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8N generator test

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Bob Roelf

09-06-2001 13:51:30

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Recently I replaced the generator on my 1949 8N because of a frozen pully.

I energized the new (rebuilt) generator after I installed it and I think I did these two tasks correctly. However, I'm beginning to doubt that the generator is working properly since the battery seems to run down as I operate the tractor.

My question - is there a quick and dirty way to test the generator output while the tractor is running by using my voltmeter? My tractor's ammeter is broken so it's of no help to monitor charging rate. If the generator checks out O.K. the problem may be in the voltage regulator, battery, or some other part of the circuit. I'll check that stuff later.

I did check the archives for past information, but wasn't able to figure out exactly what to do after reading the posts. I'm a bit slow with electrical stuff.

Thanks to anyone who may have some advice for me.

Bob

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Canadianiner

09-06-2001 14:48:37

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Re: 8N generator test in reply to Bob Roelf, 09-06-2001 13:51:30

Measure the voltage at the generator output with the tractor not running. Should be zero. If not zero your cutout isn't.
Measure the voltage at the battery with the tractor not running should be between 6.0 and 6.6 volts. Note the reading.
Start the tractor.
Measure voltage at the battery. With tractor at about 1500 rpm the voltage should be noticeably higher than previous reading. If not noticeably higher check voltage at generator. If higher than previously noted battery voltage you have a problem between the generator and the battery. If low or equal voltage you probably need to adjust the generators output. If no voltage I would try flashing the field again.
I am assuming you are 6 volt positive ground.

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Claus

09-06-2001 14:39:10

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Re: 8N generator test in reply to Bob Roelf, 09-06-2001 13:51:30

Yes, check out site below for the "Electrically Challanged"
Happy Motoring
Claus

Electrical Site

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