Waters Xevo TQ MS, Operator And Maintenance Manual, Page: 68 / 184

4-20 Maintenance Procedures
Replacing the Varian roughing pump oil and oil mist filter
Change the roughing pump oil and oil mist filter annually.
This procedure is not required for an Edwards oil-free roughing pump.
Emptying the roughing pump 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 oil
1. Vent and shut down the mass spectrometer (see the mass spectrometer’s
online Help for details).
2. Allow the roughing pump to cool.
3. Place the container for capturing the used oil under the pump’s drain
plug (see the figure on page 4-18 ).
4. Unscrew and remove the oil filler plug.
5. Use the 8-mm Allen wrench to remove the oil drain plug.
6. Tip the pump toward the drain plug aperture and allow the oil to drain
completely into the container.
Warning:
The roughing pump oil can be contaminated with
analyte accumulated during normal operation. Always
wear chemical-resistant, powder-free gloves when adding
or replacing oil.
Warning:
To avoid burn injuries, take great care while working
with the roughing pump: it can be hot.