Hi
I have MF50 Gas tractor.
It has two hydraulic valve control levers located behind the gear shift.
one lever is not in use.
Could I replace the top link of the 3 point hitch with a hydraulic cylinder ??
Sure, you can do that...and many have! Do a search for the term "ccm", it's a company that sells one with a built in check valve to keep it from drifting. You can also search the term "htl" (hydraulic top link) and "DPOCV"(dual pilot operated check valve) Surplus Center also has them.