Farm Equipment - Polarizing generator

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Polarizing generator

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=179314
Printed Date: 15 Aug 2025 at 9:46am
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Topic: Polarizing generator

Posted By: Ryan Renko
Subject: Polarizing generator
Date Posted: 24 Mar 2021 at 8:22pm

I know this has been asked a thousand times but I want to hear it again. I have a D17 IV and need to know the proper way to polarize the generator. I Googled it and thought I better ask the pros. Thanks in advance!! Ryan

Replies:

Posted By: Leadoff
Date Posted: 24 Mar 2021 at 8:37pm

Ryan

Make yourself a short (12 inches should be enough) jumper wire, expose conductor at both ends, tractor not running, battery connected, generator connected to Voltage Regulator as per D17 wiring diagram

Go to the Voltage Regulator, and briefly strike the jumper between the BATT and GEN terminals on the Voltage regulator. You should see a spark

Now you can start the tractor and the Generator is polarized

You should polarize very time you disconnect any of the components in the charging loop

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1963 D17D Series III. 1965 D15 Series II. 1965 D17 Series IV. 1975 185. 1978 716H. 1979 716H. 1965 780 Harvester/1R&DC. 1957 Model 73 SC 4 Furrow Plow