Dionex AutoTrace 280 Operator’s Manual
102
Doc. 065330-05 03/2020
3.
For the Dionex AutoTrace 280 disk model:
Remove the pulse damper from
the pump outlet.
4. Use the #2 Phillips screwdriver to remove the two Phillips screws on the front
of the pump. Remove the black cover.
5. Remove the white plastic pump head by pulling it straight away from the
pump.
6. Unscrew the metal retainer from the pump head.
Tip:
If necessary, use pliers
to loosen the retainer.
Note the order of the parts inside the retainer: The white washer is closest to
the retainer; the two red seals are closest to the pump head.
7. Rinse the bore in the pump head, the washer, and both seals with deionized
water. Be careful not to scratch the ID of the pump head bore; scratches will
prevent a proper seal.
8. Remove the piston from the pump by angling the piston and pulling it out.
9. Rinse the piston with deionized water. Be careful not to scratch the piston;
scratches will prevent a proper seal.
10. Place the metal retainer onto the piston, followed by the white washer and the
two red seals. The red seals must be placed onto the piston carefully, so as not
to deform them as they pass across the notched cutout of the piston. Install the
seals in the retainer in the order in which they were removed.
11. Reinstall the piston/retainer/washer/seal assembly by inserting the dowel pin
at the end of the piston into the hole in the bearing inside the pump drive bore.
12. Screw the pump head carefully onto the piston/retainer/washer/seal assembly.
Tighten the retainer. Using pliers, turn the retainer 10 degrees past finger-
tight.
13. Replace the black cover and reinstall the two Phillips screws on the front of
the pump.
14. Replace the compression fittings and the inlet and outlet tubing.
15.
For the Dionex AutoTrace 280 disk model:
Reinstall the pulse damper.
16. To verify that the pump is running correctly, run the Calibrate Pump
diagnostic method (#31). While the method runs, check for leaks from the
pump and pump volume accuracy.
