Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 103 / 248

Replacing the Varian roughing pump’s oil and oil mist filter 5-27
Filling the pump with oil:
1. Use the 8-mm Allen wrench to fit, and tighten the roughing pump’s oil
drain plug.
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.
2. Using the funnel, pour 1 L of Varian GP45 oil into the oil filler aperture.
Tip:
At first, the oil level can be above the sight-glass MAX level.
Nevertheless, it falls to the MAX level or below during the first few days
of operation.
3. Fit and tighten the oil filler plug.
Warning:
The roughing pump components can be contaminated
with analyte accumulated during normal operation. Always wear
chemical-resistant, powder-free gloves when performing this
procedure.
Caution:
To avoid oil leakage when fitting the oil drain plug to the
roughing pump,
• ensure that the O-ring on the pump’s oil drain plug is clean and
properly seated.
• ensure that the plug is not cross-threaded.
• ensure that the O-ring is not pinched.
• do not overtighten the plug.
Caution:
To maintain pump performance, use Varian GP45 oil.
Caution:
To avoid oil leakage when fitting the oil filler plug to the
roughing pump,
• ensure that the O-ring on the pump’s oil drain plug is clean and
properly seated.
• ensure that the plug is not cross-threaded.
• ensure that the O-ring is not pinched.
• do not over tighten the plug.