Figure 5-5. Rebuilding The Pump - Thermo Scientific 146i Instruction Manual

Preventive Maintenance
Pump Rebuilding
5-10 Model 146i Instruction Manual
3. Remove the four screws from the top plate, remove top plate, flapper
valve, and the bottom plate.

Figure 5-5. Rebuilding the Pump

4. Remove the screw the 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. Test the pump for leaks. Refer to "Leak Test and Pump Checkout" in
the "Servicing" chapter.
Top Plate
Flapper Plate
Bottom Plate
Diaphragm
Thermo Fisher Scientific