Posted by Charlie Biler x on December 26, 2009 at 16:40:30 from (64.201.85.120):
In Reply to: battery problems posted by tractormiallis on December 26, 2009 at 12:21:14:
tractormiallis, The first thing to do is check the output of the charging system. Take your multimeter and measure the battery voltage at the battery terminals, while the tractor is running. A 12 volt system better have from 14.0 to 14.9 volts. 14.3 volts is the sweet spot. If it is maintaining less voltage, your battery is being slowly killed. Higher voltages decrease your battery's useful life expectancy. A charged twelve volt battery maintains 13.6 volts at rest.
Every time a battery is taken to stone dead zero volts, it loses half of it's remaining cranking output. If you take a 1000CCA battery to zero twice, it only has 250CCAs left.
When you shut down the tractor, remove the regulator to battery post at the regulator. See if there is any sign of a ground at the regulator where the battery terminal was. If you do not get true infinite ohms, repair or replace the regulator. If you have an alternator, there will be about ten milliamp constant drain at rest. This slow discharge will kill a battery in about ten months. A car clock draws more than this anyway. A generator regulator should allow no energy to pass at rest. Master kill switches are what mechanics without electrical knowledge use, to solve problems they can not find.
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