Found 12 volt generator on a 6 volt system....

Below is a page from the 1950 Cub owner's manual, showing the electrical system, with the hood off.
It shows the generator with the Relay on top of it, and the magneto. This system was used for Cubs serial numbers 501 - 115402.
https://farmallcub.club/rudi/farmallcub.com/rudi_cub/www.cleancomputes.com/Cub/Cub Owner's Manuals/McCormick Farmall Cub Owner's Manual 1950/Page 33.jpg

Below is a page from the 1955 Cub operator's manual, showing the newer electrical system, with the voltage regulator, and the Battery Ignition unit. This system was used for Cubs serial number 115403 and above.

Below is a page from the 1950 Cub owner's manual showing the oil pressure gauge, and where it originally is.
https://farmallcub.club/rudi/farmal...k Farmall Cub Owner's Manual 1950/Page 05.jpg

The experts on here recommend people read the Cub owner's or operator's manual closest to the year of your Cub. They have lots of info. Manuals are near the top of the page at Resources, then at Farmall Cub on the left side of the page. I guess you can't use the manuals there if you are a new member.
 
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Jim Becker said:
Different versions of the generator used different pulleys. The pulley changed when they added the cooling fan (which you have). I doubt that pulley could be used on an earlier generator but haven't tried it. A rebuilt generator will probably come without a pulley. A used one is likely to have the correct pulley on it. I see that tst indicated he could help supply a generator. He knows about the pulleys and if you get a generator from him, he can make sure you get the right pulley.
Click to expand...
Thank you.
 
Glen said:
Below is a page from the 1950 Cub owner's manual, showing the electrical system, with the hood off.
It shows the generator with the Relay on top of it, and the magneto. This system was used for Cubs serial numbers 501 - 115402.
https://farmallcub.club/rudi/farmallcub.com/rudi_cub/www.cleancomputes.com/Cub/Cub Owner's Manuals/McCormick Farmall Cub Owner's Manual 1950/Page 33.jpg

Below is a page from the 1955 Cub operator's manual, showing the newer electrical system, with the voltage regulator, and the Battery Ignition unit. This system was used for Cubs serial number 115403 and above.

Below is a page from the 1950 Cub owner's manual showing the oil pressure gauge, and where it originally is.
https://farmallcub.club/rudi/farmallcub.com/rudi_cub/www.cleancomputes.com/Cub/Cub Owner's Manuals/McCormick Farmall Cub Owner's Manual 1950/Page 05.jpg

The experts on here recommend people read the Cub owner's or operator's manual closest to the year of your Cub. They have lots of info. Manuals are near the top of the page at Resources, then at Farmall Cub on the left side of the page. I guess you can't use the manuals there if you are a new member.
Click to expand...
Thank you!
 
Glen said:
Thanks for the pictures.
It would help if we knew the serial number of the Cub, so we know what it originally came with.
Jim B. is asking in post 12 above if the generator drive pulley on the Fan Hub is a bigger diameter, or a smaller diameter than the fan belt pulley, next to it. Not about the pulley on the gen. The pulley on the gen is the driven pulley.
IH changed the size of the gen drive pulley on the Fan Hub in the early 1950's.
The plate on the gen says 12 volts also.
The gen is probably the newer, vented. or open type, with the fan on the front, by the pulley.
The 1101355, and 1100501 gens are sealed, there is no fan at the front pulley. They have a removeable band that comes off, and can be fully disassembled if needed.

It looks like the original light switch is gone. They have a large knob that turns. They are shown in the Cub owner's or operator's manuals.
Someone has put the oil gauge in the dash, they originally are at the oil filter housing.
A 40 lb oil gauge works better for a Cub, the Cub service manual says they have about a 35 lb oil pressure system. A 100 lb gauge would probably never use over half the gauge readings.

J P Tractor Salvage may have a used or rebuilt generator. To get to their website, click on Forums near the top of the page, and they are near the bottom of that page.
Tell them the Delco model number of gen you need. The 1100501 gen is made to be used with the voltage regulator.
If we knew the serial number of the Cub, we could tell what it originally came with.
Click to expand...
Thank you. Very helpful information. The serial number is unknown because the plate is missing. I am guessing 1948 because the engine casting is late 1947 and the final drive castings are both April 1948. The tractor is a Frankenstein as you can tell by the wiring system. The touch control block is 1955. Fan hub has a smaller diameter and thinner belt than fan belt pulley.
 
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