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Case tractor - what year?

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racerjej
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PostPosted: Fri Aug 05, 2022 4:38 pm    Post subject: Case tractor - what year? Reply to specific post Reply with quote

I bought a 1945 to maybe 1950 Case SC tractor about a month ago. I ve done some searches on the net and found a few examples that look pretty close to what I have. It came out of a meadow where it had sat with 5 to 6 other tractors. It was sold with a bill of sale so I don t know what year it is. The vin plate is intact on the dash

I ve tried a few searches here on the forum to try to research the serial number. I need to determine the year so I can try to find specific information concerning the right carb rebuild kit, whether it is a 6 volt positive ground, whether it is a mag or distributor and on and on

Thanks
 
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Dieseltech
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PostPosted: Fri Aug 05, 2022 4:46 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

I was told years ago on some Case models to subtract 4 from the first two numbers of the serial number. Number starting with 52 would be a 1948 for example.
 
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Janicholson
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PostPosted: Fri Aug 05, 2022 4:49 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

The serial number listings are too the left on this site (classic view, not Modern view) the voltage and polarity are originally 6
v and positive ground. but that is an assumption because farmers change things very often. A mag ignition will have a built in
coil on top with a kill switch that grounds the mag to kill the engine. Mags do not have any connection to voltage from the
electrical system. One wire goes to the kill switch and the switch body grounds that wire to stop spark. A distributor system
will have a cylindrical can type coil separate from the distributor body and the ignition switch will have one wire to the coil,
and one to a voltage source. Good luck. This site sells manuals and parts. Jim
 
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casecollectorsc
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PostPosted: Fri Aug 05, 2022 5:04 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

6 volt negative ground.
 
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thehickdaddy
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PostPosted: Fri Aug 05, 2022 5:05 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

correct, j i case 7 digit serial numbers for the S series tractors and many other models from late 1930s thru the 1950s

subtract 4 from first 2 numbers such as 42 minus 4 equals 1938
case tractor serial number years

 
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J Hamilton
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PostPosted: Fri Aug 05, 2022 5:21 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

When it came from the factory it would have
been 6 volt negative ground, as
casecollectorsc stated, and it would have
been magneto ignition. For parts, as many of
ts Case guys do, call John Saeli at Saeli
Implement 315-585-9826 he also posts on the
Case forum here
 
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rustred
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PostPosted: Fri Aug 05, 2022 5:23 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

bull, its 6 volt positive ground.!
 
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J Hamilton
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PostPosted: Fri Aug 05, 2022 5:33 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

Factory original it was negative ground 6 volt
 
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rustred
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PostPosted: Fri Aug 05, 2022 5:50 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

how do u know that? dont matter what tractor or make 6 volt has been positive ground for ever. even my DC4 is positive ground and it has not been played with. so like to see an actual evidence.
 
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rustred
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PostPosted: Fri Aug 05, 2022 5:56 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

its a pull out to stop switch, always mixes me up because its opposite of mccormicks switch which is out to run.
 
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racerjej
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PostPosted: Fri Aug 05, 2022 6:31 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

Thank you one and all for your responses

Its a 1950, so now I can continue on with the adventure of messing with it.
 
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J Hamilton
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PostPosted: Fri Aug 05, 2022 6:59 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

Do the research, lots of info in the Case forum here as well. All Racine built Case tractors, SC-DC-LA were 6 volt negative ground from the factory. If you can prove otherwise, I will admit I'm wrong on this.
 
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chcase
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PostPosted: Fri Aug 05, 2022 7:11 pm    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

As stated below, it was 6 volt neg ground
from factory. Alot of people have hooked
them up the other way over the last 70
years plus not knowing the correct way. If
it has seven digits in the serial number,
then subtract 4 from the first two
numbers. LoOK close as sometimes the first
number is partly under the left mounting
screw. Most of us that own a sc really
enjoy owning them.
 
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chcase
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PostPosted: Sat Aug 06, 2022 3:06 am    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

Rustred, As a few others have stated the Racine build case tractors were neg ground from factory. Most all other company's used pos ground on their 6 volt systems. If you have a owners manual for your dc or sc it will show it I am sure alot got switched back to pos ground over 70 yrs of use.
 
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Sprint 6
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PostPosted: Sat Aug 06, 2022 3:21 am    Post subject: Re: Case tractor - what year? Reply to specific post Reply with quote

6V doesn't automatically mean positive ground. Everyone did things their own way. My 1950 Willys is 6V negative ground. 6V GM vehicles were also negative ground. Then on the flip side, my 1954 International is 6V positive ground.

Likewise, 12V does not mean negative ground. Generator equipped 12V Olivers were positive ground, as my 1957 keystart Super 55 was. Some alternator equipped British cars were positive ground 12V.
 
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