Exchange the Wash Port Assembly

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.

Release the spring loaded pin.

Lift the flapper out of the bracket. Be careful not to squeeze the wash tubing.

Install the new wash port by mounting it in the respective brackets of the needle station housing. The pin must be latched on the housing. Check the movement of the flapping mechanism. Check if the tension on the spring is high enough to move the wash port back into position in time. When everything seems to be in order, move the wash port into the service 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.

Select Back to finish the procedure.

Purge the wash port. Check if solvent is delivered from the peristaltic pump.

Perform a System Pressure Test.