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6 Volt Field Control Light Switch

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=200081
Printed Date: 04 Dec 2024 at 9:41pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: 6 Volt Field Control Light Switch
Posted By: Sanchez
Subject: 6 Volt Field Control Light Switch
Date Posted: 02 Mar 2024 at 10:35pm
My WD45 is running a fully functional 6 volt generator with a cutout relay and charge controlled by the resistor on the light switch. I’ve managed to break the resistor on the light switch while repairing the battery box. Instead of buying a new switch I’d like to replace the resistor . I believe I need a resistance of around 3 Ohms to charge at low rate, can I use a light bulb with a 3 ohm resistance in place of the resistor? Or is there too much juice flowing through the circuit for the bulb filament to handle? Another thought would be to use a rheostat to ground to make a variable charge control. I have one I can tune in this resistance range, but I don’t know if the field current would smoke the rheostat .
Electrons are not my strong suit, let me know what you think.
Cheers Richard



Replies:
Posted By: PaulB
Date Posted: 03 Mar 2024 at 6:26am
The Brillman Co. has just the resistor. http://www.brillman.com " rel="nofollow - www.brillman.com  ;  1-888-274-5562.  That's the first and only place I go to for anything electrical.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY


Posted By: JoeM(GA)
Date Posted: 03 Mar 2024 at 6:40am
our own Steve of B &B Custom Circuits, Steiner Tractor Parts, DJS, Brillman all offer the resistor for your switch 



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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB


Posted By: steve(ill)
Date Posted: 03 Mar 2024 at 12:36pm
https://www.steinertractor.com/IHS950-Field-Resistor-on-light-switch





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


Posted By: Steve in NJ
Date Posted: 03 Mar 2024 at 6:04pm
Put the resistor in. Don't buy that aftermarket switch. It doesn't fit in any of the AC instrument panels without grounding itself out. If you need a whole switch, I think we're the only company that offers the OEM switch rebuilt/restored "that fits" on exchange or outright. If the switch is workin', just put a resistor in it and yer' good ta' go!
Steve@B&B


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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife


Posted By: Les Kerf
Date Posted: 03 Mar 2024 at 8:00pm
Originally posted by Sanchez Sanchez wrote:

... can I use a light bulb with a 3 ohm resistance in place of the resistor? ...


Yes.
An ohm is an ohm is an ohm. The electrons do not care one whit.
Can't say that I would do it that way myself though Tongue



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