Figure 5-3. Rebuilding The Pump - Thermo Scientific 48i Instruction Manual

Thermo Fisher Scientific
For older models, use the following procedure to rebuild the pump
5–3). To replace the pump, see
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Loosen the fittings and remove both lines going to the pump.
3. Remove the four screws from the top plate, remove top plate, flapper
valve, and the bottom plate.
4. Remove the screw securing the diaphragm to piston and remove
diaphragm.
5. Assemble the pump by following the previous steps in reverse, make
sure the Teflon® (white) side of the diaphragm is facing up and that the
flapper valves cover the holes of the top and bottom plate.
6. Perform the "Leak Test and Pump Check
Figure 5–3. Rebuilding the Pump
"Pump Replacement" on page 7-20.
Out" on page 5-4.
Top Plate
Flapper Plate
Bottom Plate
Diaphragm
Preventive Maintenance
Pump Rebuilding
(Figure
Model 48i Instruction Manual 5-9