The faults frequently encountered in the operation of asphalt insulation pumps are as follows: First, the asphalt insulation pump does not discharge oil or discharge less oil. 1. The direction of rotation is incorrect; 2. The valve on the inlet and outlet pipe is not open; 3. Air leakage in each joint surface of the oil suction pipe; 4. The suction pipe is not immersed in the oil; 5. Inhalation height exceeds the rule value; 6. The pump enters and exits the pipeline and condenses the external medium such as filter and cutting; 7. The temperature of the liquid is low and the viscosity of the medium is increased. Second, the abnormal vibration and noise of the asphalt insulation pump : 1. The pump and the motor device have different axes; 2. Inhalation of the intubation or filter infarction or media condensation; 3. The portion of the suction pipe whose diameter is smaller than the regular diameter or has a variable diameter on the oil suction pipe; 4. Air leakage into the oil pipeline and each joint surface; 5. The base unit of the pump is not stable. Third, asphalt insulation pump motor power overload reasons: 1. The practice of the pump, the pressure exceeds the rule value; 2. The hard particles are stuck in the pump; 3. The discharge valve is closed or opened in place; 4. The liquid temperature is low and the viscosity is increased; 5. Gears and bearing sleeves are severely worn or bitten.  See more: http://