Thermo Scientific Dionex, Operator'S Manual

Page: 142 / 228

Dionex Integral Systems Operator’s Manual
130
Doc. 065250-06 03/2020
To remove the old main seal from the pump head:
1. Plug the outlet check valve with your finger and then inject deionized water
through the piston opening to fill the head cavity with liquid.
2. While still plugging the check valve,
push the piston into the head. (This
should hydraulically unseat the seal from
the head.)
3. Remove the piston and pull off the seal.
If the main seal is not removed, make
sure the outlet check valve is plugged
tightly when inserting the piston.
If you want, install a 10-32 fitting plug
(P/N 042772) on the outlet check valve. Add more water, make sure the head
contains no air bubbles, and repeat
Step 2 and Step 3 . When you finish,
remove the 10-32 fitting plug, if used.
To install the new main seal:
1. Open the waste valve knob by turning the knob one-half turn
counterclockwise.
2. Before continuing, verify that the O-ring is
installed in the spacer.
3. Lubricate the seal (P/N 069006) and the
pump head opening with a small amount of
isopropyl alcohol to facilitate insertion.
4. Push the piston through the spacer and then
through the new piston seal.
O-Ring
Main Seal
Spacer
Piston