Single-Channel Liquid Ends - BRAND Liquid Handling Station Operator's Manual

6.2 Single-channel Liquid Ends

To ensure proper function, the Liquid Ends should be serviced on a regular basis and cleaned
when needed.
Maintenance
1. Detach Liquid End: Press the decoupling button with one hand
while simultaneously removing the Liquid End with the other
hand.
2. Check the tip cone (lowest part of the pipette shaft (S) ) for
damage.
3. Inspect the piston on the lower end of the complete piston unit
(A) and the piston seal (C) for damage and contamination.
To do this, the Liquid End must be dismantled (see below).
Replace the piston if necessary.
4. Test the Liquid Ends for leaks.
Dismantling and cleaning
1. Uncouple the Liquid End from the motor control unit.
2. Unscrew retaining sleeve (A). The piston unit remains connec-
ted to the retaining sleeve.
3. Remove seal with spring (C).
4. Unscrew the upper ejector part (B) from the pipette shaft.
5. Pull shaft (D) out of the lower ejector part (E).
6. Clean the parts shown with a mild soap solution or isopropanol.
Then rinse with distilled water.
7. Allow parts to dry at max. 120 °C.
8. Lubricate piston with a very thin layer of the silicone oil supp-
lied.
9. Assemble the ambient temperature parts in reverse order. Re-
taining sleeve (A) and upper part of the ejector (B) should only
be hand-tight.
All individual components shown in the illustration can be
purchased as replacement parts.
Use only original spare parts!
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For testing, we recommend the BRAND PLT unit.
If the Liquid End is leaking, please contact the ma-
nufacturer's support department!