Dionex AutoTrace 280 Operator’s Manual
108
Doc. 065330-05 03/2020
Install the New Rotor
1. Note the groove on one side of the new rotor. Hold the rotor with the groove
facing you and with the groove oriented down. (This orientation ensures that
the groove connects the center port of the stator with the waste port.) Align
the three tabs on the rotor with the three cutouts in the metal cup, and then
press the rotor firmly into place.
NOTE When correctly installed, the surface of the rotor is
nearly flush with the edges of the metal cup.
2. Reinstall the spacer ring.
3. To reinstall the old stator or install a new stator (P/N 072593): Align the two
small holes on the underside of the stator with the two alignment pins on
either side of the metal cup, and then press the stator into place.
4. Replace the hex screws on the front of the valve and tighten the hex screws
evenly. Tighten the rotor until it bottoms out on the spacer ring. The rotor is
spring-loaded for tension.
Complete the Procedure
To verify that the valve works properly, run the12-Port Valve Test diagnostic
method (#28), followed by the Benchmark Test diagnostic method (#30) (see
NOTE Do not run the 12-Port Valve Test unless all solvent lines
have been primed.
5.13 Replacing the 12-Port Valve Stator
Replace the stator in the 12-port valve if the valve continues to leak after the rotor
is replaced or if the ports in the stator become blocked. If you suspect that the
ports are blocked, use a syringe to attempt to force water through each port.
The replacement procedure for the stator is the same as for the rotor, except that
all of the fittings are reinstalled onto the new stator. For details, see
Parts and Tools Needed
•
7/64-in hex wrench
•
12-port valve stator (P/N 072593)
