8Maintenance
Replace the Four-Channel Gradient Valve (4CGV)
1260 Infinity II Flexible Pump User Manual 172
Replace the Four-Channel Gradient Valve (4CGV)
Tools required p/n Description
0100-1710 Mounting Tool for Tubing Connections
8710-0899 Screwdriver Pozidrive Shaft
Parts required p/n Description
G7111-67701 Four-Channel Gradient Valve (4CGV)
Preparations
• Switch off pump at the main power switch
• Open the doors
• Use an optional solvent shutoff valve or lift up solvent filters inside solvent bottles for avoiding
leakages
1 Use the mounting tool for removing tubing connections
between the degassing unit and the 4CGV.
2 Remove the inlet weaver, see “Replace the Inlet
Weaver” on page 161.
3 Remove the cover from the 4CGV. 4 Disconnect the 4CGV cable (1), unscrew the two screws
(2) and remove the valve (3).