136 1290 Infinity Quaternary Pump User Manual
9 Maintenance
Replacing the Inlet Valve
Replacing the Inlet Valve
When If Inlet valve is defective.
Tools required p/n Description
Wrench, 14 mm
G4220-20012 Torque wrench 2 – 25 Nm
Parts required p/n Description
G4204-60022 Inlet Valve 1290 Infinity Quaternary Pump
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
• Remove the inlet weaver, see “Replacing the Inlet Weaver” on page 134
1 With a 14 mm wrench, unscrew the inlet valve and
remove it.
2 Install the new inlet valve and tighten it using a torque
wrench with a 14 mm bit set to 10 Nm.
Next Steps:
3 Insert the inlet weaver, see “Replacing the Inlet Weaver” on page 134.
4 Purge the system to remove air.
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