Exchange the Needle Assembly

When

The needle is visibly damaged.
Leaks or blockages are observed.
The limit for the needle interaction EMF counter is exceeded.
The needle needs to be replaced as part of the yearly maintenance.

Tools required

Qty.		p/n	Description
1		8710-0510	Open-end wrench 1/4-5/16 inch
1		5182-3466	Torx screwdriver T10

Parts required

Qty.	p/n	Description
1	G7129-87200	Needle assembly, 1260 Vialsampler (for G7129-87017 needle seat) for G7129-87017 needle seat OR
1	G7129-87201	Needle assembly, 1290 Vialsampler (for G7129-87012 needle seat) for G7129-87012 needle seat OR
1	G7129-87202	Needle assembly, slotted, 1260 Vialsampler (for high injection volumes)

Qty.

p/n

Description

G7129-87200

Needle assembly, 1260 Vialsampler (for G7129-87017 needle seat)

for G7129-87017 needle seat

G7129-87201

Needle assembly, 1290 Vialsampler (for G7129-87012 needle seat)

for G7129-87012 needle seat

G7129-87202

Needle assembly, slotted, 1260 Vialsampler (for high injection volumes)

Prerequisites

Finish any pending acquisition job.
Stop the flow at the pump and remove the solvent lines from the eluent bottles to avoid spilling solvent.
Close the shutoff valves at the pump if available.

WARNING

Toxic, flammable and hazardous solvents, samples and reagents

The handling of solvents, samples and reagents can hold health and safety risks.

When working with these substances observe appropriate safety procedures (for example by wearing goggles, safety gloves and protective clothing) as described in the material handling and safety data sheet supplied by the vendor, and follow good laboratory practice.

WARNING

Risk of injury by uncovered needle

An uncovered needle is a risk of harm to the operator.

Do not open the safety cover of the needle station during normal operation.
Wear safety goggles and safety gloves when removing the needle assembly.

NOTE

It is recommended to always exchange the needle assembly and the needle seat at the same time to prevent premature leakage.

NOTE

When the instrument setup has changed, configure the new setup in the online view of the Chromatographic Data System. See The Vialsampler user interface.

In the Agilent Lab Advisor software select Service & Diagnostics > Maintenance Positions > Change Needle, Loop and Seat , click Start and wait until the needle assembly is in maintenance position.

OR: In the Local Controller start the maintenance mode and select Change Needle, Loop and Seat function.
In Lab Advisor use Next to move the needle in the down position.
Align the needle tip with the seat and ensure that they are concentric. If needed, carefully bend the needle into the right position with your fingers.
In Lab Advisor use Next to lift the needle slowly into the up position.
In Lab Advisor, select Next to move the needle into the needle seat and then Back to finish the maintenance procedure.

OR: In the Local Controller, select Continue to move the needle into the needle seat and then Exit to finish the maintenance procedure.
Perform a System Pressure Test.

21-Jun-2025