861 Wiring question

Good evening, first time posting. I have searched and read till my eyes have crossed. I have a few questions about the wiring for a 12vdc system
I have a 57/58 861, the man I got it from had done a conversion to 12V. All the wiring was a mess. I took the tractor completely down and have painted it and now Im putting it back together. Its been a project for myself and youngest son, 20.
It has the 3 wire Alternator, 6v coil, resistor, 2 position key switch and a starter push button on the dash. I have elimated the push button on the dash and installed the OEM safety starter button. I am also eliminating the 6v coil. The wiring diagram Im using came from here labeled K. LaRue.
1st question is: If I replace the coil with an internal resistor I should not need the in line resistor,correct?
2nd Question: The starter will continue to turn over even with the key is switched off. Is this the way its suppose to be. I realize the way its shown, its just turning the power on/off to the coil.
3rd question: On the 4 post solenoid, you got the battery lug on one side, the starter lug on the opposite, and two smaller ones in between. One of the small lugs goes to the starter push button switch, nothing is shown for the other lug. Do I run a wire from it to the battery?
4th question: Im not using an amp meter, do I just connect the hot wire that goes to the meter to one side of the ignition switch?

Thank you for any help. Scott

1st question is: If I replace the coil with an internal resistor I should not need the in line resistor,correct?

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If the new coil says "12 volts no resistor required", then you are correct, you do not need an external resistor.

2nd Question: The starter will continue to turn over even with the key is switched off. Is this the way its suppose to be. I realize the way its shown, its just turning the power on/off to the coil.

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The starter switch (push button or neutral safety switch) simply completes the path to ground. The starter circuit and solenoid were always hot on early models. They did switch to a setup where the primary of the solenoid was switched off by the key but I'm not sure exactly when that change happened.

3rd question: On the 4 post solenoid, you got the battery lug on one side, the starter lug on the opposite, and two smaller ones in between. One of the small lugs goes to the starter push button switch, nothing is shown for the other lug. Do I run a wire from it to the battery?

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There are many different 4 post solenoids with different internal configurations. If you don't have the second small post connected to anything and the starter button will turn the starter then it does not need to be connected to anything.

4th question: Im not using an amp meter, do I just connect the hot wire that goes to the meter to one side of the ignition switch?

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I assume that means that you're using a voltage meter instead? If so, then yes, you can connect the meter to any spot that is hot when the key is on and gets switched off when the key is off and the other side of the meter gets grounded. If there is only one connector on the meter then the case does the grounding. If you mean that it wasn't using an amp meter previously and you want to start using one now, then the amp meter has to be connected in-line between the battery and a spot that is common to both the alternator and the load so you will see the net current drain/charge to the battery.

Thanks, do I still need the 50V diode in line with the alternator wire. Thank you

(quoted from post at 14:31:52 09/09/20) Thanks, do I still need the 50V diode in line with the alternator wire. Thank you

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ou still need diode in Excite wire to #1 terminal of alternator(diode goes where warning light is shown in this diagram) . Without seeing your diagram, I do remember that some K. LaRue'e diagram labeled for the X01 series tractors is actually for the X00 tractors, thus the solenoid wiring differences.

Thank you. This is the wiring diagram that I need, this helps a lot and answers more questions. Yes the one I have, there is a solenoid difference And a couple of others. Thanks for this again and the help.