Posted by John T on December 14, 2011 at 12:03:47 from (173.243.181.15):
In Reply to: 6 volt generator posted by slivs on December 14, 2011 at 10:34:07:
If the genny case/frame is grounded and you apply battery voltage to its ARM post, it will spin like the DC motor it effectively is.
The purpose of a Cutout Relay (between battery/ammeter and gennys ARM post) is to OPEN the connection between the Battery/Ammeter and the Gennys ARM post when the tractor is shut down, otherwise the battery will discharge and the genny spin or overheat if the belts tight not letting it turn.
If that relay were to stick closed such that the relay did NOT open, the genny would spin (or try if belt dont stop it) If the tractor isnt wired correct and theres hot voltage on that ARM post, it will again try to spin.
If its a two wire simple Cutout Relay the BAT terminal wires to the ammeter (if it has one) while the other GEN/ARM terminal wires to the gennys ARM post. If its a 3 or 4 terminal Voltage Regulator it still has the cutout relay, BAT to ammeter GEN/ARM still to genny.
They make solid state diode types of cutout relays and they are polarity sensitive and have to be wired right to match battery polarity to work correctly!!!!!!!!!!!!
Check wiring,,,,,,,,,Check if its a solid state cutout if its wired right ,,,,,,,,,If it is wired correct and its a mechanical relay, check if the relay is stuck closed
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