1290 Infinity Quaternary Pump User Manual 173
Maintenance
9
Assembling the Pump Head
Assembling the Pump Head
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 PE Seal
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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