I have a small leak on the left hydro pump. It appears to be coming from the top of the pump where the end cap meets the housing. Nothing major, just enough to put a few drips on the garage floor. The mower operates as normal at this time. They make a overhaul seal kit for these, is this something that one can do without a dealer? or should I get this into a shop for their review. If I do attempt this rebuild, is there anything special I need to do before I fire this back up, or is it similar to slowly working the air out of the lines on a hydro oil change. Thanks for your help.