Dear RTR, If you have two individual coils of wire and contacts inside the Device we will call a Voltage Regulator (VR) it is a VR. If it has only one, it is a cutout relay. Assuming a VR, (which consiste of a cutout relay and a voltage regulating relay in one tin box)the spring you replaced is probably on the cutout relay. This spring is designed to prevent the contacts associated with it from closing if the gen is not charging above battery volts. It connects the Gen armature with the Battery through the amp meter. If it is closed when the gen is not turning, or turning too slowly to make enough voltage to charge the battery, the battery will discharge into the gen, depleating the battery rapidly. When the gen is turning rapidly enough (1/2 throttle or more) the gen voltage exceeds the bat voltage and the battery will be charged. When the gen then slows down (or stops) the gen will be producing insufficient voltage, and the cutout will sense the reversed current flow and open, preventing battery drain. The Voltage regulation relay contacts are not connected to the cutout at all!! They have a common ground with the VR frame, but nothing else. The voltage relay coils are connected to the cutout to get charging voltage. The Voltage relay controls the grounding of the field coils in the gen. The more direct the ground the more voltage is produced. when it is stopped, the ground is direct. When it is running fast enough to charge, the voltage applied to its coil will vibrate the points open and closed like a buzzer to limit the average voltage to the preset battery voltage. In the case of your VR, it is 7.2 (or close to that) volts. What to do! I would not use the 8 volt battery. it is way not needed on a Cub. A 6 volt will allow the charging system to function as designed, and not require modifying the VR voltage relay to make more volts. I would also believe that the spring you had come off, and bent the tab to replace has dramatically changed the settings of the cutout. This can be adjusted with the tab on that spring. It should allow the gen (with a fully charged 6v battery) running at 3/4 throttle. To pull the contacts closed at a voltage of about 6.5. and open the contacts when the gen voltage drops to about 6.2 or very close. If the tractor is idled down to lowest speed, the amp meter should momentarily drop below 5 amps discharge, then flip back to 2 to 3 amps discharge. (lights off) when the RPM is increased, the Amp gauge will suddenly jump to charge. THis is a tickelish adjustment, with tweaking required, and few experts left in the trade to do it correctly. A very good Auto electric company can set it up if they have the battery, Regulator, and Gen. (or the whole tractor) The cover must be on the VR when the testing is being done as the cover changes the magnetism and must be accounted for when assuming it is correct. Purchasing a new VR and 6 v battery might be a least hair pulling situation. Jim
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