Leybold Vacuum Pump RUVAC WA 501 EU

5.4 Cleaning the Fan Cowl and the Cooling Fins

Ensure all safety information from Section 5.1 is observed

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

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 if it was warm during operation

Wear protective gloves to protect against aggressive residues in the oil

Use the oil-drain facility as recommended

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

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

5.6 Cleaning the Pumping Chamber

Ensure all safety precautions from Section 5.1 are observed

Remove the two connecting lines

Choose method to remove contaminants

During cleaning, were the impellers turned only by hand?

Ensure no loosened deposits remain in the pump

After cleaning, do the impellers move freely and without resistance when turned by hand?

Verify that the Roots pump does not need disassembly