122 Agilent 1290 Infinity II Flexible Pump User Manual
7 Maintenance
Pump Head Procedures
Assemble the Primary and Secondary Pump Head
This procedure describes how to assemble the secondary pump head using
the pump head alignment tool. Assembling the primary pump head can be
done accordingly. The secondary pump head has the heat exchanger
capillary, which must fit into the openings of the alignment tool, whereas
the primary pump head does not have a heat exchanger.
See chapter "Parts" for details.
When Before installing the pump head.
Tools required p/n Description
Pump head alignment tool
G4220-20012 Torque wrench 2 – 25 Nm
G4220-20013 4 mm hex bit
G4220-20041 Bit Torx 10x25 mm
G4220-20015 Adapter ¼ in square to hex
01018-23702 Insert tool
Parts required p/n Description
0905-1719 Metering seal 100 µL
0905-1718 Wash Seal PE
5062-2484 Gasket, seal wash (pack of 6)
Damage of the pump piston
The pump piston is very sensitive to shearing forces from the side.
➔ Use the alignment piston of the pump head alignment tool for the alignment
procedure described below.
Wrong orientation of pins on support ring
Assembling the pump head without paying attention to the correct orientation of the
pins on the support ring can lead to leaks or damage of the piston and pump head.
➔ Observe pins on the support ring, which help assembling the parts of the pump head
in the correct orientation.
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