1290 Infinity Quaternary Pump User Manual 165
Maintenance
9
Disassembling the Secondary Pump Head
3
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 Remove the piston from the piston housing by pushing it
to the rear, then pull it out from the rear.
5 Check the pump pistons for scratches, grooves and dents
when changing the piston seals.
Damaged pistons cause micro leaks and will decrease
the lifetime of the seals.
6
Use the steel side of the insert tool for removing the
pump seal from the pump chamber housing.
Do not use the pump piston for that purpose, as this
can break it!
Pump chamber
housing
Seal holder
including backup
ring
Seal wash gasket
Support ring with
wash seal
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