Agilent Technologies 1200 Series Manual page 82

7
Maintenance
Simple Repairs
3 Disconnect the solvent inlet tube at the inlet valve (be aware that solvent
4 Unscrew the adapter from the active inlet valve.
5 Using a 14 mm wrench loosen the active inlet valve and remove the valve
6 Using a pair of tweezers remove the valve cartridge from the actuator
7 Before inserting the new valve cartridge clean the area in the actuator
8 Insert a new valve cartridge into the actuator assembly (make sure the
9 Insert the valve into the pump head. Using the 14 mm wrench turn the nut
10 Position the valve so that the solvent inlet tube connection points towards
11 Using the 14 mm wrench tighten the nut by turning the valve in its final
12 Reconnect the adapter at the active inlet valve.
13 Reconnect the solvent inlet tube to the adapter. Reconnect the active inlet
14 Reinstall the front cover.
After an exchange of the valve cartridge it may take several ml of pumping with the solvent
N O T E
used in the current application, before the flow stabilizes at a %-ripple as low as it used to
be when the system was still working properly.
82
may leak out of the tube due to hydrostatic flow).
from pump head.
assembly.
assembly. Flush the cartridge area thoroughly with alcohol.
valve cartridge is fully inserted into the actuator assembly).
until it is hand tight.
the front.
position (not more than a quarter turn).
valve cable to the connector in the Z-panel.
1200 Series Quarternary Pump User Manual