Farm Equipment - Allis Chalmers B 12 volt conversion

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Allis Chalmers B 12 volt conversion

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=140887
Printed Date: 31 Dec 2025 at 12:29pm
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Topic: Allis Chalmers B 12 volt conversion

Posted By: Billy Ray
Subject: Allis Chalmers B 12 volt conversion
Date 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.

Replies:

Posted By: DougS
Date 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.

Posted By: Gary
Date 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" rel="nofollow - http://dueyschutter.freeservers.com/cgi-bin/i/images/1_distributor_key_solenoid_start_6_to_12.jpg