2002 Jinma Lift Arm leaking profusely … did I possibly overfill?

I have heard of hydro oil being pushed out vent tube on some models maybe you should clean it off and then see exactly where it is coming from.  I believe that most tractors suggest that all hydro systems be placed in the fully down position when checking fluid levels . some dipsticks have two marks on them the lower one for tractors without fel  the higher one with fel. Your tractor mech. that will be doing the clutch should help you out.