1290 Infinity Quaternary Pump User Manual 137
Maintenance
9
Replacing the Outlet Valve
Replacing the Outlet Valve
When If Outlet valve is defective.
Tools required p/n Description
8710-0510 Wrench open 1/4 — 5/16 inch
8710-2603 Spanner-double open ended 12X14 mm Chrome
G4220-20012 Torque wrench 2 – 25 Nm
G4220-20041 Bit Torx 10x25 mm
Parts required p/n Description
G4220-60028 Outlet valve
(primary pump head)
G4220-20020 Internal gold seal for Outlet Valve
Preparations • Switch off pump at the main power switch
• Remove the front cover
• Use an optional solvent shutoff valve or lift up solvent filters inside solvent bottles for avoiding
leakages
1 Open the 2.5 mm hex screw at the top of the primary
pump head, which fixes the connection capillary of the
heat exchanger. Then lift up the capillary and remove it
from the primary pump head.
2 A gold seal between outlet valve and heat exchanger
capillary is used for a tight connection. The seal can be
replaced separately as needed.
Hex screw
Gold seal
Heat exchanger
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