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Harry Ferguson Tractors Discussion Forum

TO20 generator terminals

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Author  [Modern View]

06-25-2020 12:11:52

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How do I know which one is A and which one is F? There is a cast into the case near one terminal but I see nothing else.

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06-28-2020 07:01:03

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 Re: TO20 generator terminals in reply to SteveinMo, 06-25-2020 12:11:52  
Maybe these pics will help. This is my TO-35 Diesel, but it's a TO-30 generator. Might not be able to see very well, but the "F" terminal is closest to the floor, near the tag (second pic). The "A" terminal is closest to the engine. Front of tractor is to the right in the pictures

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Jim L WA

06-27-2020 12:56:54

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 Re: TO20 generator terminals in reply to SteveinMo, 06-25-2020 12:11:52  
Can you trace the wires to the voltage regulator? You may be able to read the terminals there.

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Ferguson to20 carson

06-25-2020 13:15:32

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 Re: TO20 generator terminals in reply to SteveinMo, 06-25-2020 12:11:52  
They should be stamped into the casting of the generator next to each of the 2 posts. If there is any old paint they try rubbing some of that off that should help you to find it. If you can identify one then you know the other.

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06-26-2020 08:35:09

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 Re: TO20 generator terminals in reply to Ferguson to20 carson, 06-25-2020 13:15:32  
Well I removed both wires from the terminals. Wire brushed the area pretty well. This looks like it may be the original generator on my tractor. Still cannot se anything stamped on the generator. What if I jump started the tractor could I get a voltage reading from one terminal or the other to ground.

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Ferguson to20 carson

06-26-2020 11:55:51

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 Re: TO20 generator terminals in reply to SteveinMo, 06-26-2020 08:35:09  
To check to see if your generator is charging if you do not know if it is or no get a multi meter and set it to DC current. Then put the wires on the 6 volt positive ground battery black to black and Red to Red. It should reads at a steady 7.2 volts is a good number. I would not jump the 6 volt battery to start it only if you have another 6 volt battery to use, I would not put jumper cables on a 6 volt battery from a 12 volt battery. Good Luck!

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