It sounds to me as if your main hydraulic pump on the tractor has failed as the backhoe is run off its own hydraulic system. I would begin by checking there.
Check out our Guides and Videos page on our Keno Tractors website and we have instructions on how to split your tractor as well as how to adjust your clutch.
Guides and Videos: https://www.kenotractors.com/online-tractor-support-help/
If you have any additional questions or would like to identify your hydraulic pump you can contact me directly by email at tyler@kenotractors.com or by phone at 866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST