1290 Infinity II High-Speed Pumps User Manual 154
8Maintenance
Replace the Inlet Valve (G7120A)
Replace the Inlet Valve (G7120A)
When
If Inlet valve is defective.
Tools required p/n Description
Wrench, 14 mm
5067-5688 Torque wrench 1 – 25 Nm with 14 mm wrench
Parts required p/n Description
G4220-60022 Inlet valve
(primary pump head)
For best performance, lifetime and to avoid leaks, use a torque wrench set to
approx. 10 Nm for fixing the inlet valve.
1 Close the shutoff valves to avoid solvent leaks. 2 Unscrew the tubing at the inlet valve.
3 With a 14 mm wrench, unscrew the inlet valve and
remove it.
4 Install inlet valve and tighten it at approx. 10 Nm with a
torque wrench (14 mm).