ICS-3000 Ion Chromatography System
270 Doc. 065031-04 1/08
e. The seal wash seal is now partially installed. To complete the seal
installation, place the retainer in the seal wash body and use the
large flat-blade screwdriver to tighten the retainer.
f. Place the new O-ring (P/N 040695) on the seal wash body.
NOTE When replacing a piston seal, always replace
the O-ring, also. This will prevent leaks.
2. Remove the 10-32 fitting plugs from the pump head.
3. Insert the piston through the seal wash assembly, and then through the
new piston seal (P/N 064946).
4. Make sure the piston seal is centered.
5. Rinse the piston seal with isopropyl alcohol (IPA) or dip it into a
container of IPA. (The seal is easier to install when it is moist.)
6. Place the front of the pump head, flat side down, on a clean work
surface.
Make sure the open side of the piston seal faces away from the
retainer for the seal wash seal.
7. Place the components on the pump head and gently press the housing
until the piston seal snaps into place.
9.5.6 Reinstalling the Piston and Pump Head
1. Slide the piston partway into the pump head; approximately 6 mm
(1/4 in) of the sapphire part of the piston should extend from the head.
2. Place the pump head back on the pump.
3. Reinstall the screws in the pump head. Using the 3.0 mm hex key
(P/N 062338), tighten the screws just until they come into contact
If the piston seal is not centered, applying pressure to it in Step 7 will
damage the seal and make it unusable.
Do not use a sharp tool (such as tweezers) to install the piston seal.
This will scratch the seal and the inside of the pump housing; these
scratches will prevent a proper seal and cause leakage.
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