1. The oil pump does not start to control the electrical protection or the oil pump motor is damaged. The upper limit of the pressure setting is abnormal. Check the emergency stop, start-stop switch, circuit breaker, AC contactor. Check the motor line group pressure sensor (relay) upper and lower limit setting value adjustment
2. The oil pump does not stop working (for hydraulic systems that work intermittently at the interval pressure). The pressure does not reach the upper limit. The pressure relief of the system causes the pressure to be insufficient. Adjust the pressure interval value, whether there is obvious oil leakage in the pipeline, and the oil suction filter of the oil pump is blocked. Chang or the oil brand number is improper. Judging from the oil return pipe whether it is the main part of the hydraulic station or the peripheral valve and mixing head seal. Pressure
3. High oil temperature, cooler or abnormal cooling water system, pressure relief oil pump, slow injection cycle, too fast, air-cooled heat sink cleaning, unobstructed cooling water circuit, find out the pressure relief point, repair or replace. If the cycle cannot be reduced, consider replacing a larger hydraulic pressure Station or increase forced cooling
4. The noise connecting parts have metal friction or the abnormal oil pump is blocked, the suction filter screen is blocked, and the power is cut off. Manually check the operation of each connection.
5. The pressure can be compensated in place if the pressure is not maintained, and the pressure drops quickly. In addition to the above-mentioned problem of insufficient pressure, do not neglect the damage of the pressure relief accumulator or the lack of nitrogen due to the poor sealing of the one-way valve.