Leybold Vacuum Pump RUVAC WAU 151 EU

Ensure all safety precautions are observed

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 perfect condition gasket

Wipe off any oil residues from the casing

Consult Sections 1.3 and 1.4 for oil quantities and ordering data

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

5.4 Cleaning the Fan Cowl and the Cooling Fins

Inspect the fan cowl and cooling fins for contamination

Clean the fan cowl grid with a clean brush

Remove coarse dirt from the fins

Check for signs of malfunctioning shaft seals

Diagnosis — inner shaft seal fault

Is the oil level dropping with no oil under the shaft seal housing?

Switch off the pump immediately if inner shaft seal is faulty

Repair the pump if inner shaft seal is faulty

Diagnosis — outer shaft seal fault

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

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

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 guard 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