Waters Xevo TQD Overview And Maintenance Manual page 136

4 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 seal onto the ion block blanking plug.
Requirement:
7. Fit the blanking plug onto 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 the tool to fully tighten
the plug.
Notice:
do not bend or twist them when fitting the assembly to the ion
block.
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 of dirt and debris.
If contamination is present, use 1:1 methanol/water, applied to a
Tip:
lint-free cloth, to carefully clean the grooves.
12. Fit the cover seal onto the ion block, ensuring that it is correctly seated.
Requirement:
13. Fit the cone gas O-ring onto the ion block, ensuring that it is correctly
seated.
Requirement:
14. If the old isolation valve O-ring has been disposed of, soak a new O-ring
in isopropyl alcohol for a few minutes.
Rationale:
the isolation valve.
15. Fit the O-ring onto the isolation valve.
136 March 14, 2014, 715004387 Rev. B
Fit a new seal if the old one was discarded.
To avoid damaging the heater cartridge assembly wires,
Fit a new seal if the old one was discarded.
Fit a new O-ring if the old one was discarded.
Doing so lubricates the O-ring and aids fitting the O-ring to