Farm Equipment - resistor location on coil?

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resistor location on coil?

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=13101
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Topic: resistor location on coil?

Posted By: John In.
Subject: resistor location on coil?
Date Posted: 28 May 2010 at 11:38pm

Well, I went and done it..changed over to 12 volt.. got tired of replacing 6V batteries, I had a 12 V. genny but found out it was shot. Went to a delco alt. also changed to negative ground. The question I have here is the coil calls for a resistor..do you hook it up before or after the coil ?

Thanks, John

Replies:

Posted By: Rfdeere
Date Posted: 29 May 2010 at 12:16am

Before coil.

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Randy Freshour,Member Indiana AC Partners,
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Posted By: jaybmiller
Date Posted: 29 May 2010 at 6:02am

Electrically it doesn't really matter. It's parts of a series circuit.+12volts to switch to coil to resistor to points to ground is the same as +12 volts to switch to resistor to coil to points to ground. Physically it's easier and neater to wire it between the switch and the coil + wire. Electrons don't care...

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: Fred in Pa
Date Posted: 29 May 2010 at 7:21am

Just put a 3 ome coil on it ,then you need NO resistor

Posted By: GregLawlerMinn
Date Posted: 29 May 2010 at 7:31am

John

The ballast resistor is sensitive to the elements. Install it in a place that protects it from the elements (inside the tool box?). When I convert a CA to 12 volt, I use a 12 volt Gennie (for the original look) and mount the VR inside the tool box to protect it from the elements and to maintain the original look. I also purchase a 12 volt internally resisted coil (not too expensive from your local auto parts store) instead of re-using the 6 volt coil and the ballast resistor for reliability reasons.

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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC

Posted By: CTuckerNWIL
Date Posted: 29 May 2010 at 1:43pm

Go to Farm and Fleet and buy a new 12 volt coil and forget about the resistor.

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

Posted By: John In.
Date Posted: 30 May 2010 at 7:35pm

thanks guys, I do have a 12V genny but it was no good so I borrowed the Alt. from my Monti that I am restoring. I already had the coil and the paperwork said that I needed the resistor. Thanks again Jhon