Last time I used the 2030 the alternator light came on dim just as I was putting it away and had idled down for a 2 minute cool down. I am think no biggy, just low rpms.
Yesterday I wanted to finish brush hog mowing at the farm. At start up, the alternator light was on bright, increase rpms and it dimmed.
I shut it down. Cleaned the 4 battery terminals, the 2 ground cables connections, and checked the positive connection at the starter. Then checked connections on the back of the alternator and belt tension. All good. Since this tractor has no electronics and if the lights are off, no electrical loads when running. I started it back up and mowed for 3 hours.
My guess is the 44 year old alternator is the problem, maybe the brushes are worn out? Next guess is the regulator.