Allis Chalmers B Wiring Diagram

rhr1950

New User
Does anyone have a wiring diagram for a 12 volt conversion on a tractor with distributor instead of magneto?
 
<a href="http://s436.photobucket.com/albums/qq86/steve-ill/?action=view&amp;current=alternator-coilWireing-1.jpg" target="_blank">
alternator-coilWireing-1.jpg" border="0" alt="alternator- coil, 12 volt alternator 10si
</a>
 
tha above assumes you are installing a DELCO 10SI alternator as your 12 v retrofit. The 10 ohm resistor is to cut backfeed from the alternator, and also drops voltage slightly so alternator will kick in and start charging. I have used this drawing on several tractors. I also like to install a FORD starter solenoid and a push button and clamp the factory switch on the starter "DOWN" so it is always engaged, and let the solenoid do the work.
 
If you need a resistor on the coil depends on if you get a new 12 volt coil that needs no resistor, or if you use the old 6 volt coil that does need the resistor.
 
That 10 ohm/10watt resister can also be a simple light bulb or diode. I have tractors wire up all those ways and have done many others with a few out ways to excite the alternator
 

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