Common factors for low pressure in the hydraulic press system The low pressure of the hydraulic press system may be caused by a variety of reasons. The following are some common factors: The wear of the pump of a failed hydraulic pump: After the hydraulic pump is used for a long time, internal components such as plungers, cylinders, distribution plates, etc. will be worn, resulting in a decrease in the volume efficiency of the pump and a decrease in the output flow, which will make the system pressure unable to be raised. Pump drive problems: Failure of the drive motor of the hydraulic pump, slipping of the transmission belt or damage to the coupling will cause the pump to fail to operate normally or the speed is insufficient, which will affect the pump's output flow and pressure. The set pressure of the relief valve is too low: the set pressure of the relief valve determines the maximum working pressure of the system. If the set value is too low, the system pressure cannot be raised to the required value. The relief valve spool is stuck in the open position due to impurities, oil stains or other reasons, which will cause hydraulic oil to flow directly back to the oil tank through the relief valve, resulting in the system pressure not being established. Hydraulic oil problem insufficient oil: hydraulic pressure in the oil tank