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Pump Head Maintenance (Binary and High Speed Pumps)
2
Primary Pump Head
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.
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.
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