5•Service
Doc. 065051-03 1/08 171
3. If you are rebuilding an injection valve installed inside the AS autosampler,
follow the steps below to pull the valve away from the compartment slightly,
for better viewing of the valve parts during the procedure.
a. Remove the drip tray as described in Section 5.5
.
b. Using an Allen wrench, remove the screw on the bracket that attaches the
injection valve to the AS compartment (see Figure 5-37
).
c. Pull the valve forward far enough to allow you to inspect the injection
valve on all sides.
4. Follow the instructions provided in the valve rebuild kit (P/N 057896) to
replace the rotor seal, isolation seal, and stator face.
Notes on replacing the stator screws (the last step in the valve rebuild kit
instructions):
• Before tightening the stator screws, make sure the stator and the stator
ring are squarely aligned and the space between them is uniform all
the way around the valve.
• If you have trouble gripping the stator screws in order to tighten them,
use the Allen wrench held lightly between the thumb and forefinger.
Tighten them until you estimate they are fingertight.
• After finger tightening each screw, tighten each an additional one-half
turn.
5. If you pulled the valve out from the autosampler compartment, slide the valve
back into position in the compartment and reinstall the three bracket screws.
6. Reconnect all liquid lines to the valve. Refer to Figure 5-36
for the valve flow
schematic.
Do not overtighten the stator screws. Tighten them further in small
increments, only if the valve leaks or does not pass qualification.
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