12 volt battery 6 volt system?

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Justin
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Zip Code: 99344

12 volt battery 6 volt system?

Postby Justin » Mon Oct 31, 2016 8:00 pm

Hello, I just joined your forum as I just bought a '48 cub it has a 12v battery but it looks to have a 6v system how do I figure out what system it has?

staninlowerAL
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Re: 12 volt battery 6 volt system?

Postby staninlowerAL » Mon Oct 31, 2016 8:33 pm

Welcome to the FORUM. Manuals are available at the top of this page: PDF MANUALS. Some things to check: Alternator or generator/VR? If generator/VR, the 6v OEM tag will be black letters vs red letters for 12v. '48 would have originally had a magneto, does yours have one or has it been changed to battery/distributor/external coil? If magneto, does it have the original type internal coil or external coil conversion? Is there a ballast type resistor in the ignition circuit? A picture of the right side of the engine would help.

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Glen
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Re: 12 volt battery 6 volt system?

Postby Glen » Mon Oct 31, 2016 9:00 pm

Hi,
Welcome to the website. Here is a page from the 1949 Cub owner's manual showing the electrical system on the right side of the engine. This shows what was originally there. A 1948 Cub was the same in the pic that is showed there.
They were 6 volts, positive ground.
Like Stan said above, they originally came with a magneto, the Battery Ignition Unit came out in 1950, and some Cubs made before then were changed to that.
The whole owner's manual is below that, it is a good idea to read it if you never have before.
It has much info about operation, lubrication, and maintenance.
It has a table of contents on page 1, that makes it easier to use on the internet.
Click on the pics makes them bigger. Looks like you are in Wa. too. :)

http://farmallcub.com/rudi_cub/www.clea ... age-33.jpg

http://farmallcub.com/rudi_cub/www.clea ... index.html
Last edited by Glen on Mon Oct 31, 2016 9:15 pm, edited 1 time in total.

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Mon Oct 31, 2016 9:12 pm

Thanks for the info guys and the warm welcome I didn't think I would get a reply so fast. I will try and get a pic posted up here. I did look at the battery and it is still positive ground...

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Mon Oct 31, 2016 10:02 pm

I am in eastern wa Glenn. here is the pic of the right side of the tractor thoughts? thanks again
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Glen
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Posts: 2518
Joined: Mon Mar 19, 2012 7:33 pm
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: 12 volt battery 6 volt system?

Postby Glen » Tue Nov 01, 2016 1:18 am

Hi,
The electrical parts in your pic are newer than 1948. The Cub has the voltage regulator on the side, which came out in 1950. It has Battery Ignition too, which came out then, but could have been added later.
Have you checked the tractor serial number, it looks like the plate is painted over in your pic.
The number is stamped in the plate, it is probably 6 numbers. Use a light and look at the right angle and you might be able to read it. Then we can tell what year the Cub is.
The hood is a 1947 - 1954 style.
Here is a page from a 1955 Cub owner's manual showing the electrical parts.
It looks like the rod and starter switch lever are gone on your Cub, unless the pic is not showing them. There is supposed to be a rod so you can start the engine while sitting in the seat. It shows them in the pic below. :)

http://farmallcub.com/rudi_cub/www.clea ... age-39.jpg

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Tue Nov 01, 2016 9:22 am

Thanks glen. The rod and starter switch is there it was cut out of the photo. I looked up the serial number and as far as I can tell it is an early 1948 model. So it sounds like it is still a 6v system. That has been upgraded by a few years. So do I need to make any more upgrades? I would like to keep it 6v. It needs new lights as far as I can tell also do I need to put a 6v battery in for them to work thanks again to all that have helped. I am trying to learn about these reactors as it is my first one thank you all again

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Tue Nov 01, 2016 4:51 pm

So question number two how do I check what voltage is coming out of the regulator with a multimeter thanks

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Glen
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Location: Wa.

Re: 12 volt battery 6 volt system?

Postby Glen » Tue Nov 01, 2016 5:10 pm

Hi,
It is probably still 6 volts, but without being there, it is hard to tell.
Do you see 6 numbers in the serial number, or 5. I think you are probably not seeing the 1 at the beginning of the number. Seeing 5 numbers when there is 6 could make it look like a 1948 Cub.
Here is info from TM Tractor about the date codes, they help identify when a Cub was made.
It needs a 6 volt battery if it is still a 6 volt system.
You might have to remove the hood and look at the plate on the generator to be sure it is 6 volts. I can tell from the model number on the plate if it is original. The original generators had a plate that looked like the plate on the starter.
Or if you can read the number with a light and a mirror somehow, that would be easier than removing the hood. :)

http://www.tmtractor.com/id/castdate_loc.htm

http://www.tmtractor.com/id/id_004.htm

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Tue Nov 01, 2016 6:06 pm

The model number on the tractor is 118539 the cast number on the block is 8-16-T that's shows 1950?the generator looks original I will have to pull the hood to see the tag on it I plan on doing that this weekend. I didn't know if there is a way to use a multimeter on the regulator to check the voltage or not thoughts ? Thanks again glen

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Re: 12 volt battery 6 volt system?

Postby tst » Tue Nov 01, 2016 6:16 pm

that cub would have had a cut out relay mounted on top of the generator so it has been changed to a new type with a regulator, is the metal tag still on the generator? if so the #s will tell if it is 6 or 12 volt, also if the tag is black it is 6 volt, red tag is 12 volt

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Glen
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Joined: Mon Mar 19, 2012 7:33 pm
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: 12 volt battery 6 volt system?

Postby Glen » Tue Nov 01, 2016 6:35 pm

Hi,
Tim, Raymond Durban's data base shows that IH changed to the voltage regulator at serial number 115403, Justin's Cub was made a little after that, so would have had the regulator as it is in his pic above.
The database says Battery Ignition became available at 115403, and it says they used the 3 position light switch starting at 115403 also.
Glad you figured out the number. That is the serial number, Justin, not model number.
The database says 118539 would have been built in November 1950.
I don't remember seeing on here where anyone was able to figure out the voltage using a meter like you asked, Justin. Maybe someone will write about it. :)

Justin
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Re: 12 volt battery 6 volt system?

Postby Justin » Tue Nov 01, 2016 9:16 pm

Thank you for all the help the information you guys have found is very helpful and much appreciated. Looks like I need to get the correct 6v battery in there so I can get the lights working and not damage the electrical system looks like I have some work to do this weekend Thanks again

Justin
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Joined: Mon Oct 31, 2016 7:57 pm
Zip Code: 99344

Re: 12 volt battery 6 volt system?

Postby Justin » Mon Nov 07, 2016 5:59 pm

So upon doing some maintenance on the cub this weekend I pulled the good and it is a 6v generator so looks like I will be outing in a 6v battery. Also changed all the gear lube had water in them. To 80-90wt just have to do the finals looks like you have to drop the final pans to do this?

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Glen
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
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Location: Wa.

Re: 12 volt battery 6 volt system?

Postby Glen » Mon Nov 07, 2016 6:30 pm

Hi,
Glad you figured out the voltage.
Yes, you remove the final drive pans to change the oil, the owner's manual tells about it, and other maintenance things. The pans have gaskets, they might tear, or need replacing if you remove the pans. Here is a listing for new gaskets at TM Tractor.
Below that is a 1950 owner's manual, if you don't have one.
The info for the final drives is on page 21.
The manual has a table of contents on page 1, makes it easier to use on the internet. The lube section is on pages 18 - 21.
They had not updated the manual yet, evidently, it does not show the newer voltage regulator, or Battery Ignition Unit, like your Cub has. They are in the 1955 owner's manual, the link I posted in a post above is from there. That manual shows how to replace points in a Battery Ignition Unit. Here is the link for it below too. :)

http://www.tmtractor.com/new/fr/125fp.htm

http://farmallcub.com/rudi_cub/www.clea ... index.html

http://farmallcub.com/rudi_cub/www.clea ... index.html


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