When required
If internally leaking (backflow)
Tools required
Wrench 14 mm
Pair of Tweezers
Parts required
Active inlet valve G1312-60010 (complete assembly)
Valve cartridge 5062-8562

  1. Remove the front cover.
  2. Unplug the active inlet valve cable from the connector.
  3. Disconnect the solvent inlet tube at the inlet valve (be aware that solvent may leak out of the tube due to hydrostatic flow).
  4. Unscrew the adapter from the active inlet valve.
  5. Using a 14 mm wrench loosen the active inlet valve and remove the valve from pump head.
  6. Insert the new valve into the pump head. Using the 14 mm wrench turn the nut until it is hand tight.
  7. Position the valve so that the solvent inlet tube connection points towards the front.
  8. Using the 14 mm wrench tighten the nut by turning the valve in its final position (not more than a quarter turn).
  9. Reconnect the adapter at the active inlet valve.
  10. Reconnect the solvent inlet tube to the adapter. Reconnect the active inlet valve cable to the connector in the Z-panel.
  11. Reinstall the front cover.
  12. After an exchange of the valve it may take several ml of pumping with the solvent 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.