Remove t he 3 screws on the pump housing.Repair of the W 140 vacuum pump with a burned-out motor consists in replacing the electric motor. To remove the graphite pump casing from the JOHNSON motor, you need to unscrew 3 screws, remove the top cover of the pump, the pump stator ring, remove the graphite plates from the pump rotor.Separate the bottom of the graphite pump from the base of the housing here.
