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Nat 
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Joined: 22 Sep 2009
Location: Lexington NC
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 Topic: D-10
Posted: 01 Aug 2022 at 6:09pm |
I have an early D-10. It is currently 12V Positive ground. I am assuming that it is charging since I haven't had to recharge the battery and I have started it many many times. Is it supposed to be negative ground and if so have do I make it negative ground
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Nat
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Larry in NC
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Joined: 09 Feb 2016
Location: NC
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Posted: 01 Aug 2022 at 6:17pm |
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Early D10's were 6 volt positive ground. After serial number 3501, 12 volt positive ground. If you have the original 6 volt generator, it will not charge a 12 volt battery. If the generator has been replaced by an alternator, most require a negative ground.
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WF owner
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Joined: 12 May 2013
Location: Bombay NY
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Posted: 01 Aug 2022 at 7:46pm |
If it's charging, why would you want to change anything? They can be changed, but unless you have a reason, why mess with it?
A lot of older vehicles were positive ground. When they started using radios with transistors and using alternators, instead of generators, negative ground became the norm. Unless you are going to put a radio on it (or some other electronic attachment) or, as Larry said, change to an alternator, there is really no reason to change it to negative ground.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 01 Aug 2022 at 7:59pm |
probably suppose to be POSITIVE GROUND... Not much reason to change to negative ground unless you let others borrow it and they might put battery charger on backwards..
To change to NEGATIVE ground is fairly simple... Starter does not care ... might have to switch wires on the amp meter....might have to FLASH the voltage regulator to get it to see the ground change.
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Like them all, but love the "B"s.
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Jim.ME
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Joined: 19 Nov 2016
Location: Maine
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Posted: 02 Aug 2022 at 6:00am |
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To be correct, the generator is what gets polarized (flashed) to a given ground, not the voltage regulator. The act of polarizing (flashing) the generator can be done at the generator itself or the regulator terminals for ease of access, leading people say they flashed the regulator. The generator produces power; the regulator only controls the generator output. Some voltage regulators were/are ground specific. If a regulator is labelled as ground specific it may need to be changed out if the generator polarity is changed.
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WF owner
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Joined: 12 May 2013
Location: Bombay NY
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Posted: 02 Aug 2022 at 6:21am |
 steve(ill) wrote:
... To change to NEGATIVE ground is fairly simple... Starter does not care ... might have to switch wires on the amp meter....might have to FLASH the voltage regulator to get it to see the ground change.
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You will also have to change the small wires on the top of the coil. On positive ground, the power wire from the switch will go to the negative (-) side of the coil and the positive (+) terminal on the coil will connect to the distributor.
If you change to negative ground, you will reverse the wires.
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Nat
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Joined: 22 Sep 2009
Location: Lexington NC
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Posted: 02 Aug 2022 at 6:35am |
Since it is supposed to be Positive ground I will leave it alone., I just thought it was wrong
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Nat
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ac45dave
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Joined: 23 May 2015
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Posted: 02 Aug 2022 at 7:25am |
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Any Allis tractor before D21 and the 100 series was pos ground.D21 and the 100 series was the start of alternators and neg ground.
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54 wd-45gas ; 56 wd-45d N/F w/fact p/s ; 63 d-17 sIII N/F gas ; 60 D14 N/F ; 67 d-17 sIV N/F gas ; 63D15 sII W/F; 39rc#667 ; 2021 massey 4710 fwa ; gravely 2 wheel tractors
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steve(ill)
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Posted: 02 Aug 2022 at 8:50am |
To be correct, the generator is what gets polarized (flashed) to a given ground, not the voltage regulator.
Your right Jim... I miss spoke... and i know better !
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Like them all, but love the "B"s.
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Jim.ME
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Posted: 02 Aug 2022 at 9:33am |
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I'm sure you do, and I understand what you were intending, I just wanted to be sure those not familiar with the process understood what flashing is actually doing to what.
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