Waters Xevo TQD, Руководство оператора, обзор и техническое обслуживание

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4-100 Maintenance Procedures
Tip:
When the oil drain plug is tightened, the plug seals with an O-ring.
Compression 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.
11. Using the funnel, pour all the oil from the 1-L container into the oil filler
aperture.
12. Wait a few minutes, and then recheck the oil level.
13. Ensure that the O-ring on the oil filler plug is clean and properly seated.
14. Use the 8-mm Allen wrench to refit the oil filler plug.
15. Gas ballast the roughing pump (see page 4-22 ).
Tip:
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 the pump runs for 12 to 48 hours, a few drops of oil often
appear near the filler plug. Excess oil around the lip of the filler plug
runs down and drips off the pump once the pump reaches operating
temperature.
• When the pump begins to run at normal operating temperature,
spilled oil smells slightly.
Replacing the roughing pump’s oil demister element
Replace the roughing pump’s oil demister element annually.
Caution:
To maintain pump performance, use Anderol vacuum oil,
type GS 495.
Caution:
Observe these precautions to avoid oil leakage when
fitting the oil filler plug to the roughing pump:
• Ensure that the plug is not cross-threaded.
• Ensure that the O-ring is not pinched.
• Do not overtighten the plug.