I had a Super W-6 that had the same problem. Normally, I am a purist and will not switch to 12 volts and I don't like to do generator/alternator swaps. In my opinion, it spoils the original look of the tractor. So, out of pure stubbornness, here is what I did:
-Replaced the Super W-6 starter with a WD-6 starter which is 12 volts so it avoids the harsh engagement of using a 6 volt starter with a 12 volt battery.
-Removed the Super W-6 generator, removed the pulley and end plates from the generator. I installed these on a WD-6 generator and then re-installed the WD-6 generator on my Super W-6.
-Replaced the Super W-6 ignition coil with a 12 volt coil from a W-400D.
-Replaced the Super W-6 light bulbs with 12 volt bulbs.
-Swap the 6 volt battery for a 12 volt battery.
This wasn't difficult to do if you have the right parts tractor and a little bit of mechanical/electrical aptitude. It would be the most expensive 12 volts upgrade if you had to buy all of the parts. The end result was fantastic. A tractor that looked original, exempt for the bigger WD-6 starter and the 12 volt battery. It would start easily at -15F without the block heater being plugged in.
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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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