152 1290 Infinity Quaternary Pump User Manual
9 Maintenance
Replacing the Pump Head
Replacing the Pump Head
When For preventive maintenance or in case of problems with the pump performance
Tools required p/n Description
G4220-20012 Torque wrench 2 – 25 Nm
G4220-20013 4 mm hex bit
G4220-20015 Adapter ¼ in square to hex
Parts required p/n Description
G4204-60200 1290 Infinity Quaternary Pump Head Assembly with Seal Wash Option
G4204-60400 1290 Infinity Quaternary Pump Head Assembly without Seal Wash Option
Preparations • Switch off pump at the main power switch
• Remove the front cover
• Use an optional solvent shutoff valve or lift up solvent filters inside solvent bottles for avoiding
leakages
Limitation of life time
The pump head assembly is an exchange part which cannot be reassembled with
standard tools. Disassembling the pump head will strongly limit its life time.
➔ Do not disassemble the pump head assembly.
Damage of connections
Disassembling the flow connection between the two pump heads of the pump head
assembly (solvent channel) can damage the connection and cause leaks.
➔ Do not disconnect the flow connection between the pump heads.
Damage of internal parts
➔ Do not apply a strong force to the screws of the pump head.
➔ Use a torque hex key for that purpose.
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