Replacing The Pump; Replacing The Pump Valve - Thermo Scientific TVA2020 Instruction Manual

Replacing the Pump

Replacing the Pump
Thermo Fisher Scientific
4. Apply a very small amount of non-hydrocarbon based grease to the o-
rings to facilitate reassembly.
5. Reinstall the orifice into the L-shaped block first.
6. Reverse the procedure to reassemble the pump assembly.
Note Be sure to push the pump firmly into the orifice block while
tightening the cross recess screw. If the gap is too large the pump will not
fit correctly in the bottom housing recess.
Use the following procedure to replace/service the pump.
1. Remove the two cross recess screws holding the board to the pump
(Figure
2. The pump can be further disassembled to replace the diaphragm and
valves.
3. Reverse the above procedures to reassemble the pump assembly.
Use the following procedure to replace the pump valve.
Valve
1. Disconnect the pump from electrical power. Make a sketch of the
position of any tubes and fittings for ease of re-assembly later.
2. Remove the five screws (010) with a Phillips head screw driver and
remove the headplate (020). Check that all parts are free from dirt and
clean as necessary. Do not scratch the parts.
3. Remove the old valveplate (030) from the Compressor housing (040).
4. Repeat steps 2 and 3 for opposite pump head.
5. Place the new valveplate (030) in the contour on the compressor
housing (040). Do not use tools!
7–18).
Servicing the Pump
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TVA2020 Instruction Manual
Servicing
7-21