Eppendorf Varispenser 4962 - Manual (Page 40)

12. Cleaning / replacing valves
12.1. Cleaning / replacing the filling valve
Note:
Valve ball (9) may fall out when valve is removed.
1. Unscrew the filling valve (10) using
the tool (20).
2. Clean or replace the valve.
3. To reassemble, tighten valve (10) by
hand and complete using tool (20).
Warning: Never use force during disassembly and assembly. Verify that all
components fit tightly and securely. Subsequent to reassembly, gravimetrically check
volume (see chapter 14).
12.2. Cleaning / replacing the discharge / recirculation valve
1. For dispensers with recirculation valve, set valve toggle (13) to ”recirculation.”
2. Remove the valve toggle (13), then lift the discharge tube support (14).
3. Lift the securing clip (15) with a small screw-driver.
4. Pull out the discharge / recirculation valve (16).
5. Unscrew the discharge tube securing nut (17) and pull out the discharge tube (18).
6. Clean or replace the valve.
7. To reassemble, push in the valve (16) by hand. Then insert the securing clip (15).
8. Push in the discharge tube. Tighten the securing nut (17).
9. In reverse order mount the discharge tube support (14) and recirculation valve
and valve toggle (13), if so equipped.
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