7 Maintenance
194 July 29, 2013, 715003794 Rev. B
If the separations module’s solvent lines are empty, dry prime the solvent
management system before you wet prime it or start delivering solvents (see
“Dry prime the system” on page 126).
Replace an inlet check valve cartridge
Tip: For information about isolating check valve problems, see Chapter 8.
Required materials
• Wrench, 1/2-inch, open-end
• Wrench, 5/16-inch, open-end
• Replacement check valve cartridge
• Squirt bottle with 100% alcohol (methanol or isopropanol)
• Syringe (in Startup Kit)
To replace an inlet check valve on either piston chamber:
1. In the Other Diagnostics screen, select Motors and Valves.
Requirement: To prevent fluid leakage during check valve replacement,
make sure that the GPV valve is set to the Off position (see “Perform the
motors and valves diagnostic test” on page 230).
2. Loosen the screws that secure the solvent delivery and conditioning
trays, and pull the trays out a few inches to access the check valves (see
the figure “Solvent management system components:” on page 184).
3. Use the 1/2-inch wrench to hold the inlet check valve housing while you
disconnect the inlet check valve compression screw with the 5/16-inch
wrench (see the figure “Inlet check valve:” on page 195).
4. Use the 1/2-inch wrench to disconnect the check valve housing from the
manifold.
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