Tractor is 10 YO Kioti diesel. Always a quick starting motor. Never had any probs with current Dekka 2 yo batt untill it acted like the new battery; that is, it cranked over and started; shortly thereafter I cut it off for about 15 min...then it wouldn't crank again. Just a couple cliks. After sitting for about 30 min, it barely cranked and started.
Charging it didn't help much, batt charger said it was fully charged but....one crank and its done. Bought new battery and the result is as I reported above. Makes sense that if new battery acts pretty much like old one, I have a problem somewhere else. Might have to have it hauled to dealer if I can't find simple solution as I'm not much at mechanics.
I've looked at batt ground cable attachment...still tight. Ground looks clean....will pull and sand terminals and ground connections. No corrosion anywhere. Cable wires to solenoid area appear clean and tight. Will look at those again. I'll have to get someone over to help me test it cranking with volt meter and at same time see if cables get hot.
Thanks a bunch of the help. Once I get it resolved, I'll report what the problem was.