Farm Equipment - d17 alternator

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d17 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=34728
Printed Date: 10 Sep 2025 at 4:30pm
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Topic: d17 alternator

Posted By: vyvyjim
Subject: d17 alternator
Date Posted: 30 Jul 2011 at 4:16pm

I'm having charging problems on my series IV D17.

Should I see if I can get the generator fixed or put an alternator on?

If the answer is an alternator, which one and does the positive ground system make a difference as to the alternator?

Replies:

Posted By: CTuckerNWIL
Date Posted: 30 Jul 2011 at 4:23pm

If your wiring is up to par, the simplest thing to do would be repair the generator. Many times a good cleaning and replacing the brushes and maybe a bearing and it's good as new.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF

Posted By: Bill Deppe/AC Salvag
Date Posted: 30 Jul 2011 at 9:57pm

From experience, the new regulators aren't the quality they used to be. My local generator repair shop worked with me and we've developed a transisor and diode setup and mounted it into the original regulator. This has really worked great so far, smoother regulator control and still looks original

Posted By: Jeff Z. NY
Date Posted: 30 Jul 2011 at 10:53pm

Yes the ground does make a difference. If you don't want to switch to - ground you can get a + ground alternator.

Posted By: DSeries4
Date Posted: 31 Jul 2011 at 9:29am

I vote for fixing the generator.

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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