A 12 volt system is just reliable as a six, as long as the components are installed properly.
Just hanging an old alternator on a tractor with frayed wiring wont cut it. rewire the tractor. by now the original harness has reached the end of it's useful life. The extra amperage from the alternator will break down the old wire fast.
Also, the alternator has to be mounted properly, at the proper position to the v belt. forget the diode! Simply install a DPDT switch in place of the ignition switch, and provide an accessory terminal. That is the way GM did it, if one studies the schematic.
I have had my super c wired to 12 volts since 1991. I never had one single problem with the electrical system.
choosing the right components, wiring them properly is key. I cannot stress enough that new wire and tight connections is vital.
I also have appreciation for a unmolested 6 volt system. it looks good in show for a tractor to be all original.
To to infer that somehow a PROPERLY INSTALLED 12 volt system is not as reliable as a six volt is pure hogwash! the problems usually come about by not understanding wiring systems, poor connections and old wire.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family’s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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