5 • Service
Doc. 065215-02 9/09
85
6. Remove the spacer and piston and verify
that the seal is flush with the surface of the
pump head.
7. Verify that the O-ring is installed in the
spacer.
To reinstall the head and piston:
Dionex recommends reinstalling the head and piston as a single assembly, so that
the piston centers itself onto the magnetic follower.
1. Hold the assembled spacer and guide with the drain tube aligned vertically
and press the spacer into the head until it is flush with the indented surface of
the head.
2. Insert the piston so that about 1/4 inch of
the shaft is exposed. This ensures that the
magnet in the follower picks up the piston.
(The follower is the cylinder that holds the
piston in place as it moves in and out of the
pump head assembly.)
3. Reinstall the head and piston assembly;
tighten the screws evenly.
