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Case Tractors Discussion Forum
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Case S electrical problem

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Steinar Moen

08-01-2004 16:33:16




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I live in Norway and have been lucky enough to inherit a Case Model S from my grandfather. I believe it was made in 1947 (how do I find out?) The tractor has not been started for about 40 years, but is in good shape. I have found that there is no spark. I took off the magneto cap, but I have never seen anything like what I found under the cap. I did not pull off the first drive gear, because I do not know how to time it correctly with the small gear. Then I do not have access to the points either. I have the original "Operator's manual", but it says nothing about my problem except timing the magneto. So, here I am, without any clue what to do. I would very much like to honour my late grandfather by making his old US tractor run! I appreciate any help!

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C. Amick

08-02-2004 10:14:24




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 Re: Case S electrical problem in reply to Steinar Moen, 08-01-2004 16:33:16  
The first thing that I would do is to sand the points with a very fine piece of sand paper and see if that helps. I figure the condenser and/or coil are probably dead after sitting for that long. If it is a Case magneto, replacement parts are hard to find. There is a guy named John Saeli who can be contatcted through this web site, that sells rebuilt Case Magnetos. Your other options are to replace it with another type magneto or with a distributor, either are pretty easy to find.

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Steinar Moen

08-02-2004 15:11:16




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 Re: Case S electrical problem in reply to C. Amick, 08-02-2004 10:14:24  
Thank you for your answers!
I learned how to time the two gears from another answer in this forum. I will try to adjust the points gap, but I find it hard to fix the gear in position for maximum gap. The spring makes the gear turn quickly as I crank the engine. Do you know how to solve this problem?



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Allan C

08-02-2004 21:33:00




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 Re: Case S electrical problem in reply to Steinar Moen, 08-02-2004 15:11:16  
The spring you refer to is called the impulse starter. It delays the spark for starting and also gives the magneto a quick "flip" when it releases to give a better spark. The only way to beat it when the magneto is on the tractor is to turn the engine backwards to the high place on the cam. ( If the Mag is off can turn it upside down)



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C. Amick

08-02-2004 11:38:16




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 Re: Case S electrical problem in reply to C. Amick, 08-02-2004 10:14:24  
You might check to make sure it's not something as simple as the kill wire, that comes out the bottom of the magneto, being grounded. Have you disconnected it from the ignition switch, just to make sure?



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Steinar Moen

08-02-2004 15:19:23




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 Re: Case S electrical problem in reply to C. Amick, 08-02-2004 11:38:16  
No, I have not disconnected it yet, but I will try it tomorrow.
I know that there is a condenser inside the magneto, but is there a coil also?
Do you know how to locate the exact source of the problem if it doesn't come to points?



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C. Amick

08-03-2004 09:22:23




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 Re: Case S electrical problem in reply to Steinar Moen, 08-02-2004 15:19:23  
Yes, the coil is in the top of the magneto behind the condenser. Case made two different magnetos for this tractor. The later ones had a one-piece steel body. The older ones had a removable cap on top for access to the coil. The coil is difficult to remove from the newer ones and requires pulling. If the problem is not the points then, I would try to replace the condenser. Try magnetoparts.com for the condenser. I think they can also repair your coil, if you want to got that route.

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Paul f

08-01-2004 17:12:07




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 Re: Case S electrical problem in reply to Steinar Moen, 08-01-2004 16:33:16  
Steinar: Welcome...As to the year of your tractor can you find the serial number? Should be a tin plate on the instrument panel...if that is missing check the engine flange where it mounts to the transmission on the left side (as you sit on the tractor for a stamped number.

As to the Mag there are better experts than I....however do not try to pull the drive gear off there is a set screw. Paul f

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Steinar Moen

08-04-2004 12:52:21




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 Serial number: in reply to Paul f, 08-01-2004 17:12:07  
I found this serial number on the plate on the dashboard:

5103452SEX

EX is printed in a different font, maybe
it indicates that this tractor is an export model?

How can I read the model year from the serial number, and do the other digits have a meaning?



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C. Amick

08-05-2004 09:36:58




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 Re: Serial number: in reply to Steinar Moen, 08-04-2004 12:52:21  
Yes, EX does mean Export. You subtract 4 from the first 2 digits to get the year of manufacture (51 - 4 = 47). The other digits would tell you whether it was made in early 1947 or late. Click on "Serial Numbers" under "Research and Info. on this web site.



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allan C

08-04-2004 13:36:43




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 Re: Serial number: in reply to Steinar Moen, 08-04-2004 12:52:21  
That would be a 1947



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Steinar Moen

08-02-2004 15:15:03




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 Re: Case S electrical problem in reply to Paul f, 08-01-2004 17:12:07  
Thank you!
I know that the number is where you say, I will find it and report back to see if you can help me!



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