My Toro Z Master with only 100 hours on it is pushing hydaulic fluid out of the reservoir. It is comming up out of the vent hole in the cap. I called the dealer and he said he'd never seen one do anything like it and he would have to call Toro Technical Support in the morning. I'll go down and check with him this afternoon. In the meantime, anyone no what this could be? BTW: the machene is working fine, the hyraulics are smooth as can be and are making no unusual sounds.