4 Maintenance Procedures
190 January 11, 2016, 715004599 Rev. B
Replacing the roughing pump’s oil demister element
Replace the roughing pump’s oil demister element annually.
Note: This procedure is not required for an Edwards oil-free roughing pump.
Required materials
• Chemical-resistant, powder-free gloves
• 6-mm Allen wrench
• 10-mm wrench
To remove the roughing pump oil demister element:
1. Vent and shut down the instrument (see the mass spectrometer’s online Help for
details).
2. Allow the roughing pump to cool.
3. Use the 6-mm Allen wrench to remove the 4 bolts securing the exhaust flange to the
roughing pump.
Warning: To avoid personal contamination with biohazards or toxic
materials, and to avoid spreading contamination to uncontaminated
surfaces, wear clean, chemical-resistant, powder-free gloves when
adding or replacing oil. The roughing pump oil can be irritant, or
contaminated with biohazardous or toxic analyte accumulated during
normal operation.
Warning: To avoid burn injuries, take great care while working with
the roughing pump; it can be hot.
Exhaust flange
Securing bolt
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