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This will expose the sample flow chamber and the old seals that ride the metering
rod (ID No. 25), which should be treated with great care to prevent bending or
scratching.
3. Pull the sample flow chamber assembly (ID No. 13) off the metering rod. Remove
the two seals (ID No. 14). This may requiring pushing from the opposite side using a
rod smaller than 1/8-inch diameter.
4. Place new seals on the sample flow chamber assembly. Press the chamber and seals
back over the metering rod.
5. Place the actuation section in position on the heater section’s headpiece.
6. Use the union coupling spacer to ensure that the union coupling is properly aligned
with the heater section’s headpiece.
7. Use the union coupling wrench to retighten the union coupling over the heater
section.
8. Restart the sample flow. The GC can now be returned to service.
Operation and maintenance
102