Farm Equipment - d-17 electrical ?

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d-17 electrical ?

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=44888
Printed Date: 06 Oct 2025 at 8:58pm
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Topic: d-17 electrical ?

Posted By: tony
Subject: d-17 electrical ?
Date Posted: 02 Feb 2012 at 3:17pm

I have a D-17 w/12V + ground system that I want to change to - ground. I see by other posts on this forum that I can get the gen to charge either way by just re-polarizing the gen. How do I do that?

I also know I have to do the following:

Switch wires around on Coil,Headlites,Amp gauge and of course the battery.

Did I miss anything?

Thanks

Replies:

Posted By: Ted in NE-OH
Date Posted: 02 Feb 2012 at 3:32pm

Headlights don't care about polatity so no change is needed.

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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914

Posted By: Gatz in NE
Date Posted: 02 Feb 2012 at 5:40pm

will the voltage regulator work as is ? or does changing the polarity not matter to it?

Posted By: Ky.Allis
Date Posted: 02 Feb 2012 at 5:47pm

Just curious why you want to change it to neg. ground. I just finished complete rewire of my D-17 and could have changed it like you are wanting to do,but I figure it has worked fine for 49 years so why change now. Good luck with your project !!!!

Posted By: tony
Date Posted: 03 Feb 2012 at 5:54pm

I want to go to neg ground so I can put a radio on it- helps make a long day on the tractor just a bit shorter. ;-) Plus I'll be able to put the control box for the round baler on it if my main baler tractor goes down for any reason.

Posted By: Chalmersbob
Date Posted: 03 Feb 2012 at 10:05pm

You have to look at the back of your voltage regulator to see if it is polarity sensitive.

Some will work Pos or Neg, and other only 1 way. Bob