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Allis Chalmers Discussion Forum
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6-Volt System to 12-Volt System

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Dliby

04-08-2006 19:51:46




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I own a 1953 Allis Chalmers WD 40. I'm having problems with my 6-volt system and I would like to change over to a 12-volt system. Can anyone tell me what I need and how to wire it up?




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ricedaddy

05-01-2006 17:00:31




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-08-2006 19:51:46  
send e-mail address for wireing diagram
[email protected]



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Will Herring

05-01-2006 15:24:36




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-08-2006 19:51:46  
Definitely a good idea. My grandpa runs his tractor off an 8-volt battery which seems to work most of the time... I converted mine to a 12-volt system and it starts at 6AM when it's covered with dew and hasn't been started in two weeks and the battery isn't even fully charged.



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Dliby

04-09-2006 06:37:35




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 Re: 6-Volt System to 12-Volt System in reply to BobHnwOh, 04-09-2006 06:24:02  
Thanks for the diagram; it"ll be very useful. Regarding the part numbers you listed, can those be found at any tractor supply store or are they NAPA parts?



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souNdguy

04-08-2006 21:18:57




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-08-2006 19:51:46  
Old gave you good info.

Care to run your 6v problems by us though.. many are easy to correct..

Soundguy



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Dliby

04-09-2006 06:44:06




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 Re: 6-Volt System to 12-Volt System in reply to souNdguy, 04-08-2006 21:18:57  
Hooked up new 3-position light switch; 1st and 3rd position do nothing; second position turns lights on. It appears to be Off-On-On. Battery keeps draining. Had battery checked and battery is good. May have light switch hooked up incorrectly. Previous tractor owner told me that the generator was rebuilt and little box on generator appears to be new. Old wires were bare and rusted; replaced all wiring with correct gauge. What do you think?

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souNdguy

04-09-2006 17:56:52




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-09-2006 06:44:06  
Wow.. I think you are jumping the gun on wanting to go 12v just because, it's very possible that you have your switch hooke dup wrong / and or the cutout relay is bad.

Try removing the wire from the field pole on the genny, and then grounding the field tab.. your ammeter should show hi charge. If it doesnt, jumper across the cutout relay.. then it should show full charge.

For the heck of it.. try repolarizing first, with tractor off. That is, jumper arm to battery.. IE jumper across cutout for a moment.. then start her and see what you got.. if nothing.. try my full fielding advice above..

Soundguy

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Dliby

04-09-2006 18:58:05




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 Re: 6-Volt System to 12-Volt System in reply to souNdguy, 04-09-2006 17:56:52  
I think you are right about jumping the gun to 12 volt. I can operate the tractor all day and then when I turn it off, the battery's dead and won't restart until I recharge the battery. Should I unhook the light switch first to see if that's what's causing the battery drain before trying your solution? I have a positive-ground system. Does this make a diffence?



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souNdguy

04-10-2006 05:29:52




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-09-2006 18:58:05  
If the battery is dead, either the cutout relay is bad or hooked up wrong ( including light switch).. or both.. IE.. cutout is stuck closed, thus discharging the battery when the tractor is not running, and the lamp switch is not hooke dup.. thus not allowing charge.

Ground the field terminal and see if you get charge.. if not.. jumper the cutout AND ground the field. Do this AFTER you polarize the system by flashing bat to armature with the tractor not running.

Soundguy

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Dliby

04-10-2006 18:06:46




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 Re: 6-Volt System to 12-Volt System in reply to souNdguy, 04-10-2006 05:29:52  
I removed the wire from the generator that goes to the light switch and jumpered it to ground and that seemed to work. Tractor fires up even after it sits. The light switch is new and I believe it's good. It appears that I wired it up wrong. Can you tell me how to wire it correctly? I had the generator hooked up to the resistor side of the switch; and the cutout wire and lights hooked up to the fuse side. Lights only came on in the 3rd position.

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Dliby

04-10-2006 19:15:10




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-10-2006 18:06:46  
CORRECTION TO LAST MSG: I removed the wire from the generator that goes to the light switch and jumpered it to ground and that seemed to work. Tractor fires up even after it sits. The light switch is new and I believe it's good. It appears that I wired it up wrong. Can you tell me how to wire it correctly? I had the generator hooked up to the resistor side of the switch; now the generator is grounded to the frame. The lights are hooked up to the fuse side on one pin and negative jumper to the negative ammeter on the other pin. Lights only come on in the 3rd position.

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souNdguy

04-11-2006 05:41:09




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-10-2006 19:15:10  
I'm at work and don't have my I&T manual in front of me, however, your wd with the restistor lamp switch and genny with a cutout should be wired similar to my G ( and many others ). That is, the cutout is in line with the armature wire, and then next is the ammeter. All loads, like lamps & ignition, will be on one side of the ammeter, same side as wire from cutout. Other side of ammeter to charge bat. This way ammeter will show net charge or discharge.

as for wireing the lamp switch up. i would really have to have the schematic in front of me. Essentially, The unit is a dual switch. One side is controlling the lamp(s), and the other side is switching in or out a resistor in line with the field. That way you can have hi or low charge, depending on the amount of resistance in line with the field.

My guess is the wireing at the lamp switch is wrong.

Look in your I&T manual, or instructions that came with the switch. Also remember to polarize the cutout if you have not done so already.

If I find a schematic online.. I'll post it for you.

Soundguy

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steve(ill)

04-09-2006 19:11:27




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-09-2006 18:58:05  
the 6 volt generator has no voltage regulator. one of the main purposes of the light switch is to set a "HI or LO" charge rated depending if the lights are on. the "F" wire from the generator goes to the light switch. take the F wire off generator and jumper the F terminal to ground. If that works, the light switch is bad or not properly grounded.--- if that done work, then jumper around the cutout box ( little box on the genertor. It connects the "A" terminal to the amp gauge, which goes to the battery.

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Dliby

04-10-2006 19:17:32




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 Re: 6-Volt System to 12-Volt System in reply to steve(ill), 04-09-2006 19:11:27  
CORRECTION TO LAST MSG: I removed the wire from the generator that goes to the light switch and jumpered it to ground and that seemed to work. Tractor fires up even after it sits. The light switch is new and I believe it's good. It appears that I wired it up wrong. Can you tell me how to wire it correctly? I had the generator hooked up to the resistor side of the switch; now the generator is grounded to the frame. The lights are hooked up to the fuse side on one pin and negative jumper to the negative ammeter on the other pin. Lights only come on in the 3rd position.

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Dliby

04-10-2006 18:08:04




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 Re: 6-Volt System to 12-Volt System in reply to steve(ill), 04-09-2006 19:11:27  
I removed the wire from the generator that goes to the light switch and jumpered it to ground and that seemed to work. Tractor fires up even after it sits. The light switch is new and I believe it's good. It appears that I wired it up wrong. Can you tell me how to wire it correctly? I had the generator hooked up to the resistor side of the switch; and the cutout wire and lights hooked up to the fuse side. Lights only came on in the 3rd position.

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old

04-08-2006 21:08:38




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 Re: 6-Volt System to 12-Volt System in reply to Dliby, 04-08-2006 19:51:46  
First off there is not tractor made that is a WD-40. Theres WDs and WD-45 but no 40s. What you need is a 12 volt battery, a delco 10si alternater and the wireing plus a small light or diode. The alternator has 3 wires. One is the battery stud which is wired to the battery of to the post on the starter switch. The #1 wire hooks to the light or doide and then to the ignition switch and the #2 hooks to the big post on the alternator. If you search the arcives you should be able to find a wireing diagram of how its done

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Hoenes

04-09-2006 17:02:40




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 Re: 6-Volt System to 12-Volt System in reply to old, 04-08-2006 21:08:38  
All I did to convert 6 to 12 was to splice in a porcline block type coil suppresor [like the ones on the firewall of Mopar products] into the wire leading to the positive side of the coil. The only thing I changed was the battery. Same generator,same starter. Some previous owner had removed all the lights, so this was not an issue. Works fine, and has for years.



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