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650 Ford Starter solenoid

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John Milby

04-19-2001 03:30:45

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I just acquired a 55' 650 Ford and can't get info on how to hook up the starter solenoid. It has four connects, left(large not marked) front left marked S, front right marked I, and right (large not marked). Which large terminal is for the battery?

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ZANE

04-19-2001 05:38:17

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Re: 650 Ford Starter solenoid in reply to John Milby, 04-19-2001 03:30:45

The solenoid you are trying to use will not work on the 600 tractor if it is still 6 volts because the original solenoid windings are energized when the small post which is made up to ground and is the positive post on the 6 volt system with the safety neutral starter switch. The soleniod you have must be energized by a positive voltage from the positive side of the battery in a system that has 12 volts and the negative post is the ground.

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Mark B (PA)

04-19-2001 05:00:15

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Re: 650 Ford Starter solenoid in reply to John Milby, 04-19-2001 03:30:45

The solenoid on my 640 is the 3 post version, but the battery hookup is the same on the 3 or 4 post solenoid. Post on the right with the yellow wire has the battery cable which leads to the negative post on the battery, for a 6 volt positive ground system. Post on the left goes to the terminal on the starter. HTH

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Claus

04-19-2001 04:09:42

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Re: 650 Ford Starter solenoid in reply to John Milby, 04-19-2001 03:30:45

The large terminal that does NOT make continuity with the "I" (Iginition) terminal is used to connect to the battery. This terminal bypasses the ignition resistor (if one is used) when starting to allow higher current for the coil under starting conditions.
Happy Motoring
Claus

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