Replace the Flush Head Seal

For bio-inert modules use bio-inert parts only!

When

Tools required

Qty.		p/n	Description
1		8710-0510	Open-end wrench 1/4-5/16 inch
1		8710-2392	4 mm Hex key

Parts required

Qty.		p/n	Description
1		5067-5918	Flush Head Seal 500 µL
1		G5668-60494	Seal 500 µL Bio-inert for bio inert solution

Qty.

p/n

Description

5067-5918

Flush Head Seal 500 µL

G5668-60494

Seal 500 µL Bio-inert

for bio inert solution

Prerequisites

In the Local Controller start the maintenance mode and select Service Position.

OR

In the Agilent Lab Advisor software select Service & Diagnostics in the system screen (Tools) > Maintenance Positions > Change Metering Device , click start and wait until the metering device is in maintenance position.
Remove capillaries and valves from the flush head.
Press and turn the Flush Head a quarter left (bayonet fitting) and detach the metering device from the actuator.
Pull the flush head away from the hydraulic box
Press against the rear side of flush head and turn a quarter left (bayonet fitting) and separate the flush head, head body and the piston.

NOTE
Be careful not to break the piston.
Remove the piston from the head body.
Carefully remove the seal from the tip of the piston.
Reassemble the flush head and the head body (without piston).
Carefully insert the piston with the new metering seal into the flush head assembly.
Reinstall the flush head to the actuator housing.

NOTE
For proper installation, check the correct position of the tag.
Fix the flush head.
Connect the capillaries.

21-Jun-2025