I opened the Sany when hydraulic grader walking haltingly.
This is what you say in fault judgment method, to have little talent and less learning can help you, not to say, ha ha,,
if not up to the pressure, with 80% pump has a relationship, there is the oil inlet filter, there is no blockage, variable-speed torque converter on the valve, because now most of the grader is used in hydraulic torque converter, considering the transmission valve the pressure value and there is no blocking phenomenon, there is a variable valve spring spring, if broken would cause unstable pressure, if the transmission valve is also all right, leaving the hydraulic coupler and change the internal problems of converter!!
You'd better check the gear lever have hanging in place of the grader, there is a direct drive lever, most pull the lever force transmission is good, but the installation of cable limited, and vice versa, if the lever can be hung in place, not lost files, then to consider the variable speed pump first, look at the cab of the pressure gauge pointer in the normal value,
