After you charge the battery you need to knock the surface charge off. Do this by cranking the tractor and immediately STOP don't let the engine start. Are turn the headlights on for 30 seconds. You could also load the battery with your tester just load it for a few seconds.
The battery voltage should read 12.6/12.7 that's where you need to start diagnostics.
There are more diagnostic steps involved I normally don't jump forward but will in this case. Check the alternator belt my wager its slipping and by your description that would be the number one suspect. Low voltage low amperage battery going dead over time its a dead give away the belt are the dive belt system is suspect.
Engine off push on the alternator fan if it slips on the belt its a must to address that issue first!!!.
Use the gift god gave you, with a few tools the answer to the issue is right in front of you. No need to haul the battery off to a parts store as none have the ability to properly test the battery. Proper testing of the battery is a lost art the tractor was built with a load tester put it to use take that info and apply it. Alternator testing, the tractor came from the factory with its own alternator test stand the best one money can buy. No part store can come close to it : )
This post was edited by Hobo,NC on 06/17/2023 at 05:39 am.
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