Switch to full style
Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Forum rules

Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Post a reply

12 volt coil on a 6Volt magneto system?

Tue Nov 27, 2012 10:14 pm

I recently inherited a cub that has a 12 volt coil on it and a resistor in line with it. Will that work correctly?

Re: 12 volt coil on a 6Volt magneto system?

Tue Nov 27, 2012 11:05 pm

Yes, it will. That is normal hook up for a coil on 6 volt system. Out of curiosity, is it a magneto or distributor?

Re: 12 volt coil on a 6Volt magneto system?

Wed Nov 28, 2012 7:04 am

It is a magneto. Do I use a 6 or twelve volt battery?

Re: 12 volt coil on a 6Volt magneto system?

Wed Nov 28, 2012 7:16 am

That set-up will require a 12v battery, but you should look things over to see if the tractor has been converted to 12v or just the ignition system.

Re: 12 volt coil on a 6Volt magneto system?

Wed Nov 28, 2012 9:02 am

I mistyped above, I meant to say that is a normal setup for a coil on a 12 volt system. On a 6 volt system the resistor would be left out. As Gary pointed out, does it have a 12 volt generator on it, or an alternator, or is the generator still 6 volt? If you are not familiar with the setups, a magneto did not originally have an external coil requiring power from the tractor. It's coil was internal, but conversions using external coils are common due to the expense and relatively short life of the older magneto coils.

Re: 12 volt coil on a 6Volt magneto system?

Thu Nov 29, 2012 8:57 pm

It looks like a generator but I do not know whether it is 6 or 12 volts. Most likely it is still 6 volts. Is it easy to identify if it has been changed over to 12 volts?

Re: 12 volt coil on a 6Volt magneto system?

Thu Nov 29, 2012 9:43 pm

countryguy wrote:It looks like a generator but I do not know whether it is 6 or 12 volts. Is it easy to identify if it has been changed over to 12 volts?
Red Delco identification tag on generator side - 12 volts. Black identification tag, 6 volts.

Voltage of battery installed when purchased?

Re: 12 volt coil on a 6Volt magneto system?

Fri Nov 30, 2012 6:34 pm

It did not have a battery in it when I got it.

Re: 12 volt coil on a 6Volt magneto system?

Fri Nov 30, 2012 6:58 pm

countryguy wrote:It did not have a battery in it when I got it.
Well then, check the identification tag on the side of your generator.
Eugene wrote:Red Delco identification tag on generator side - 12 volts. Black identification tag, 6 volts.

Re: 12 volt coil on a 6Volt magneto system?

Sat Dec 01, 2012 9:01 pm

I found a wiring diagram of a cub tractor and the tractor is definately wired positive ground. The tag on the generator doesn't have any color on it but the generator has oil cups on it for lubrication which leads me to beleive it is a 6 volt generator. I also found a picture of a 6 volt generator on a website and it was identical to mine.

Re: 12 volt coil on a 6Volt magneto system?

Sun Dec 02, 2012 9:42 am

RED or BLACK tag on gen---thanks for that useful info, Eugene..this forum has always amazed me--continuously learning!!!!! :{_}:

Re: 12 volt coil on a 6Volt magneto system?

Sun Dec 02, 2012 10:47 am

countryguy wrote:I recently inherited a cub that has a 12 volt coil on it and a resistor in line with it. Will that work correctly?
It's probably a 6 volt coil with inline resistor. This would mean that the battery - electrical system is 12 volt.

If the 12 volt coil with inline resistor were powered by 6 volt battery/electrical system - primary coil winding voltage would more than likely be on the absolute minimal side to fire the spark plugs.

countryguy wrote:I found a wiring diagram of a cub tractor and the tractor is definately wired positive ground. The tag on the generator doesn't have any color on it but the generator has oil cups on it for lubrication which leads me to beleive it is a 6 volt generator. I also found a picture of a 6 volt generator on a website and it was identical to mine.
Presence of oil cups and comparing a picture of a generator on the internet does not mean that it's 6 volts. 6 and 12 volt generators are almost identical in size and appearance.

CharlieK wrote:RED or BLACK tag on gen---thanks for that useful info, Eugene..this forum has always amazed me--continuously learning!
If the tag is still present and the color gone - you can look the generator part number, from the tag, on line or in the service manual to determine the generator's voltage and amperage.

Re: 12 volt coil on a 6Volt magneto system?

Sun Dec 02, 2012 5:53 pm

Thanks guys for all of your help! I will get it figured out eventually. :)

Re: 12 volt coil on a 6Volt magneto system?

Sun Dec 02, 2012 6:27 pm

It is a Delco Remy 1101355 generator. From a post I read I beleive it to be a 6 volt generator, correct???

Re: 12 volt coil on a 6Volt magneto system?

Sun Dec 02, 2012 6:39 pm

From the TC-37C Parts Catalog (08-29-52) - Electrical

Image

IH Part # 45 634 D with Delco # 1101355 with Delco # 1116766 Relay (Cut-Out) is indeed 6 volts
Post a reply