Cub Charging Problem

If the charging system is indeed still for 6 volt, the regulator and cut out must have been readjusted for 12 volt use. If the cut out had not been adjusted those contacts would stay closed and quickly drain the battery when not in use,

Before alternators became readily available for conversion use, it was not unusual to just replace the battery, add a resister to the coil, change the light bulbs, and then readjust to regulator to function as a 12 volt system.

The regulators were the weak part of this system. Since they were being operated at twice their designed voltage it was difficult to keep them adjuted properly.

Are you sure? If so, congratulatons, you have a set-up I"ve never encountered before.

Did you do the conversion yourself? If not, can you be sure the 6 volt generator was not replaced by a 12 volt model?

Quote: "The problem is, the battery is not being charged when the tractor is running."

Watch the ammeter. If it shows more than about five amps, the generator is charging the battery; but a six-volt generator is unlikely to properly charge a twelve-volt battery.

Get a voltmeter and check the votage at the battery terminals while the ammeter shows the voltage regulator is allowing the high rate of charge. Seven volts or so? You DO have the original six-volt generator, and need to make a decision about whether to to a REAL twelve-volt conversion or not.

Fourteen volts or so? Some one replaced the six-volt generator with a twelve volt one. You have some other problem, perhaps a bad battery.