You're probably correct that your tractor has a leaking heater hose.
I am being told hoses run under the cab floor to roughly where your heels would be and then steel lines to heater core which is directly under the seat. Oh boy! Anybody ever had a core go bad in these 7000 series? I took the filters out from behind the seat and ran the fan and the air coming out of there doesnt smell of antifreeze. I am hoping that is a good sign the core may in fact be ok. Here's hoping it is. I plan to pull the floor and access the hoses(hopefully) probably tomorrow.