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Harry Ferguson Tractors Discussion Forum
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A/C Delco Starter Distributor Condensor issues

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BlakeABP

11-30-2021 19:27:45




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Hey fellas, I got a wierd one for you. Just recently got my engine back from the engine shop. A full rebuild on an old Continental Z129 on a TO30. Spent way more on the rebuild than the darn thing was worth! Oh well, its done now.

Anyways, i just put the whole tractor back together. It was split to pull the motor. Shortly after inital break in, right after i wired back up the alternator she started to sputter. It turned to be a bad condensor on the distributor. However, as soon as I wire my distributor back up it starts having the same issues! I unwire the alternator and she is smooth as butter again. I dont understand how this same alternator wired the same way worked perfectly well before hand and now its doing this. I do have it wired a little weird, but it worked previously. Maybe one of you guys can set me straight and call me an idiot. Thats okay.. i know what I am!

Its a standard AC delco alternatir with the main power lug which goes to my ammeter then to poistive side of the battery. The ground lug I have striaght to the body.. then i have the two smaller terminals labeled 1 and 2. I take positive striaght from the positive lug on the alternator to #1 and then #2 goes to a switch on my console. I flip the switch to pit power on #2 to engage the alternator, and it does engage. I can stick a wrench to the back of the alternator when the switch is made and power shows to be added on the ammeter. As soon as I do this though, ot starts to sputter. Its interfering some how with the condensor.

I would wire the alternator a different way but i dont know of another way that works honestly.. Any ideas guys?

Thanks for your time!

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Jim L WA

12-01-2021 10:37:09




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 Re: A/C Delco Starter Distributor Condensor issues in reply to BlakeABP, 11-30-2021 19:27:45  
How do you have the battery wired, polarity wise?



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wore out

12-01-2021 08:03:35




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 Re: A/C Delco Starter Distributor Condensor issues in reply to BlakeABP, 11-30-2021 19:27:45  
Quoting Removed, click Modern View to see

Yes, #2 can have constant power, the power to #1 needs to go off with the ignition switch, or an oil pressure switch can be used to supply power to the #1 terminal only when the engine is running/has oil pressure, Massey actually used an oil pressure switch to power the gauges and excite the alternator on some tractors when built.

It is a good idea to have an indicator lamp, a resistor, or a diode in the #1 "excite" lead.

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J.Wondergem

12-01-2021 06:36:05




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 Re: A/C Delco Starter Distributor Condensor issues in reply to BlakeABP, 11-30-2021 19:27:45  



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wore out

11-30-2021 20:41:49




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 Re: A/C Delco Starter Distributor Condensor issues in reply to BlakeABP, 11-30-2021 19:27:45  
" I take positive striaght from the positive lug on the alternator to #1 and then #2 goes to a switch on my console"

That's EXACTLY backwards, but still doesn't explain the rough running issue you are dealing with.



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BlakeABP

12-01-2021 05:24:26




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 Re: A/C Delco Starter Distributor Condensor issues in reply to wore out, 11-30-2021 20:41:49  
So i should put power to the number two terminal all the time and the on the number one terminal should i run another circuit from positive with a light in series to excite the alternator? Is that how it would typically be done instead of using a switch?



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