Posted by JDEM on February 12, 2017 at 09:13:54 from (70.194.20.80):
In Reply to: Amp question posted by notjustair on February 12, 2017 at 06:12:19:
If you already have an 80-amp plus alternator, going bigger would be silly. That unless you are lighting up a football stadium. I have no idea what your total current draw is. One note though. Deere tends to derate the alternators by installing large drive-pulleys. So if the alternator is otherwise working as it should, a smaller pulley like used on a car might be all you need.
As it is now with the large Deere 3.2" pulley, it should be working like this. 800 engine RPM - 28 amps, 1200 engine RPM - 52 amps, 2000 engine PM - 72 amps
If you put the standard 2.6" automotive pulley on, it works like this: 800 engine RPM - 43 amps, 1200 engine RPM - 65 amps, 2000 engine PM - 80 amps
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