94 Agilent 6500 Series Q-TOF LC/MS Maintenance Guide
2Maintenance
To replace the APCI nebulizer needle
11 Hold the needle holder steady with a 3-mm wrench and tighten the union
one-quarter to one-half turn to compress the ferrule.
Figure 39 Tightening the union to compress the ferrule
12 Tighten the locknut against the union.
13 Pull carefully on the needle to ensure the needle is held firmly in place.
14 Replace locknut and washer.
15 Insert the needle into the nebulizer shaft.
16 Adjust the APCI needle position before reinstalling the nebulizer in the
spray chamber.
Take care when inserting the needle. The tapered end of the needle must pass through
the restrictions in the nebulizer shaft. The tip of the needle can be damaged if
excessive force is applied.
Record this procedure in the Maintenance Logbook.
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