Waters Xevo TQ-S Operator's, Overview And Maintenance Manual page 120

4 Maintenance Procedures
Warning:
toxic materials, always wear chemical-resistant, powder-free
gloves when adding or replacing oil. The roughing pump oil can be
contaminated with analyte accumulated during normal operation.
Warning:
with the roughing pumps: they can be hot.
To drain the roughing pumps' oil:
1. Place the container for catching used oil under the pump's drain plug
(see the figure on
2. Use the 12-mm Allen wrench to unscrew and remove the roughing
pump's oil filler plug.
3. Use the 12-mm Allen wrench to remove the oil drain plug.
4. Tip the pump toward the drain plug aperture, and allow the oil to drain
completely into the container.
5. Dispose of the roughing pump oil in accordance with local environmental
regulations.
6. Ensure that the O-ring on the oil drain plug is clean and properly seated.
Caution:
roughing pump,
• ensure that the plug is not cross threaded;
• ensure that the O-ring is not pinched;
• do not overtighten the plug.
7. Use the 12-mm Allen wrench to refit the oil drain plug.
When the plug is tightened, it seals against an O-ring. Compression
Tip:
is controlled by the O-ring groove depth in the plug. Increased torque does
not improve the plug seal; it only makes the plug difficult to remove later.
120 February 28, 2014, 715002212 Rev. C
To avoid personal contamination with biohazards or
To avoid burn injuries, take great care while working
page 114).
To avoid spreading contamination, dispose of
Warning:
roughing pump oil according to local environmental
regulations. The oil can be contaminated with biohazards or
toxic materials.
To avoid oil leakage when fitting the oil drain plug to the