In Reply to: Generator posted by Theo Morris on August 28, 2018 at 12:19:22:
Measure voltage across the two battery terminals with engine off, and again with engine running. Anything between 6.5 and 7.0 volts is probably right, as long as the voltage is slightly higher with the tractor running. Gauge plus to battery plus, minus to minus.
What you see on the amp gauge may be normal.
If the battery is fully charged, and the tractor starts right up, amp gauge may not show much (if any) amps of charging current. The battery may have already been charged more than the tractor system is set-up to maintain. If you have headlights, flipping them on with the tractor running the amp gauge should show a momentary wiggle to negative, that immediately comes back to where it was. This shows the system reacted properly to the additional load. The ignition circuit draws so little current (none when the points are open) that you may not even see a wiggle on the amp gauge when the ignition is turned on or off.
If you still think the generator is not charging, before doing anything else, polarize the generator.