Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 132 / 248

5-56 Maintenance Procedures
5. Use the combined 2.5-mm Allen wrench and cone extraction tool to
tighten the captive screw securing each extraction cone retainer clip to
the ion block.
6. Fit the blanking plug O-ring (a new one, if you disposed of the old
O-ring) to the ion block blanking plug.
7. Fit the blanking plug to the ion block and finger-tighten it.
8. Insert the combined 2.5-mm Allen wrench and cone extraction tool
through the hole in the blanking plug and use it to fully tighten the plug.
9. Using the needle-nose pliers to gently grasp the heat-shrink tubing on
the heater cartridge assembly, slide the assembly and the PEEK
terminal block into the ion block.
10. Use the combined 2.5-mm Allen wrench and cone extraction tool to
tighten the captive PEEK terminal block securing screw.
11. Ensure that the grooves for the cover seal, cone gas O-ring, and isolation
valve O-ring are free from dirt and debris.
Tip:
If contamination is present, use 1:1 methanol/water, applied to a
lint-free cloth, to carefully clean the grooves.
12. Fit the cover seal (a new one, if you disposed of the old cover seal) to the
ion block, ensuring that it is correctly seated.
13. Fit the cone gas O-ring (a new one, if you disposed of the old O-ring) to
the ion block, ensuring that it is correctly seated.
14. Fit the O-ring to the isolation valve.
Tip:
If you use a new O-ring, first soak it for several minutes in isopropyl
alcohol, so that it better fits the isolation valve.
15. Fit the isolation valve to the ion block assembly so that it is in the closed
position.
16. Fit the ion block cover plate to the ion block assembly, and then use the
combined 2.5-mm Allen wrench and cone extraction tool to tighten the 2
ion block cover plate captive securing screws.
Caution:
To avoid damaging the heater cartridge assembly wires,
do not bend or twist them when fitting the assembly to the ion
block.