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Case Tractors Discussion Forum

Polarity how do you find

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Dave Olson

12-01-2005 17:39:41

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We got the old L running a few weeks ago. By the way thanks to all of you that answered my question about batteries. I'm going to try and use a single 910 CCA 6 volt battery. Also plan to use welding cable with soldered ends.

Pull started it yesterday and didn�t even turn a full revolution on the tires before it was running! :-) Had to get it running again to winterize it!

Is there anyway to determine how we should ground this tractor? Positive or negative?

The tractor also has a small button for a starter switch, but no solenoid. What is the correct way for this tractor to be wired?

Thanks,

Dave Olson - East-Central Illinois

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Smoke Buster

12-02-2005 05:56:07

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Re: Polarity how do you find in reply to Dave Olson, 12-01-2005 17:39:41

I like that "smoking here" sign with the fire extinguisher handy!

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Dave Olson

12-02-2005 14:22:16

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Re: Polarity how do you find in reply to Smoke Buster, 12-02-2005 05:56:07

Here is the rest of the sign! :-)

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Camboted

12-02-2005 03:13:46

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Re: Polarity how do you find in reply to Dave Olson, 12-01-2005 17:39:41

I'm curious, how did you get a starter on an L?? Did late models offer that as an option? The LA's had negative ground and used a direct foot contolled starter switch, all the voltage flowed directly through the switch, no solenoid. The mag had a grounding switch to shut it off.

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Dave Olson

12-02-2005 07:10:55

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Re: Polarity how do you find in reply to Camboted, 12-02-2005 03:13:46

Here is a pic of the starter, mag, and generator. I bought this tractor 2-1/2 years ago, just as you see it.

We just now started to fuss with it! Neat tractor, very easy and smooth final drive, etc. Sure nice to see/hear it work so well. My first thoughts after driving it for such a short time, is it seems to have very little wear. May have been sittin in sheds most of its life!

We are making up a battery box (Thanks for the drawing Tom Railsback)and it will be mounted on the left side.

Dave Olson

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Tom Railsback

12-02-2005 06:12:22

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Re: Polarity how do you find in reply to Camboted, 12-02-2005 03:13:46

Ted:
Electic starting was offered beginning with tractor no. 4606422 according to my parts book. I think LI's had electric starting long before that.

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Camboted

12-02-2005 21:41:32

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Re: Polarity how do you find in reply to Tom Railsback, 12-02-2005 06:12:22

Thanks guys! I learned something today. have a Merry Christmas. That is a great looking L!

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Jerry W

12-01-2005 19:16:15

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Re: Polarity how do you find in reply to Dave Olson, 12-01-2005 17:39:41

The only component of an old time automotive type electrical system that is polarity sensitive is the voltage regulator or cutout rely. Apparently they are not all that way but most are and they are usually marked for polarity and voltage.

Your coil should also be wired the same as your battery. If the - is the ground on the battery then the - post on your coil should go to ground thru the points in your distributor.

Jerry

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oldrusty

12-01-2005 18:40:52

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Re: Polarity how do you find in reply to Dave Olson, 12-01-2005 17:39:41

All Racine built trctors were neg ground

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old

12-01-2005 18:03:20

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Re: Polarity how do you find in reply to Dave Olson, 12-01-2005 17:39:41

Well this is a guess. But if it has a genny on it then its most likely to be + ground. Also being 6 volt leads me to believe it would be + ground. Starters don't care which way its grounded and I'm also guessing it has a mag and if so then that also doesn't care. Now if it has a battery ignition system then that does care which way its grounded.

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