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Tractor Talk Discussion Forum

Fordson 12 volt con, kit

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Fabio Ferraro

04-17-2007 18:31:10




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Hi, if i put a 12 volt alternator kit on my fordson tractor would i have to change the starter since the tractor runs with the positive of the battery to the ground. I know a alternator grounds by bolting it to the engine so how will that work with the old starter. Thanks.




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Oldmax

04-18-2007 04:49:44




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 Re: Fordson 12 volt con, kit in reply to Fabio Ferraro, 04-17-2007 18:31:10  
Most of the older starters With "Field/Armature"
windings will turn the same direction reguardless of plarity that is hooked to them . The only way you can change rotation is to change dircetion of current flow in one of the windings Fields or Armature not both. I have done this to make Motors
for a winch from a 56 Ford starter "or like" using four starter solonids to reverse the current
through the armature while keeping the same through the fields . you can use a 6 volt on 12 volts I have seen them last for years .

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Keith-OR

04-17-2007 21:56:20




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 Pictures Fordson Alt Bracket in reply to Fabio Ferraro, 04-17-2007 18:31:10  
Fabio, here are the pictures I promised you last nite of the bracket I made for my Fordson Power Major...HTH

Keith & Shawn

third party image

third party image

third party image

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Bus Driver

04-18-2007 04:08:56




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 Re: Pictures Fordson Alt Bracket in reply to Keith-OR, 04-17-2007 21:56:20  
A good solid mount. I like it.



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Keith-OR

04-18-2007 09:01:44




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 Re: Pictures Fordson Alt Bracket in reply to Bus Driver, 04-18-2007 04:08:56  
Thanks Bus Driver, the only problem is, is that I sold the tractor 4 years ago and now all it does is sit out in the weather getting no use..:>(

Hasn't been started but a couple of times in the last year.

Keith & Shawn



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John T

04-17-2007 18:42:58




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 Re: Fordson 12 volt con, kit in reply to Fabio Ferraro, 04-17-2007 18:31:10  
Unless the alternator is a special, they are almost alllll lll Negative ground. If its a coil ignition instead of a mag, it (coils primary polarity) should be matched to the ground configuration and if you use an ammeter its polarity sensitive n needs wired correct or else it would read bass ackwards. As Bob noted the starter will still turn the same direction regardless of battery polarity.

John T

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Bob

04-17-2007 18:33:57




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 Re: Fordson 12 volt con, kit in reply to Fabio Ferraro, 04-17-2007 18:31:10  
The only starters that are battery-polarity sensitive are certain MODERN units that use a permanent magnet field. NO polarity worries with your's.



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