6V Positive Ground Alt

Plan B would be to install a momentary contact button switch that connects battery voltage to the # 1 regulator blade contact for a moment to excite the alternator after starting the engine.
use a auto parts store $2 replacement regulator plug to connect to the #1 regulator blade. terminal. Your 1 wire regulator will not need the #2 terminal connected to the battery stud to sense voltage,the 1 wire regulator is wired internally to sense voltage without a sense wire. You should only need to push this button once after starting the tractor,as once excited,the alternator will continue to charge even at low rpm.

Plan C,what is the amperage rating of your 1 wire alternator ? A 1 wire alternator with a small 37 amp stator installed will excite at less than half the rpm of a 61 or 72 amp alternator. usuall 37 amps is more than enough for the needs of an antique tractor,so having your alternator shop install a larger 61-or 72 amp stator just makes the alternator much harder to get it charging,as much higher rpm is needed. Maybe all you need to do is have your alternator shop install a 37 amp or smaller stator to fix your problem.

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Gerald J.

Suggest fitting the smallest sheave you can find that will fit the alternator. Keep in mind the alternator rotor must be spun at several times the LA's governed RPM cause it to turn it on. Fortunately once the alternator begins to charge it should continue to do so right down to idle RPM.

Sounds like the simple series ammeter circuit is wired correct, if so and if the ammeter is okay (its almost a short circuit), BOTH its terminals should read hot battery voltage at all times. The unloaded open output voltage dont really tell you all that much, its what voltage it can maintain on the battery once coupled to it.

Id check with the alternator vendor as far as RPM requirements and if its possible to flash it???

John T

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