and wire the switch instead to L on the VR.

ARM/GEN on VR wires to gennys ARM post FLD on VR wires to gennys FLD post L on VR wires to BAT input terminal on switch (instead of it wiring to the ammeter)

NOTE on many 4 terminal VR's the termiunal off on one side or the bottom all by itself is the ARM/GEN terminal and the 3 side by side are BAT FLD LOAD

NOTE it will still work if loads are kept on the ammeter (same terminal that wires to BAT on VR) and the L terminal isnt even used, but I would use the L terminal

AGAIN DO NOTTTTT TTT WIRE THE VR'S L TERMINAL TO THE LIGHT SWITCH

If its an older 3 brush genny you may want to adjust its third brush to the max charge position if youre converting to a VR instead of the old relay n light switch system.

Id Polarize the genny before you fire her up

John T

right now according to the schmatic I have the Field Pole on the generator goes to the field resistance connection on the 3 position switch for the lights. If I remove that wire from the equation and use the L connection on the VR would not the wire end up in the same place on the switch? I am by no means competent when it comes to wiring but I do not see any other place on the switch that the wire could go.

I have a mag so I am just using a single pole cut off switch for tuning off the tractor once it is running.

Sorry for sounding like an idiot but you know what you are doing and I am just having a little difficulty following the L connection from the VR to the 3 position switch.

Thanks again for the help. I am ready to hear her turn over.

Using a VR for field current controll is MUCH superior.

I would connect the gennies field pole to the VR field tab. Gennies armature to the GEN/arm tab on the VR, and then that leaves ground which is obvious ( if you have a 4 tab vr ).. and charge line out to the ammeter.. etc.

If i remember correctly, that genny is A-Circuit, meaning it's field is internally hot, and the field terminal is looking for ground. make sure you have the correct / compatible regulator.. etc.

Soundguy