12v ?

[mapaduke@yahoo.com]

going to start my 440 project soon and its whirring is a mes and missing a generator.i have a one wire delco alternator.is the engine rotation different?
i think i need a rezister so i don't burn up the points.dos any one know witch one to use.im just thinking of the best way to go. i do want to work this crawler.
maby i will keep it 6v if i can find a good gen.

[Lavoy]

Use a Chrysler ballast resistor, don't know a part number, but readily available.
Rotation is correct, no problem there.
Lavoy

[Willyr]

Alternators only like negative ground. Trying otherwise and you will fry the tree (diodes in the back). Balast resistor for the feed to the coil brings it down to 9 volt only, still hot for 6 volt points, may cycle alot of those points. GM makes 12 volt points that fit? Dont know if rated for 12 volt tho. A Volkswagen Beetle coil is rated at true 12 volt (no resistor needed). Just remember your lights will need to be changed.

[Lavoy]

Points don't have a voltage rating, all 12 volt systems use some sort of resistor to bring the voltage down once the engine has been started. Chrysler uses an external resistor, GM uses the resistance in the solenoid to do the same thing, Deere did this as well with the 1010's.
A ballast resistor should get you down to 6 volts or below once they are warm.
Lavoy

[H-D]

Lavoy, GM used the contact in the solenoid to bypass the ignition resistor while cranking; the resistor was first a ceramic block type, later replaced with the requisite length of Ni-Chrome wire. The resistance figure I recall was 1.8 ohms.

[JD440ICD2006]

Everybody is different which keeps things interesting.
I like to have them as original as possible. Many generators can be repaired for about $10.00 (new brushes) and some cleaning. You can buy almost any part that you need for them. The correct voltage regulators are still available and less than $40.
The wiring is pretty simple and straight forward on a 440 IC. JD 440IC Service Manual - Page 80-20-4 gives the entire wiring diagram with complete explainations of what is what.
Or, you can antiup and buy a pre made wiring harness. I prefer to build my own for several reasons, price being the main one.
If you want to convert to 12 volts, you can still have a generator that looks original. They can be converted to 12 volts. I did this on my 440IC and a 730 Diesel with pony start. Both work great and still look like "factory" charging systems.
Have fun with how ever you decide to do it.