7 Maintenance
190 July 29, 2013, 715003794 Rev. B
8. If the separations module does not have solvent in the lines, perform a
dry prime to draw solvent into the plunger cavity before you perform a
wet prime or start delivery of solvents (see “Prime the solvent
management system” on page 107).
Replace the seal-wash assembly seals
For information about isolating problems in the solvent management system,
see Chapter 8.
This procedure involves replacing these parts:
•Seal-wash face seal
• Two tube seals
• Plunger wash seal
Required materials
• Seal insertion tool (startup kit)
• Seal removal tool (part number WAT039803)
• Replacement seals
• Squirt bottle containing 100% alcohol (methanol or isopropanol)
• Syringe (startup kit)
• Plastic tweezers
To replace the seal-wash assembly seals:
1. Remove the seal-wash assembly (see “Remove the head, seal-wash
assembly, and plunger” on page 185).
2. Use the plastic end of the seal removal tool to remove the plunger
wash seal from its seat, repeating the procedure for each of the tube
seals (see the figure “Seal-wash assembly seals:” on page 191).
3. Use the plastic tweezers to remove the seal-wash face seal.
Caution: To avoid damaging the sealing surfaces, use the seal removal
tool. Do not use a sharp tool to remove or install seals.
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