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Ollie, The output of a generator increases if it turns faster and/or you pump more current through its Field windings. Therefore, at higher RPM I would expect it to put out the max amps HOWEVER that can all be tempered n controlled by the Voltage Regulator as its function is indeed to control n regulate the gennys output which it does by regulating the Field winding current. Increasing amps as RPM increases is exactly what Id expect it to do and failure to maintain a positive net charge (ammeter reads - discharge) at slow idle with lights on is also very typical. If the gennys field were accidentally always dead grounded (bad VR or a short somewhere) it would always be producing the max current but would still increase charge as RPM increased. That 30 amps sounds a lil high and I would expect that right after a start up but then it should taper down to less amps as the battery becomes charged UNLESS the VR is bad or the fields always grounded (stuck VR relay or wiring short etc) In the event it like ALWAYS STAYS AT 30 AMPS and ifffff fffff the battery is okay (a bad battery might always draw high amps) Id say the battery could overcharge and maybe boil over n outgas excessively sooooo o keep an eye on the electrolyte level and if any acid boils over or if theres a lot of gas escaping IT COULD RUIN THE BATTERY. If the charge backs off after (dont stay at 30 amps constantly) a while I think the system is okay buttttt ttttt if it stays at 30 amps and boils over and outgasses badly Id be checking the Voltage Regulator and for any shorts in the field circuit cuz the regulation process isnt doing its job. Id expect a good battery to read 6.3 volts setting idle, but if the tractor is at RPM and the charging system all works it should rise to around 6.5 to the 7 volt or so range if the VR is working properly. Also some of those ammeters arent all that accurate or yours may be messed up so you might not even have a problem if the battery isnt showing signs of overcharging i.e. if it aint broke dont fix it lol Let us know what you find John T
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