WD burning out kill 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=191647
Printed Date: 02 Jun 2025 at 4:58pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WD burning out kill switch.
Posted By: exSW
Subject: WD burning out kill switch.
Date Posted: 05 Nov 2022 at 5:44pm
|
'52 WD with distributor. Converted to 12v. Still positive ground. Generator puts out 13.6 charging. 12v coil with an in line resistor. Lights work. All wires chased and enclosed in loom. Keeps burning out kill switches. ------------- Learning AC...slowly |
Replies:
Posted By: MACK
Date Posted: 05 Nov 2022 at 8:52pm
|
You say kill switch. It should be a off-on switch with 12v to one side with the other wire going to resister. A kill switch grounds current from mag. MACK |
Posted By: Steve in NJ
Date Posted: 05 Nov 2022 at 9:04pm
|
I don't know how you have your Tractor wired, but if you're using a toggle type switch for a Ignition kill switch, toggles are only rated at 10-15 amps. Put in a high amp switch like a key switch or push/pull like a Cole Hersee or equivilent. Have the Generator checked at a local shop to see what amperage it's pushing out. If it's pushing some high amperage out of it, that could be why you're cooking switches also.... Steve@B&B ------------- 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: exSW
Date Posted: 05 Nov 2022 at 9:19pm
That's how it's wired. It is indeed an "on/off" switch. ------------- Learning AC...slowly |
MACK wrote:Posted By: exSW
Date Posted: 05 Nov 2022 at 9:24pm
It's cooked both. The one it came with. The push/pull from DJ's. The brass Marine grade push/pull,a three way on /off /on (both sides) and the latest a rubber shielded toggle from the starter/alternator shop. But I think your onto something with the amps. I'll put a handheld meter on it tomorrow.
------------- Learning AC...slowly |
Posted By: exSW
Date Posted: 06 Nov 2022 at 10:06am
|
Checked the amps (running) at the switch with my ES 585 Multimeter. 10 amp setting. Blew the multimeters internal fuse . So I may be on to something. ------------- Learning AC...slowly |
Posted By: steve(ill)
Date Posted: 06 Nov 2022 at 4:41pm
|
wire coming off the switch ONLY feeds the coil ? Dont want too much load thru that toggle... just the coil / distributor, which should be minimal.. 12 v coil with "NO INTERNAL RESISTOR" ?? That works, but a new design which ELIMINATES the external resistor is a good long term plan. ... maybe thats why the coil is pulling too many amps ? ------------- Like them all, but love the "B"s. |
Posted By: exSW
Date Posted: 06 Nov 2022 at 5:34pm
That wire only feed the coil.The coil does have an internal resistor. The tractor came to me with a bad coil. Already had the in line resistor. I replaced the old coil with a resistor equiped one. I've been messing with it off and on all day. This system doesn't have a regulator, just a cutout. I took the cover off and the cutout seems to work properly. The generator delivers power to the battery through the same starter post that the starter switch pulls power from and the coil on/off pulls power from.
------------- Learning AC...slowly |
Posted By: steve(ill)
Date Posted: 06 Nov 2022 at 6:10pm
|
normally a cutout does not go with a 12 volt system.. On a 6 v system, the light switch with a resistor acts as a current limiter... You have NOTHING if your using a cutout on a 12v system and no regulation of current.. If you have a 12v coil with INTERNAL resistor.. you dont need the external resistor.. a 12v generator should be wired something like this.. You need to REGULATE the voltage and current outputs..  ------------- Like them all, but love the "B"s. |
Posted By: exSW
Date Posted: 06 Nov 2022 at 6:49pm
Well I'm sorting my way through someone elses mess. I had suspected something got lost in the 12v conversion. The burnt out coil, there was a master cutoff blade switch on the battery plus the repositioned on/off switch. So I have to install a regulator,eliminate the cutout and wire accordingly. ------------- Learning AC...slowly |
Posted By: Bill_MN
Date Posted: 06 Nov 2022 at 6:57pm
|
Unless you're trying to look somewhat original I'd start over with an alternator and wire it like this  ------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: exSW
Date Posted: 06 Nov 2022 at 7:11pm
|
Probably going to stick with the gennie for now. Wiring in a regulator and rerouting a couple wires is quick,cheap and easy. When it eventually gets repainted I'll do the upgrade then. ------------- Learning AC...slowly |
Posted By: steve(ill)
Date Posted: 06 Nov 2022 at 8:03pm
|
drawing shows a regulator with a "L" terminal.. You may get one that does not have that... L is just a another feed from the BATTERY... so use the BAT terminal.. Since you have a POSITIVE GROUND... you need to get a regulator that it setup for POSITIVE GROUND... or consider just changing to NEG ground... Depends on the REG you buy.. ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 06 Nov 2022 at 8:07pm
 ------------- Like them all, but love the "B"s. |
Posted By: exSW
Date Posted: 12 Nov 2022 at 8:02pm
That's the regulator I used. Replaced the ammeter gauge and wired accordingly. Everything works and it's running ten amps off a cold start and then settles back to 4-5 with the lights on. Thanks for all the help.
------------- Learning AC...slowly |
Posted By: steve(ill)
Date Posted: 12 Nov 2022 at 8:10pm
 ... did you eliminate the RESISTOR in the line to your NEW Coil ?------------- Like them all, but love the "B"s. |
Posted By: exSW
Date Posted: 13 Nov 2022 at 8:55am
No. Would that be an issue? ------------- Learning AC...slowly |
Posted By: steve(ill)
Date Posted: 13 Nov 2022 at 9:50am
|
There is suppose to be a resistor INSIDE the coil on a new 12 v unit... If you have a OLD coil with no INTERNAL resistor, then you need the OUTSIDE resistor... Normally when you buy a NEW coil it has INTERNAL and you can eliminate the outside coil. ------------- Like them all, but love the "B"s. |