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Allis Chalmers Discussion Forum

D17 Solenoid

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Madison Orange

01-10-2010 15:30:43

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Is this solenoid ground or 12v activated?

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El Toro

01-14-2010 06:42:51

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 15:30:43  
third party image

This one should work. Hal

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Brian Jasper co. Ia

01-11-2010 17:10:50

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 15:30:43  
I've never heard of a starter solenoid that grounded through the starter itself, unless it was part of the starter, and shifted the gear along with switching the motor. (like a GM starter) Just get a Ford starter solenoid and leave the 2nd small terminal un connected. The bracket needs to have a good ground connection for it to work.

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Madison Orange

01-10-2010 17:17:49

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 15:30:43  
Thanks- it's clear now.

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01-10-2010 15:42:30

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 15:30:43  
Most all are a 1 wire solenoid, that picks up ground from the starter. If you can't find a 1 wire solenoid, use a 2 wire, and run one terminal to ground. If you are asking if the system is positive or negative ground, remember that all 6 volts are + ground, and some 12V are + ground. Find the serial # of the tractor, on the carb side of the torque tube, just back of the motor. It is on the very front edge of the bell housing. Once you post the serial#, we can tell you whetherit is supposed to be + or - ground.

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Madison Orange

01-10-2010 17:14:30

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 Re: D17 Solenoid in reply to DiyDave, 01-10-2010 15:42:30  
It"s a 12v system. I was talking with Ford guys and that uses the 2-wire.

I was unsure, after speaking with them, if Allis used a ground activated means on the solenoid or a hot from the battery.

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Jeff Z.

01-10-2010 19:12:19

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 17:14:30  
The Ford style is a 4 wire type 12 volt activated. @ large terminals and 2 small terminals. Some call it a 2 wire.
One large terminal to the battery and one large terminal to the starter. One small terminal {S} activates the solenoid from the key and the other terminal bypasses the ballast resistor when used to give a full 12 volts to the coil while starting the engine.
If you are using a 12 volt coil with internal resistance that does not require a ballast resistor you don't need to use the 4th terminal {I} on the solenoid.

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Jeff Z.

01-10-2010 15:34:42

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 Re: D17 Solenoid in reply to Madison Orange, 01-10-2010 15:30:43  
The one on mine is 12 volt activated.
There are ground activated also but you probably don't have one of them.
If it is ground activated just touch a 12v wire to the little terminal and it will spark really good. Dead short.

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