Maintenance
Pump Rebuilding
Thermo Scientific
42iQTL Instruction Manual
5-5
Use the following procedure to rebuild the pump.
Equipment required:
Pump rebuild kit (qty. 2)
Allen wrench, 3 mm and 4 mm
Wrench, 9/16-inch
Needlenose pliers
1.
Turn instrument off, unplug the power cord, and disconnect the pump
plumbing from the instrument.
2.
Note the orientation of the pump head top plate for later reassembly.
Using a 3 mm Allen wrench, remove the eight socket head screws and
washers securing the pump head top plate.
3.
Discard the old PTFE gasket.
4.
Note the orientation of the diaphragm head for later reassembly.
Remove the diaphragm head. Using a 4 mm Allen wrench, remove the
four socket head screws securing the diaphragm head to the pump
body.
5.
Insert the tips of blunt needlenose pliers in the dimples of the clamping
disk, then loosen and remove the clamping disk.
6.
Remove and discard the old PTFE gasket.
7.
Insert the clamping disk into the new Teflon diaphragm (three pieces)
and screw the clamping disk into the pump. Do not over tighten.
Pump Rebuilding
Summary of Contents for 42iQTL
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