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Allis Chalmers Discussion Forum
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Model B wiring without lights

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Steve Jelf

09-07-2004 21:13:02




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It doesn't appear that my 1945 Model B was ever equipped with lights. Where can I get a wiring diagram that shows correct wiring without lights? The diagram in the AC manual shows wiring that includes the light switch which also regulates the charging rate. Without the switch, where does the generator field wire go? A previous owner improvised a setup that has the generator disconnected, so I want to get the thing back in shape to charge.

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steve(ill)

09-08-2004 18:42:33




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 Re: Model B wiring without lights in reply to Steve Jelf, 09-07-2004 21:13:02  
with the "F" wire grounded to the frame you will get about 8 amp charge all the time. with the 3 ohm resistor on the light switch in the "F" line before ground you will get about 3 amp charge.--- you could buy a 3 ohm resistor---- you could connecte a toggle switch to F and turn it on to ground the wire for 30 minutes each time you run the tractor--- or you could connect to ground and leave it there if you run just an hour every week. constant operation hour anfter hour may overcharge the battery. --- as mentioned, you need the cutout to "open" the "A" wire feeding teh ampmeter, or just install a 6 volt regulator and it takes care of the cutout and the resistor problems.

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Phil Auten (TX)

09-08-2004 05:24:30




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 Re: Model B wiring without lights in reply to Steve Jelf, 09-07-2004 21:13:02  
Check the link for wiring diagrams of all types of circuits with and without lights. The charging switch (light switch) regulates the charge rate in place of a voltage regulator and is designed to work with a cutout. Choose a diagram that works with a voltage regulator and the charging switch is no longer necessary.
If you don't care about originality, an alternator is by far the easiest and most reliable way to set up your system.

Phil

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