Recently reached the 50 hour mark on new L4060. Dealer said that with regard to hydraulic fluid only a filter change was required not the oil. I wondered about leakage when removing the filters and was told there would be some but not a lot. I replaced the HST filter and there was some leakage but not a lot. Upon removing the second larger filter I was nearly drowned in hydraulic fluid as it gushed around the loosened filter. By the time I was finished I had lost almost 8 litres. Comments?