Removing the Pump Head - Dual Pump C - Isocratic Pump C - Dual Pump CN - Quaternary Pump C - Quaternary Pump F - Binary Pump C - Binary Pump F - Dual Pump F - Vanquish Pumps C, Pumps F (VC-Pxx, VF-Pxx) Operating Manual - Removing the Pump Head - Maintenance and Service - Pump Head - Replacing the Pump Head - Dual Pump C - Isocratic Pump C - Dual Pump CN - Quaternary Pump C - Quaternary Pump F - Binary Pump C - Binary Pump F - Dual Pump F

Follow these steps

No.	Description
1	Pump head inlet
2	Pump head screw
3	Pump head outlet
4	Seal wash tubing

1. Open the purge valve by turning the valve knob counterclockwise.

2. As required by the pump type:

Pump Type	Action
Binary pump	Select the pump head for which you want to perform the procedure.
Dual pump	Select the pump for which you want to perform the procedure.
Isocratic pump, quaternary pump	Continue with the next step.

3. Undock the pistons either from the keypad or from the Chromeleon software. Wait until undocking is complete before proceeding with the next step.

4. Remove the capillary that connects the pump head to the purge/sensor unit. Disconnect the capillary on both the pump head outlet and the purge/sensor unit.

5. On the pump head, disconnect the following tubing and capillaries:

   • On the pump head inlet, disconnect the tubing.

   • Remove the seal wash lines from the tubing connectors on the pump head. Do not remove the tubing connectors.

6. Binary pump: Unplug the cable of the pressure sensor from the P-WORK connector.

7. Loosen the pump head screw with the hexagon wrench.

8. Hold the pump head with one hand, remove the pump head screw, and then remove the pump head by pulling it toward you.

9. It may happen that the seal wash plate remains in the pump when you remove the pump head. Follow these steps:

1. Insert the spacing tool between the pump head and pump block.
2. Carefully pull the seal wash plate away from the pump block.