TM 9-4110-258-13
4.40 THERMOMETER TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Lock Washer
Refrigeration unit shut down (para 2.7) and power
1, Appendix G
disconnected.
Lock Washers (3)
Left side panel (evaporator) removed (para 4.16).
6, Appendix G
Tie Down Straps
General Safety Instructions:
24, Appendix E
WARNING
Silicone RTV
20, Appendix E
High voltage and exposed rotating parts are
used in the refrigeration unit. Personal injury
can result if power is connected.
a. Testing.
(1) Remove screw (1), lock washer (2), and flat washer (3). Discard lock washer.
(2) Remove clamp (4).
(3) Immerse sensing bulb (5) into a temperature controlled bath at 32F (0C). A bath at this temperature can be
made by putting the sensing bulb into a container of ice and covering with water. Ice must remain packed
around sensing bulb at all times during tests.
(4) Check temperature indicated on thermometer (6). Temperature indicated should be between 24F (-4C) and
40F (4C). If temperature indicated is above or below this range, replace thermometer.
(5) If tests did not indicate a failure, slip clamp (4) over sensing bulb (5).
(6) Install clamps (4) and (7), flat washer (3), new lock washer (2), and screw (1).
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