Agilent Technologies 1290 infinity - G4204 A

65
Pump Head Maintenance (Quaternary and Flexible Pumps)
3
Primary Pump Head
3
G4204A: Remove the front part of the pump head
including pump chamber housing with pump seal and
support ring. If the seal wash option is installed, also
remove the seal holder including backup ring, and the
gasket.
4 G7120A, G7104A: Remove the front part of the pump
head including pump chamber housing with pump seal,
distance sheet, support ring, seal holder including
backup ring, and the gasket.
5 Remove the piston from the piston housing by pushing it
to the rear, then pull it out from the rear.
6 Check the pump pistons for scratches, grooves, and
dents.
NOTE
Damaged pistons cause micro leaks and will
decrease the lifetime of the seals.
Pump chamber
housing
Seal holder including
backup ring
Seal wash gasket
Support ring
with wash seal
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Piston surface