If the vacuum pump and system pipeline leak oil, air or damage, or start the engine and step on the brake pedal, if the supercharger has no noise, it indicates that the vacuum pump is faulty
(1) oil leakage at the end cover. Check whether the tightening torque is enough. If not, tighten it according to the specified torque. Check whether the joint surface of the pump body or the pump cover is deformed. If it is deformed, replace the damaged parts or repair the joint surface. If the sealing ring is damaged, replace the seal
(2) the efficiency of vacuum pump is low, there is noise, and no vacuum suction can be produced. Check whether the clearance between the blade and its groove is too large. If yes, replace the blade, check whether the joint of the flaring pipe is in good condition, and check whether the check valve is not tightened. If necessary, replace the connecting pipe or tighten the check valve according to the specified torque. Check whether the poor lubrication causes the efficiency reduction. If yes, lubricate the lubricating oil passage
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