Cooling Assembly Replacement
3D3300R/4D3300R
Reference: Use this instruction with replace-
ment part 3D3300R or
4D3300R.
Tools Needed: Phillips screwdriver, flat-
bladed screwdriver.
Warning-Hazardous Voltage
Warning-Internal components may
be damaged by static electricity.
CAUTION: Improper tubing connec-
tions may result in fluid leakage and
cause damage to the instrument.
CAUTION The heat transfer liquid
contains hazardous chemicals. Consult
the material safety data sheet (MSDS)
and use appropriate personal protec-
tive equipment.
Instruction:
1. Turn off the power and unplug the instru-
ment.
2. Remove the screws securing the head
cover, and remove the cover.
3. Remove the screws securing the instru-
ment cover, and remove the cover.
4. 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).
5. Remove the deck and disconnect the
pump (see below):
a. Remove the six 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).
6. Lift out the old cooling assembly and
replace with the new one.
7. Note the new block probe bin number (E)
located on the block probe cable.
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).
325P300 Rev2
(3255 Service Manual)
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