Waters Xevo TQD Operator's, Overview And Maintenance Manual page 102

To add oil to the roughing pump:
1. Vent and shut down the mass spectrometer (see the instrument's online
Help for details).
2. Use the 8-mm Allen wrench to unscrew and remove the roughing pump's
oil filler plug (see the figure on
3. Using the funnel, add Anderol vacuum oil, type GS 495, into the oil filler
aperture until the oil reaches the oil level sight glass MAX level.
4. Ensure that the O-ring on the oil filler plug is clean and properly seated.
5. Use the 8-mm Allen wrench to fit and tighten the roughing pump's oil
filler plug.
When the oil filler plug is tightened, the plug seals with an O-ring.
Tip:
Compression is controlled by the O-ring groove depth in the plug. Over
tightening does not improve the plug seal; it only makes the plug
difficult to remove later.
After you add oil to the pump, the following situations can occur:
Tip:
• The oil level drops slightly during the first month of operation.
4-26 Maintenance Procedures
The pump oil can be contaminated with analyte
Warning:
accumulated during normal operation. To avoid
contamination by biohazardous or toxic materials, always
wear chemical-resistant, powder-free gloves when adding or
replacing oil.
To avoid burn injuries, take great care while working
Warning:
with the roughing pump; it can be hot.
To maintain pump performance, use only Anderol
Caution:
vacuum oil, type GS 495.
To avoid oil leakage, when fitting the oil filler plug to the
Caution:
roughing pump,
• ensure that the plug is not cross-threaded.
• ensure that the O-ring is not pinched.
• do not over tighten the plug.
page 4-22).