The Advanced
®
3D3/4D3 Service Manual
39
Use this procedure to clean the well and tub-
ing of any foreign matter (e.g., broken glass)
that may have fallen into the well.
Tools needed: Flat-bladed screwdriver;
Phillips screwdriver; Tru-arc pliers; thin, stiff
wire.
Osmometer Well Cleaning
1. Turn off the power and unplug the instru-
ment.
2. Remove the two screws from the head
cover and remove the head cover.
3. Remove the screws from the side and rear
panels of the instrument cover, and
remove the cover.
4. Remove the four screws from the deck
(A) and remove the deck.
5. Drain the cooling system (see Cleaning
and Maintenance).
6. Disconnect the pump from the cooling
assembly.
7. Using a pair of Tru-arc pliers, remove the
Tru-arc retainer ring (B) from inside the
well. (Save the retainer ring for replace-
ment when cleaning is complete.)
8. Remove the white Delrin elevator and
spring (C). (Save for replacement when
cleaning is complete.)
9. Inspect the bottom of the well and remove
any visible debris.
10. Using a thin stiff wire, insert it into the
tubing and the pump disconnect point in
step 6.
Note: The wire diameter MUST be small
enough to pass through the well.
11. Push the wire through the tubing and into
the well. Repeat this process several
times, sliding the wire back and forth.
(This should loosen any deposit trapped
in the tube and the well.)
12. Reassemble the pump to the well.
13 Using a solution of 20% bleach and 1:5
distilled water, place the filter and well
return line into this solution. Manually
press the pump up and down until the
solution has circulated through the pump
and well, and into the bottle.
14. When satisfied that the solution is free-
flowing, stop and drain the cooling sys-
tem.
15. Reassemble the instrument by reversing
steps 1-8.
Osmometer/Cyryoscope Well Cleaning
A
B
C
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