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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Generator Charging?

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Steven, Avilla

05-19-2008 18:51:55




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I just had the generator rebuilt on my 165 and put on a new regulator. Now I think my new amp gage must be bad because the needle doesn't move at all. It doesn't even move to the negative when you are starting the engine. I'm hoping it's the gage anyway. My question is when the tractor is running I can see small sparks from the brushes in the generator and I'm wondering/hoping that this is normal? Does this mean the generator is working and my gage is just bad?

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Masseynut(Australia)

05-20-2008 01:38:34




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 Re: Generator Charging? in reply to Steven, Avilla MO, 05-19-2008 18:51:55  
Has the generator been polarised after the re-build? If not, it will not throw out a current. To check to see if it has, indeed, been polarised, connect the field and dynamo terminals on the back of the generator together with a bridging wire, then connect a 12 volt test light to the connected terminals, and earth the wire from the test-light to the dynamo body. Now start the engine and SLOWLY rev the engine. If the test light glows, the generator is OK. The problem may then lie with the earth wire coming from the regulator. Remove the bolt that connects the earth wire to the chassis, and clean the terminal and mounting point. The amp meter gauges seldom give any problems. See how you go, regards, Evan.

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Devin Schatzel

05-19-2008 19:40:12




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 Re: Generator Charging? in reply to Steven, Avilla MO, 05-19-2008 18:51:55  
i'd check all the connections first



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