In Reply to: Re: Ford 8N tractor starter won't disengage, Positive Drive type posted by Tim Daley(MI) on March 10, 2020 at 07:42:22:
I really like pictograms you've linked, they're very helpful and clear/easy to comprehend.
It's worth noting that many "essential manuals" you've mentioned are available to freely download (One'll have to search/wade past/through merchandisers selling this information).
I would agree that a float-trickle charger is quite helpful, some are quite reasonably priced (although to be useful, power has to be available), & costing a bit more, are solar battery trickle chargers. Search will be your friend, locating best prices.
Some battery maintainers go a step farther, providing AC frequency riding on top of DC charge value, which can help prevent having to DIY rejuvenate lead acid battery (link). https://www.youtube.com/watch?v=VEnXlZekHD4