Leybold Vacuum Pump RUVAC WA 2001 US

5.7 Cleaning the Valve of the Pressure Balance Line

Observe all safety information provided in Section 5.1

Remove the screws and take off the cover (12/1) with O-ring (12/2)

Remove the valve disk (12/6) with O-rings (12/5) and (12/7)

Check if the bushing (12/3) is damaged and replace if necessary

Clean all parts or replace them if necessary

Reassemble in the reverse sequence

Check the O-rings for leak-tightness and replace if found faulty

Check for signs of malfunctioning shaft seals

Diagnosis — inner shaft seal fault

Is the oil level in the oiler dropping without oil appearing under the shaft seal housing?

Switch off the pump immediately if inner shaft seal fault is diagnosed

Diagnosis — outer shaft seal fault

Is the oil level in the oiler dropping with oil appearing under the shaft seal housing?

Collect the oil which drips out under the motor to prevent slipping

Have the pump repaired if outer shaft seal fault is diagnosed

Use oil-drain facility for safety and simplicity

Unscrew the oil-drain screws (11/2) or (11/1) and the oil-fill screw (11/4) to drain the oil

Clean the sealing surface and reinstall the oil-drain screw using a perfect condition gasket

Wipe off any oil residues from the casing

Consult Sections 1.3 and 1.4 for oil quantities and ordering data

Observe all safety information provided in Section 5.1

Switch off the pump and vent to atmospheric pressure before removing any plugs

Ensure the pump has cooled down to avoid burns from high temperatures

Wear protective gloves to protect against aggressive residues in the oil

Use the oil-drain facility for safety and simplicity

Unscrew the oil-drain screws (11/2) or (11/1) and the oil-fill screw (11/4) to drain the oil

Clean the sealing surface and reinstall the oil-drain screw using a gasket in perfect condition

Ensure all safety precautions from Section 5.1 are followed

Remove the dirt trap from the intake flange

Rinse the dirt trap using a suitable solvent

Thoroughly dry the dirt trap with compressed air

Replace the dirt trap if it is damaged