ActionStep
Unscrew the plastic nut of the upper check valve using an adjustable wrench, and gently
lift off the upper check valve.
3
Replace the upper check valve with a new one.4
Tighten the nut until fully finger-tight and then use the adjustable wrench to tighten a
further 180 degrees.
5
Place the new metal ring onto the new upper check valve, and screw the new purge
valve.
6
Unscrew the two white plastic screws located below each pump head. Pull the plastic
connectors to the sides to release the inlet manifold.
7
Unscrew the lower check valve using an adjustable wrench.8
ÄKTA pure User Manual 29119969 AB 333
7 Maintenance
7.8 Replacement procedures
7.8.9 Replace the pump head check valves
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