Waters GCT Premier Operator's Manual page 235

16. Fit and tighten the two screws that secure the two threaded support
rods to the ion block.
17. Fit and tighten the four screws that secure the ion block assembly to the
inner source assembly brass support.
18. Insert the spring into the ion block support tube.
19. Fit the inner source assembly to the source handle.
20. Use a hex (Allen) key to fit and tighten the two bolts at the base of the
inner source assembly.
21. Fit the ion exit plate.
See also: To remove the ion exit plate: on page 10-22.
EI/CI inner source maintenance 10-31