Gardner Denver Vacuum Pump 1392B-01

Is the oil level above the fill mark?

Is the oil level even with the fill mark and no contaminants suspected?

Run the pump for 15 minutes to warm up the oil

Turn off motor for the vacuum pump

Drain the oil into a clear plastic container

Turn off the power to the diffusion pump

Disconnect the power plug after the diffusion pump has cooled

Disconnect the inlet and foreline connections without scratching or damaging sealing surfaces

Remove the cold cap and jet assembly

Check the refrigerant level in the flask

Is the refrigerant add tube unobstructed?

Has the pressure in the vacuum system increased?

Disconnect the trap from the system

Rinse off the condensate with a suitable solvent in a fume hood

Is there any change in oil color or level?

Change the oil if there are changes in color or level

Remove screws securing the old seal

Pry the old seal loose with a screwdriver or similar wedge

Discard the old seal and its gasket

Inspect all surfaces for damage