When

  • To install a replacement pump head

  • During maintenance of pump head parts

Parts required

Pump head

Tools and additional items required

  • Hexagon wrench, size 6

  • Solvent suitable for your application

Parts affected on the pump head

1423765
Figure: Pump head

No.

Description

1

Pressure sensor cable

2

Solvent line on inlet check valve

3

Pump head screw

4-6

Seal wash lines

7

Capillary connecting pump head and flowmeter

Observe the following

Situation

Description

Reinstallation of pump head

Do not interchange the pump heads. Note the labeling on the pressure sensor cable (A for the left pump head, B for the right pump head).

If you have to reinstall a piston, see Installing the Pistons.

Installation of new pump head (replacement pump head)

New pump heads can be installed in either position when installed for the first time. They have no label on the pressure sensor cable. For easier identification during future maintenance, consider labeling them according to the installation position.

Follow these steps

  1. Check that the pistons are inserted in the pump head as far as they go in.

  2. Insert the pump head into the pump and tighten the pump head screw with the hexagon wrench.

  3. Connect the seal wash lines to the tubing connectors on the pump head.

  4. Connect the capillary that connects the pump head to the flowmeter.

  5. Connect the solvent line to the inlet check valve.

  6. Connect the cable of the pressure sensor to the Pressure connector.

  7. Dock the pistons from either the keypad (SELECT and DOCK buttons) or the ePanel in the chromatography data system.

  8. Wait until docking is complete before proceeding.
    Docking is complete when the pump has stopped and the LED next to the FLOW button stops flashing green for the selected pump head.

  9. Turn off the pump with the main power switch and on again.

  10. Purge the pump using the solvent for your application.

  11. Inspect all flow connections on the pump head for indications of leakage. Tighten leaky connections when the system pressure is down to zero.

  12. Test the seal wash system for leakage. See Testing the Seal Wash System for Leakage.

  13. Depends on the situation:

Situation

Description

Reinstallation of pump head

Test the pump for leakage. Run the script: E04 - Detailed Leak test (Pump).

Installation of new pump head (replacement pump head)

1. Adjust the pressure sensors. Run the script: C05 - Adjust System Pressure Sensors.

2. Test the pump for leakage. Run the script: E04 - Detailed Leak test (Pump).