Farm Equipment - D19 polarity

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D19 polarity

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=159275
Printed Date: 18 Sep 2025 at 12:46am
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Topic: D19 polarity

Posted By: SD Allis
Subject: D19 polarity
Date Posted: 22 Mar 2019 at 6:21pm

Did the D19 gas originally come with a six volt system? If so then it would be a positive ground. Am I correct in making that assumption? Also has anyone ever experienced problems with the fuel pump on these tractors!

Replies:

Posted By: DrAllis
Date Posted: 22 Mar 2019 at 6:29pm

Any A-C with a generator (from the Factory) was a POSITIVE ground. Makes no difference 6 volts or 12 volts. All D-19's were 12 volts. Fuel pumps go bad and I don't know if any parts are available from AGCO. Pretty sure it's an AC Delco pump.

Posted By: SD Allis
Date Posted: 22 Mar 2019 at 6:46pm

Thx

Posted By: Gary Burnett
Date Posted: 22 Mar 2019 at 9:02pm

12 V pos ground and if you find a reasonable priced replacement pump please let me

know about I never could so I now have an electric pump on my D19.Think there was one available I found for $300+.