the problem is that the principal pump only send a few flow and it reach only 600psi, (after reseal the pump),, I do check the output line of the pump and when the machine is off, the oil in the output line drop (flange loose) when the machine is running and flange loose, the oil stops to drop.....
i want to check the values pressure in the port , to know if the something wrong in the pump or in any pilot signal.