d17 neg groung
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=136468
Printed Date: 08 Nov 2025 at 5:09am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: d17 neg groung
Posted By: mattb
Subject: d17 neg groung
Date Posted: 21 Mar 2017 at 8:06pm
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Im wanting to hook the generator on my series 1 d17 for neg ground my voltage regulator says pos or neg round. What all wiring to i have to change? Reason is its a diesel and have to use factory gen for power steering
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Replies:
Posted By: DSeries4
Date Posted: 21 Mar 2017 at 8:36pm
The factory generator will work for both positive and negative ground. Just need to change around some wires in the wiring harness - switch the battery cables and wires on back of the ammeter. Once that is done, flash the generator by shorting the BAT and GEN terminals on the regulator. A few more wires to switch around on gassers but nothing really hard. I have all of mine switched to negative ground on original generators.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Posted By: mattb
Date Posted: 22 Mar 2017 at 3:37pm
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ok thanks....do I flash it with it running or engine off?
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Posted By: wbecker
Date Posted: 22 Mar 2017 at 3:40pm
Off.
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Allis B, IB, Low B, G, D10, JD M, 8KCAB, C152
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Posted By: Gerald J.
Date Posted: 22 Mar 2017 at 4:06pm
Absolutely flash before starting the tractor after changing the battery polarity. If you start it without flashing the generator will build with the old polarity and likely fry the voltage regulator when it's cut out closes with the battery and generator of opposite polarities. Worse than a short on the battery and the generator.
Gerald J.
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