Exchange the Needle Seat
| For biocompatible modules use bio / biocompatible parts only! Do not mix with bio-inert parts. |
When
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Tools required
Qty. | p/n | Description | |
|---|---|---|---|
1 |  | 8710-0510 | Open-end wrench 1/4-5/16 inch |
Parts required
Qty. | p/n | Description | |
|---|---|---|---|
1 | | G4267-87012 | High Pressure Needle Seat, 0.12 mm (PEEK) (for G7167C) OR |
1 | | G7137-87012 | High pressure seat assembly 0.12 mm Biocompatible (for G7137B) |
Prerequisites
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WARNING
Risk of injury by uncovered needle
An uncovered needle is a risk of harm to the operator.
- Do not open the safety lock of the needle assembly
- Be careful working at the z-robot.
- Wear safety goggles, when removing the needle assembly.
In the Local Controller start the maintenance mode and select Change needle/seat function.
OR
In the Agilent Lab Advisor software select Service & Diagnostics in the system screen Maintenance Positions > Change Seat , click Start and wait until the needle assembly is in maintenance position.
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Open the front door.
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Slightly pull (1.) the front clip that holds the needle seat in position. Then carefully lift (2.) the complete leak tube needle assembly from the holder.
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Close the front door.
In the Local Controller close Change needle /seat.
OR
In the Agilent Lab Advisor software Change Seat click Back and wait until the needle assembly is in the needle park position.
For G4767A, end the procedure with a Pressure Test.
For G7167C and G7137B, proceed with the subsequent steps.
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Perform Hydraulic Path Leak Test.
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Perform Sampler Leak Test if needed for troubleshooting in case of Hydraulic Path Leak failure.
NOTE
Always flush the sampler with fresh solvent and perform a Pressure Test before using the Auto Clean or Prime function after exchanging a needle seat.
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