HP 5890 SERIES II Service Manual page 49

9. Remove two nuts securing the flow module to
the mainframe (one next to the pressure gauge,
and one at the lower edge of the module).
10. Once the flow module is clear of the instrument,
replace the flow control component desired.
When connecting lines and fittings, ensure
that all o- rings are properly installed.
11. Install the flow module in the instrument.
12. Connect the plumbing removed in step 8.
13. Restore all gas supplies.
14. Leak check all installed fittings.
15. If the system is leak- free, install the left side panel and secure using two screws.
16. Restore power to the instrument.
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FLOW MODULE BRACKET (TYPICAL)
SVC 3- 6