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Allis Chalmers Discussion Forum
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Re: Allis chalmers C generator wiring

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Author  [Modern View]

01-07-2014 09:43:06

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First thing I would do is check battery voltage with it not running then check it with it running. Not running you should have around 6.3 volts and with it running around 7 or so volts

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Darrell Hopper

01-07-2014 12:59:05

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 Re: Allis chalmers C generator wiring in reply to old, 01-07-2014 09:43:06  
After I posted my questions,I removed and disasembled the generator. The generator is fried. I assume that when the lights and switch was removed that there wasn't any voltage control and that must have burnt up the generator.

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01-07-2014 16:20:58

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 Re: Allis chalmers C generator wiring in reply to Darrell Hopper, 01-07-2014 12:59:05  
The light switch puts a resistor in series with the "F" wire to ground. When the lights are on, it bypasses the resistor and grounds the "F" directly. Grounding the "F" wire is a test to see if the generator is working. You dont need the higher charge all the time. IF you take the light switch out of service, you can add a big resistor on the "F" wire to ground so you get a constant 2-3 amp charge. I think its 3 OHMS, but no guarantee without looking it up.

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01-07-2014 16:23:25

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 Re: Allis chalmers C generator wiring in reply to steve(ill), 01-07-2014 16:20:58  
The cutout should be open when not in service. When the generator is running and putting out voltage above the battery, the cutout closes and current flows to the battery. If the battery flows backward when off, the cutout is bad.

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