Waters Xevo G2 QTof Operator's, Overview And Maintenance Manual page 146

6. Remove the metal gasket from the probe tip.
Metal gasket
7. Remove the PEEK union/UNF coupling assembly and capillary from the
probe.
8. Unscrew and remove the knurled collar from the UNF coupling.
PEEK union
9. Remove the knurled collar and conductive sleeve from the capillary.
10. Use the 7-mm wrench to loosen the locknut.
Use the 8-mm wrench, to steady the UNF coupling when loosening
Tip:
the locknut.
5-70 Maintenance Procedures
PEEK union/UNF coupling assembly
Capillary
UNF coupling
Locknut
Conductive sleeve
Knurled collar