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possitive or negative ground

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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=29009
Printed Date: 26 Jun 2024 at 12:50am
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Topic: possitive or negative ground
Posted By: Sitesstables
Subject: possitive or negative ground
Date Posted: 12 Apr 2011 at 4:02pm
OK i am having the generator checked today and new wires made to go from generator to the regulator. Here is my question The wireing diagram shows a positive ground.. but the guy who had the D17 Series IV before me just hooked it up as negative ground.. So it this and issue or is it ok. When I poloize the the system will that work. Or does it need to be postive ground?

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1965 D17 Series IV



Replies:
Posted By: Rfdeere
Date Posted: 12 Apr 2011 at 6:32pm
   Is it 6 or 12 volt ?

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Randy Freshour,Member Indiana AC Partners,
http://www.rumelyallis.com" rel="nofollow - http://www.rumelyallis.com


Posted By: Brian Jasper co. Ia
Date Posted: 12 Apr 2011 at 6:43pm
All of A-C's generator systems were originally positive ground. When you put it all back together, polarize the system. Polarizing is in simple terms telling the generator which pole is "hot" and "ground".
It will work either way. I've heard that the regulator will not work so well if it was originally pos ground and you switch it to neg ground. My experience has been it makes no difference.

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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford


Posted By: Sitesstables
Date Posted: 12 Apr 2011 at 7:45pm
OK thanks I wondered if the polorizing would take care of the issue. I am having it all checked out since it seams to not be charging the battery. Even after been running for a long time it has to be jumped. The battery tests good. Someone said you can not use a 12V battery. But the guys at the electrical shop did not say anything and they deal with tons of old tractors and restore them selves.

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1965 D17 Series IV


Posted By: Sitesstables
Date Posted: 12 Apr 2011 at 7:46pm
Originally posted by Rfdeere Rfdeere wrote:

   Is it 6 or 12 volt ?
They have a 12V battery in it. And I have read sometings that say the series IV is 12v I will know for sure in the morning

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1965 D17 Series IV


Posted By: CTuckerNWIL
Date Posted: 12 Apr 2011 at 8:20pm
I think all series IV D17's were 12 volt.

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http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF


Posted By: Pat the Plumber CIL
Date Posted: 12 Apr 2011 at 8:24pm
Yes D-17 Ser IV gas all had 12 volt battery.Believe all D-17 had 12 volt.Our 59 was factory and it had 12 volt.

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You only need to know 3 things to be a plumber;Crap rolls down hill,Hot is on the left and Don't bite your fingernails

1964 D-17 SIV 3 Pt.WF,1964 D-15 Ser II 3pt.WF ,1960 D-17 SI NF,1956 WD 45 WF.


Posted By: Gerald J.
Date Posted: 12 Apr 2011 at 9:14pm
Some magnetic regulators were a little polarity sensitive from the choice of contact materials. Different materials for the points on the vibrating regulator unit cut cost but cut life with reversed polarity. Otherwise that type of regulator wasn't polarity sensitive.

Gerald J.


Posted By: MACK
Date Posted: 12 Apr 2011 at 9:50pm
All D17 & D15 were 12V. Some D14 were 6V.  MACK


Posted By: Sitesstables
Date Posted: 18 Apr 2011 at 2:18pm
Just an update, I put new generator in and new regulater on last week. Went and put it back to positive ground and replorized everything. It was much simpler then I though and she is running well... Next up// a new manifold

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1965 D17 Series IV



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