To full field test it, at the regulator, unplug the harness, put a jumper from F to 3.
With the engine revved up, it should go to full charge. Just test it, don't leave it for more than a few seconds.
If the alternator proves to be bad, now would be a good time to upgrade to an internal regulator alternator. Probably be cheaper and easier to find. Requires a harness plug and minor wiring mods, easy!
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
... [Read Article]
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1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
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