Re: Farmall H 12 Volt Conversion.

Posted by Bob M on March 16, 2006 at 10:06:59 from (151.190.254.108):

In Reply to: Farmall H 12 Volt Conversion. posted by Bunchs33 on March 16, 2006 at 08:54:01:

Like Jim notes below, none the original H tractors used a solenoid in the starter circuit. Rather a mechanical pushbutton starter switch - whose location varied somewhat over the years - is used. However it's not unusual to find an H with a solenoid added later (mine has one...)

If yours indeed does have a 6 volt solenoid, it's good idea to replace it with a 12 volt. (Feeding 12 volts into a 6 volt solenoid may cause it to overheat and/or bang itself to death internally)

When wiring the solenoid up, simply connect the wire from the starter pushbutton to the solenoid "S" terminal.

You can leave the solenoid "I" terminal empty. It is provided on some 12 volt systems to bypass the ballast resistor and increase voltage to the coil while cranking. However it's really only needed on older (60's era) cars with high compression V8 engine. My experience is the ballast coil bypass is completely unnecessary on low compression tractor motors...

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