4700 Refrigerated Sampler Service Guide
Section 2 Sample Delivery System
2-6
2.3.2 Thumb Screw
If removal of the thumb screw is necessary, first unscrew the
thumb screw and lift the hinged half of the pump cover. Pry the
o-ring loose with a small flat screwdriver and then pull the shaft
out of the pump cover.
Figure 2-5
Thumb screw removal
2.3.3 Pump Housing Cover
and Band
To remove the pump housing cover and access the pump band,
first release the pump band by opening the latch. Remove the
four screws holding the cover in place.
CAUTION
The screw nearest the edge (Figure 2-6) must be reinstalled
with great care, as it is possible to strip the plastic threads.
This screw should always be the last to install.
Figure 2-6
Opening the pump housing cover and latch
CAUTION
When
reinstalling
all self-tapping screws, avoid destroying the
plastic threads. First, seat each screw in its hole and, without
pressing down, rotate the screw counter-clockwise until it falls
into its thread groove with a "click." Then tighten the screw.
This precaution is not necessary with new, unthreaded holes.
O-ring
4th
screw
Pump
latch
Key
groove
Summary of Contents for 4700
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Page 6: ...Isco 4700 Refrigerated Sampler Service Guide Safety iv ...
Page 12: ...4700 Refrigerated Sampler Service Guide Table of Contents x ...
Page 30: ...4700 Refrigerated Sampler Service Guide Section 1 Introduction and General Guidelines 1 18 ...
Page 60: ...4700 Refrigerated Sampler Service Guide Section 2 Sample Delivery System 2 30 ...
Page 108: ...4700 Refrigerated Sampler Service Guide Section 4 CPU and Power Supply 4 26 ...
Page 124: ...4700 Refrigerated Sampler Service Guide Appendix A Electrical Diagrams A 2 ...
Page 126: ...4700 Refrigerated Sampler Electrical Wiring A 4 Figure A 3 4700 wiring diagram 230V ...
Page 128: ...4700 Refrigerated Sampler Electrical Wiring A 6 Figure A 5 4700 CPU schematic diagram ...
Page 131: ...4700 Refrigerated Sampler Appendix B Replacement Parts List B 3 ...
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