G4220A/B - Agilent Technologies 1290 infinity Technical Note

3
G4220A/B: Remove the front part of the pump head
including pump chamber housing with pump seal and
seal holder. If the seal wash option is installed, also
remove the support ring with wash seal and gasket.
Support ring with
wash seal
Seal wash gasket
Seal holder
including backup
ring
Pump chamber
housing
5
Remove the piston from the piston housing by pushing it
to the rear, then pull it out from the rear.
Pump Head Maintenance (Binary and High Speed Pumps)
4
G7120A, G7104A: Remove the front part of the pump
head including pump chamber housing, distance sheet,
pump seal and seal holder, and support ring with wash
seal and gasket.
6
Check the pump pistons for scratches, grooves, and
dents.
N O T E
Damaged pistons cause micro leaks and will
decrease the lifetime of the seals.
Piston surface
Secondary Pump Head
2
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