Thermo Scientific Dionex, Руководство оператора

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10 • Service
Doc. 065250-06 03/2020
127
10.4 Replacing a Pump Piston Seal and Backup Seal
These instructions apply to the dilution pump and the stepper motor loading pump
(P/N 068561, both pumps).
A damaged seal allows leakage past the piston. The pump may be difficult to
prime and flow rates may be unstable.
Preparation:
1. Rinse the pump flow path with deionized water by turning the waste valve
knob (see Figure 10-1 ) one-half turn counterclockwise. This opens the waste
valve and directs the flow to waste.
2. After rinsing, close the waste valve.
3. To prevent contamination of pump parts, put on a pair of powder-free gloves
before disassembling the pump head.
Refer to Figure 10-4 when disassembling and reassembling the pump head.
To remove the pump head and piston:
1. Turn off the SP power.
2. Disconnect the power cord.
3. Disconnect all tubing connections to the pump head.
4. Using a 7/64-in hex key (P/N 068227), loosen the two screws on the pump
head. Remove the screws and washers.
Figure 10-4. Pump Head
Pump Head
(P/N 069005)
Piston
(P/N 066110)
Backup Washer
(P/N 069007)
Backup Seal
(P/N 066163)
Waste Valve
(P/N 063968)
Spacer with Drain
(P/N 069004)
O-Ring
(P/N 014895)
Main Seal
(P/N 069006)
Seal
(P/N 063382)
Screw (2)
(P/N 069222)
Washer (2)
(P/N 045690)
Outlet Check
Valve Assembly
(P/N 047661)
Inlet Check
Valve Assembly
(P/N 047660)