Leybold Vacuum Pump RUVAC WAU 1001 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

5.4 Cleaning the Fan Cowl and the Cooling Fins

Ensure all safety information from Section 5.1 is observed

Inspect the slits in the fan cowl for contamination

Inspect the fins on the motor and the pump for contamination

Clean the grid of the fan cowl with a clean brush

Remove any coarse dirt from the fins on the motor and the pump

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

Wipe off any oil residues from the casing

Clean the oil-fill port and reinstall the screw (11/5) using a gasket in perfect condition

Ensure the oil-fill port is sealed air-tight

Check the oil level and condition in the oil level glass and oiler

Correct oil level and condition as required

If the oil is dark, note potential early ageing due to high temperatures

Check oil level at vertical flow (center of oil-level glass when pump is not running)

Check oil level at horizontal flow (6 mm above center of oil-level glass)

Ensure oil level is not too low or too high to avoid lubrication issues

5.3 Oil change/shaft seal housing

Observe all safety information provided in Section 5.1

Unscrew the oil-drain screw (10/3) under the shaft seal housing and drain out the oil

Screw in the oil-drain screw using a gasket in perfect condition

Fill in fresh oil at the oiler (10/1)

Is the oil level for the shaft seal housing visible in the oiler?

Select the current state of the pump

Is the oil level at 1/2 of the height of the oiler when the pump is warm or 1/3 when cold?