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Old 02-27-2014, 06:13 PM   #21
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Update!

Finally replaced both AGM 8D's with regular lead acid 4D's. Charger was fine, my mechanic went to check hoses, belts and clamps, by chance touched port engine alternator and it was very hot... i.e shorted. Probable cause to damage or ruin the AGM's so that might had been the culprit. Rebuilt the alternator for $125.
New batteries, oil, coolant, thermostats and belts.... Ready to put more hours on the old 3208's
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Old 02-27-2014, 06:17 PM   #22
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Sorry, I have to correct something on my previous post, just learned that the caterpillars do not have thermostats, they are temperature regulators!
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Old 02-28-2014, 06:13 AM   #23
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>very hot... i.e shorted.<

If the alt was hot all that was most likely shorted was the internal V regulator.

Leading the field wire out will allow the use of a MARINE 3 or 4 stage V regulator .

Far shorter charge times underway.
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