I am the proud owner of a free,slightly used and or abused 199? Toro zero turn mower. I know it needs a head gasket which I think is a easy fix but I also know it needs a right hand side hydro pump. At first glance the pump looked simple to get to and remove but once I started removing some parts it proved otherwise. I still can't figure out how to remove the pump short of dismantling the entire mower. What is the procedure for removal of Eaton hydro? The model # is 74140 and the serial # is 490250. Surely one of you guys have tackled this problem before?