Update. I used the machine for a hour after fixing the hydraulic leak, the next morning I went out to feel for oil. Now the machine is leaking diesel from the tank, turns out the tank is prone to cracking the dealer said. I told the dealer I am not surprised at all because the tank is only mounted on the bottom. When I drive on a gravel road in high speed the tank shakes back and forth, prob a inch each direction! Turns out the tank is not covered under warranty.... New machine 150 hours!
So I have to fix another leak and fabricate something so the tank is more supported.