Posted by rvirgil_KS on June 15, 2020 at 07:30:05 from (64.250.54.168):
In Reply to: 49 farmall c posted by Hobbs49 on June 14, 2020 at 18:58:02:
It was "originally" 6 volt positive ground. If properly configured either 6 or 12 volt, positive or negative ground would now be "correct" for operation.
"How does a positive ground system work because that stumps me. You don’t actually ground the positive battery terminal to the chassis or do you?"
Yes. That is what "positive ground" means...the positive terminal of battery is tied to frame ground, and negative terminal is the hot post. With "negative ground" the negative terminal of the battery is tied to frame ground and the positive terminal is the hot post. Either configuration will work equally well with a generator if regulator is matched polarity and the generator is polarized accordingly.
Unless specially modified common alternators are negative ground.
The battery does not have a "ground" post, it has a positive and a negative post. (Parts stores do not sell "positive ground batteries" or "negative ground batteries". "Ground" is a characteristic of the circuit, not the battery. All polarity sensitive devices must match the circuit configuration.
Switches and lights are not polarity sensitive.
Starter will turn same direction either polarity. With negative ground, the - post of coil goes to side of distributor, with positive ground the + post of coil goes to side of distributor.
Coil itself will work either polarity, but if coil polarity is reversed the spark plug polarity is reversed
Positive and negative ground is like right hand and left hand threads on a bolt. With the bolts the nut turns in opposite directions, with ground configuration current flows through the circuit in opposite directions.
One advantage to keeping an alternator is that you won't have to deal with reported poor and erratic quality of today's generator regulators.
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