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 TM 55-1905-220-14-4
3-9.4. WATER TEMPERATURE SWITCH - MAINTENANCE INSTRUCTIONS
a. The terminals of the water temperature switch are connected into the alarm system, andwhen the
engine circulating water temperature reaches 205 5 (96 2.9 ), the switch closes and turns on the
F
C
alarm system.
b. As the water temperature increases, a plunger rises and contacts a wheel which is attached to the
switch actuating lever. A further increase in water temperature forces the contact end of the actuating lever
upwards. When the water temperature reaches 205 5 (96 2.9 ); this lever forces the switch button
F
C
upwards into the switch block, thus closing the switch. Since this lever is spring loaded, the contact end of the
lever moves away from the switch button as the water temperature decreases.
NOTE
An alarm will sound in the pilothouse.
This task covers:
a. Testing
c. Removal
b. Adjustment
d. Installation
INITIAL SETUP :
Test Equipment
References
Thermometer
NONE
Equipment
Special Tools
Condition
Condition Description
NONE
NONE
Material/Parts
Special Environmental Conditions
NONE
NONE
Personnel Required
General Safety Instructions
1
NONE
LOCATION
ITEM
ACTION
REMARKS
Testing
1. Engine
Instrument
Start engine and operate
panel
at idle speed.
3-391
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