Get a 3010 3020 4010 or 4020 as a project. Much better money return and damn good tractors with lots of parts available the 710 not so much as it's an oddball.
To be honest DON'T buy it. It was built in Germany to European low standards. Terrible hydraulics and so on. John deere stepped in then the 2120 and 3130 was born.
We have an old 4010 jd that kinda does the same thing as it has a secondary booster pump serving the main pump that runs only when the clutch is released. We only notice it when the oil is low. Hope this helps.
Check to see if the radiator is leaking or seeping along the top or bottom metal ends or caps. We had to replace the radiator one time because solder holding it together broke from vibration. The pto could be either the pto clutch starting to go or tyranny needs an oil change maybe. Hope this...
My suggestion is get a 4020 john deere. Sure it's old but fairly bulletproof. We've been farming over 100years with 2 bought new and rebuilt the engines only once in that time. No tyranny issues and very few other problems. Newer tractors just have a lot of unnecessary electronics that's always...
The biggest thing is using heavy black 9000ft plastic twine. Anything smaller the knotter has a hard time grabbing and knotting. Other settings need an old school mechanic is your best bet. Hope this helps.
His best bet is to dump that tractor as fast as he can. The 7820 and 7830 are real problem children. Keep an eye on the aluminum radiator as well. The 7800 and 7810 are basically bulletproof with some getting over 20000 hours trouble free. I have a 7800 with about 7000hrs and the only had a...