Leybold Vacuum Pump RUVAC WAU 2001 US

5.4 Cleaning the Fan Cowl and the Cooling Fins

Inspect the fan cowl and cooling fins

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 before proceeding

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

Check the oil level in the oil level glass

Check the condition of the oil in the oil level glass

Check the oil level in the oiler

Check the condition of the oil in the oiler

Is the oil light-brown in color?

Is the oil dark, indicating early ageing?

Check the oil level at vertical flow when the pump is not running

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 the inner shaft seal is faulty

Repair the pump if the inner shaft seal is faulty

Diagnosis — outer shaft seal fault

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

Continue operating the pump if oil loss is slight and oil is topped up regularly

5.6 Cleaning the Pumping Chamber

Observe all safety information provided in Section 5.1

Remove the two connecting lines

Choose method to remove contaminants

Turn the impellers by hand during cleaning

Ensure loosened deposits do not remain in the pump

Check the pump by slowly turning the impellers by hand