Cooling Assembly Replacement
3D3300/4D3300
Reference: Use this instruction with replace-
ment part 3D3300 or 4D3300.
Tools Needed: Phillips screwdriver, flat-
bladed screwdriver.
Warning-Hazardous Voltage
Warning-Internal components may
be damaged by static electricity.
CAUTION: Improper connections
may cause damage to the instrument.
Instruction:
1. Turn off the power and unplug the instru-
ment.
2. Remove the screws securing the instru-
ment cover, and remove the cover (see
below):
The following instructions refer to 4D3
cryoscopes with suffix "A" or later, and
to all 3D3 osmometers:
a. Remove the two sets of screws from
the side panels and the two screws
from the rear panel.
b. Slide the instrument cover up and off.
The following instructions refer to 4D3
cryoscopes without a suffix:
a. Remove the heat transfer fluid from
the front cover.
b. Remove the two screws from the rear
panel of the back cover and lift off the
back cover.
c. Remove the four screws from under-
neath the front cover, lift the front
cover slightly up and then slide it for-
ward and off.
3. Drain the system:
a. Remove the heat transfer fluid bottle
and empty the contents.
b. Replace the empty bottle and insert
the tubes.
c. Press gently on the pump at the bot-
tom of the head. Slide until all liquid
has been expelled (the unit may need
to be tipped on its side to remove the
liquid).
4. Remove the deck and disconnect the
pump (see below):
The following instructions refer to 4D3
cryoscopes with suffix "A" or later, and
to all 3D3 osmometers:
a. Remove the four screws from the
deck (A), and remove the deck.
b. Remove the two screws that secure
the bottle bracket to the cooling
assembly (B).
c. Remove the two screws that secure
the pump bracket to the cooling
assembly (C).
d. Disconnect the hose from the pump
mechanism (D).
For additional information or technical assistance,
please contact Advanced Instruments Hot-Line
®
Service Center (U.S. 1-800-225-4034, outside
North America +US 1-781-320-9000).
4D3P300 Rev1
(4D35 Service Manual)
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