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Farmall & IHC Tractors Discussion Forum
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farmall push pull switch

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D Parten

03-23-2008 18:26:53




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What is the difference between a two prong push pull on off switch and a push pull on off magneto switch?




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NDS

03-24-2008 07:51:47




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
Like others have said original type switches are available but be ready for a shock when you price them.



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Andy Motteberg

03-23-2008 19:09:25




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
The 2 prong switch is used on tractors with a distributor ignition, a Magneto uses a 1 prong switch that grounds the magneto terminal when you push in the switch which stops the engine. You can use a 2 prong switch on a magneto if you take one terminal and wire it to ground, but you need to pull out the switch to stop the engine and push it in to run the engine. If you want your restoration to be original, use a 2 prong switch on a distributor ignition or a 1 prong switch on a magneto ignition.

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Jim in Ma.

03-23-2008 18:48:24




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
If it's for a restoration you can get it from case-ih - you want the one with one prong = I put a key switch on mine from napa I asker for a switch that is open when on. I hope this helps.



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leroy in ne

03-23-2008 18:39:17




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
one terminal magneto switch is a grounding switch. it stops the engine by shorting the mag. to ground. two terminal switch is for battery ignition. it switches battery voltage to ignition coil, a two terminal switch can be used on mag ignition by wiring one terminal to ground and the other to magneto, however a mag switch with one terminal can never be used with battery ignition.



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Bob

03-23-2008 18:38:16




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
Mag switch GROUNDS terminal to case when button is depressed.

Two terminal switch... two terminals are insulated from each other and ground, and contact is "made" between the two terminals when the switch knob is popped "up".



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dave guest

03-23-2008 18:34:47




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 Re: farmall push pull switch in reply to D Parten, 03-23-2008 18:26:53  
You didn't specify what tractor but magneto switch is usually to ground the mag for stopping. It is open or infinity unless you push it down, then it is closed or conducting to stop.



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D Parten

03-23-2008 18:38:35




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 Re: farmall push pull switch in reply to dave guest, 03-23-2008 18:34:47  
Sorry I didnt specify, switch is to be used on a 49 cub I am restoring with a J4 magneto.



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