How to repair hydraulic brake system vacuum pump failure

Hydraulic Brake System Vacuum pump and system pipe leaks, leaks, damages, starts diesel engine, depresses brake pedal. If turbocharger has no "pop, pop ..." sound, the vacuum system is faulty.
(1) Cover leakage. Check tightening torque is sufficient, if not enough, according to the provisions of torque tighten; Check the pump or pump cover junction surface is deformed, if deformed, replace the damaged parts or repair joints; if the seal is damaged, replace the seal.
(2) vacuum pump inefficient, noisy, can not produce vacuum suction. Check the vacuum pump blade and its gap between the tank is too large, if yes, replace the blade; check the pipe joints are good, one-way valve is tightened, if necessary, change the connection pipe or tighten the required torque tightening valve. Check if the poor lubrication caused by reduced efficiency, if so, clean up the lubricating oil Road.