Bio-Rad BioLogic Signal Import Module (SIM) - Manual (Page 198)

f. Using the four long mounting screws removed earlier, remount the pumphead assembly to the
Workstation so that it is secure. Insert and alternately tighten the mounting screws. Do not over
tighten.
g. Using the priming port on the front of the pumphead, purge the pump with 50% methanol and
then flush with water.
3. Care of the Pistons.
To maintain pump performance, the pumphead should be rinsed on a nightly basis. The pump may
be rinsed automatically by programming a water rinse step at the end of each protocol. It is also
important to rinse behind the piston seals by injecting water through the washout port, located at the
top of the pumphead. A standard syringe may be used for this purpose.
Figure 11-3. Pumphead Assembly
"SHORT"
SCREWS
(8-32 X 1.0")
"LONG"
SCREWS
(8-32 X 1.5")
NOTE: FOR BOTH "SHORT" AND "LONG" SCREWS
USE PUMPHEAD DISASSEMBLY ALLEN WRENCH
(OR STANDARD 9/64" ALLEN WRENCH)
OUTLET BLOCK
WASHOUT PORT
O-RING
O-RING
CENTER BLOCK
FLOW RATE
IDENTIFICATION
("10" or "40")
INLET BLOCK
CHECK VALVES
CHECK VALVES
PUMP HEAD
ASSEMBLY
10
MAINTENANCE MAINTENANCE AND TROUBLESHOOTING
11-5