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For the new equipment hydraulic cnc pipe end forming machine, the oil problem has little impact on the noise generation, because the newly added hydraulic oil is in line with the requirements, and the noise may be caused by insufficient oil volume resulting in the sound of air inhaled by the oil pump, or the motor oil pump itself is faulty. However, for the sudden abnormal noise of the equipment used for a long time, it is necessary to check the oil product, clean the oil tank and the oil filter, and solve the abnormal noise pro... more