The REAL test of a charging system is to what voltage the battery (an actual LOAD) rises when its running at fast RPM. The open unloaded output of a genny, although it should certainly be higher then 6 volts, dont tell you near as much as what happens when a real load is applied..Id expect a good 6 volt battery to read somewhere around 6.3 volts when the tractor is just setting, but when shes running at fast RPM Id expect it to rise to at least 6.5 to 7 or so subject to RPM and battery and genny condition.
Did you Polarize the genny prior to start up?? You should have.. Try that
If you run my Troubleshooting Procedure below, including the ground the field test in Para 5, it should help diagnose the problem. Polarize the genny,,,,,,insure belt is tight,,,,,,insure BOTH the genny and VR or Cutout relay are well grounded,,,,,,,,try to temporarily ground the gennys Field (FLD Post) when shes running,,,,,,,see if she charges then?????
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