Allis Chalmers B 12 volt conversion

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   I have purchased a 1939 Model B which had been converted to a 12 volt alternator and a solenoid controlled starter.  Having found a couple of obvious wiring mistakes causing a lot of trouble starting the tractor, I started trying to straighten it out.  Had the starter checked at a good shop, cleaned all connections, made new battery cables (old ones were really a mess), and want to put on an ammeter and key switch rather than the little twist starter button that is on it now.  What I really need now is good directions or even a diagram to help me with the correct wiring using a single wire alternator and a solenoid.  Any help will be greatly appreciated.

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Billy Ray Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 09 Dec 2009 Location: Kinard, Florida Points: 85	Post Options Post Reply Quote Billy Ray Report Post Thanks(0) Quote Reply Topic: Allis Chalmers B 12 volt conversion Posted: 28 Jul 2017 at 10:37pm
	I have purchased a 1939 Model B which had been converted to a 12 volt alternator and a solenoid controlled starter. Having found a couple of obvious wiring mistakes causing a lot of trouble starting the tractor, I started trying to straighten it out. Had the starter checked at a good shop, cleaned all connections, made new battery cables (old ones were really a mess), and want to put on an ammeter and key switch rather than the little twist starter button that is on it now. What I really need now is good directions or even a diagram to help me with the correct wiring using a single wire alternator and a solenoid. Any help will be greatly appreciated.

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DougS Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 03 Nov 2011 Location: Iowa Points: 2490	Post Options Post Reply Quote DougS Report Post Thanks(0) Quote Reply Posted: 29 Jul 2017 at 4:03am
	You don't want to run the ammeter through a key switch. Most key switches are not rated for that kind of current.

Gary Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 13 Sep 2009 Location: Peterborough,On Points: 5910	Post Options Post Reply Quote Gary Report Post Thanks(0) Quote Reply Posted: 29 Jul 2017 at 4:04am
	Here is a link to Duey Shutter's website. He has various sketches for 6 to 12 volt conversions. Gary http://dueyschutter.freeservers.com/cgi-bin/i/images/1_distributor_key_solenoid_start_6_to_12.jpg