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5 - Maintenance
Periodic Maintenance
Figure 5-2
5.3.5
5 - 6
3
Remove the syringe plunger from the barrel.
4
Using a single edged razor or precision knife, carefully slice the old seal
lengthwise and remove them from the plunger.
5
Replace the "O"-ring and wet the new "O" ring and plunger tip with distilled or
deionized water.
6
Place the seal in the installation tool with the open end facing up. Press the
plunger tip firmly into the hole until it snaps into position.
7
Lay the plunger on a flat table top, and position it so that the seal (from the
"O"-ring up) hangs over the edge.
8
Slowly roll the plunger along the table edge pressing firmly on the portion of
the seal below the "O"-ring. See Figure 5-2.
Syringe Seal Assembly
9
Rotate the plunger three complete turns. This is necessary to make the sharp
raised edge of the plunger bite into the seal for a secure fit.
10 Wet the seal with distilled or deionized water, then insert the plunger/seal
assembly into the glass barrel.
Note: Syringe sizes 1 mL and above have "O"-rings.
Replacing the XLP 6000 Valve
To replace the XLP 6000 valve, follow these steps:
1
Remove as much fluid as possible from the system by cycling the pump and
using air as the system fluid.
2
Initialize the pump using the ZR command so that the valve motor shaft is in
the correct position.
3
Remove the syringe and tubing.
4
Remove the two socket head screws on the front of the valve, then remove
the valve from the pump. Do not remove the spacer.
5
Install the new valve by placing it on the front panel so that the screw holes
line up. The valve coupler fitting mates to the valve motor shaft. The shaft
should be in the correct position. If it is not, re-initialize the pump using the
command ZR.
Cavro® XLP 6000 Modular Syringe Pump Operating Manual, 734237-C, en
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