7 Maintenance
196 July 29, 2013, 715003794 Rev. B
Requirement: Set the GPV valve to the Solvent A position (see “Perform
the motors and valves diagnostic test” on page 230).
13. If the separations module’s solvent lines are empty, dry prime the
solvent management system before you wet prime or start delivering
solvents (see “Dry prime the system” on page 126).
Replace the in-line filter
The in-line filter provides solvent filtering between the solvent management
system and sample management system. Clean and replace the in-line filter
element when it is the source of elevated backpressure.
Tip: For information about isolating problems in the solvent management
system, see Chapter 8.
Required materials
• Wrenches, 5/8-inch, open-end, two
• Wrench, 5/16-inch, open-end
• Squirt bottle with 100% alcohol (methanol or isopropanol)
• Absorbent tissue
• Replacement in-line filter element
To replace the in-line filter:
1. Use a 5/8-inch wrench to disconnect the compression screw on the left
side of the in-line filter from the inlet housing (see the figure “Replacing
the in-line filter:” on page 197). Use an absorbent tissue to absorb the
small amount of solvent that is likely to leak.
2. Use a 5/8-inch wrench to hold the filter outlet housing while you loosen
the inlet housing with another 5/8-inch wrench.
3. Tip the inlet housing upside down to dislodge the in-line filter element.
4. Wet the replacement in-line filter element with alcohol.
Caution: It is important to maintain proper functioning of the in-line
filter. Damage to downstream components can occur if you replace the
in-line filter with a union, or remove the filter element.
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