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Switching generator to alternator

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=212296
Printed Date: 20 Sep 2026 at 8:45pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: Switching generator to alternator
Posted By: keithpearson
Subject: Switching generator to alternator
Date Posted: 20 Sep 2026 at 4:14pm
I'm in the process of switching my D17 series 4 over to an alternator. The alternator that I have is too big to fit inside the cowling. What alternator do you guys recommend to use to fit inside cowling without having to cut it up to get the alternator to fit

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WD45,160 6040,D14,D15,D17,D19,D21,and still looking for more



Replies:
Posted By: steve(ill)
Date Posted: 20 Sep 2026 at 5:01pm
The old standard is the DELCO 10SI with internal regulator..

If you want one about 2/3 that size, you get the DENSO type, or "chevy mini".... prices range from $75. up to about $150. .. many of these are ONE WIRE, meaning there is no spade connector plug needed, just power cable to the battery ............ this is on ebay... everyone sells these.




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Like them all, but love the "B"s.


Posted By: steve(ill)
Date Posted: 20 Sep 2026 at 7:23pm
25 years ago i started upgrading a few tractors with an alternator... At that time, DELCO 10SI was the standard... but was being replaced with the NEW CS130 which was smaller.. I have several of those in service... Thats another option..... these normally have a spade connector fittin on the side.. Two terminals are use, on gets 12v, the other gets a 12v SIGNAL to start the charge, similar to wiring up the older  10 SI.
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The https://www.google.com/search?ibp=oshop&prds=pvt:hg,pvo:48,imageDocid:5815508974891571766,headlineOfferDocid:6168218020248584186,productDocid:6168218020248584186&q=product&sa=X&ved=2ahUKEwjUzcuwsv6WAxVOhIkEHTwaPZ4Qxa4PegYIAggmEAY" rel="nofollow - compact, high-output internal-regulator alternator used heavily by General Motors from 1986 through the mid-1990s


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Like them all, but love the "B"s.



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