Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 99 / 248

Replacing the Varian roughing pump’s oil and oil mist filter 5-23
7. Connect the power cords for the mass spectrometer and roughing pump
to the main power source.
8. Start the mass spectrometer (see page 2-2 ).
Tips:
After you add oil to the pump, the following situations can occur:
• The oil level drops slightly during the first month of operation.
• The oil changes color (darkens) over time.
• After running the pump for 12 to 48 hours, a few drops of oil
sometimes appear near the filler plug. Excess oil around the lip of
the filler plug will run down and drips off the pump once the pump
reaches operating temperature.
• When the pump begins to run at normal operating temperature,
spilled oil becomes slightly odorous.
Replacing the Varian roughing pump’s oil and oil mist
filter
Replace the roughing pump oil and oil mist filter annually.
Note:
This procedure is not required for an Edwards oil-free roughing pump.
Emptying the roughing pump’s oil
Required materials
• Chemical-resistant, powder-free gloves
• 8-mm Allen wrench
• Container to catch used oil
• Lint-free cloth
To empty the roughing pump’s oil:
1. Vent and shut down the mass spectrometer. See the mass spectrometer’s
online Help for details.
2. Disconnect the power cords for the mass spectrometer and roughing
pump from the main power source.