To determine if the alternator is GOOD, "full-field" it (for a short period of time) by pulling the connector off of the back, and jumpering the terminal labeled "F" to the large output stud on the back of the alternator. This will make it charge at it's max output.
Before doing the jumper thing, check the voltage at the large output stud. Without the alternator charging, it will be around 12.5 Volts. When you install the jumper, if the alternator is working, the output voltage will quickly come up to 16 to 18 Volts, or even more.
Use an ANALOG meter, as many digital meters are "freaked out" by the "noisy" electriacl systems on these old machines.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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