12
2 Pump Head Maintenance (Binary and High Speed Pumps)
Disassembling the Pump Head
Disassembling the Pump Head
When If parts inside the pump head need to be replaced
Tools required p/n Description
G4220-20012 Torque wrench 2 – 25 Nm
G4220-20013 4 mm hex bit
G4220-20014 2.5 mm Hex Bit
G4220-20015 Adapter ¼ in square to hex
8710-0510 Wrench open 1/4 — 5/16 inch
Damage of the pump piston
Removing pump heads in a position other than the maintenance position can damage
the pump piston.
➔ Before switching off the pump, bring it to the maintenance position.
Damage of pump drives
The pump drive can be damaged if the pump initializes after switching it on without
having the pump head installed properly.
➔ Use the Lab Advisor maintenance procedure for replacing pump heads.
➔ Install the pump head correctly before switching on the pump.
This procedure shows how to remove a pump head assembly from an Infinity I Binary
Pump module (G4220A/B).
Removing pump head assemblies from an Infinity II High Speed Pump (G7120A) will be
done in the same way.
This procedure describes how to remove the pump head assembly of channel A. The same
steps apply for channel B.
The primary pump head does not have a heat exchanger. Seal wash parts are optional for
both pump heads (G4220A/B only).
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