TM 9-2320-260-34-2
I
17-5. ENGINE COOLANT HEATER RESTRICTION THERMOSTAT MAINTENANCE
THIS TASK COVERS:
a. Removal
c. Installation
b. Inspection
INITIAL SETUP
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-260-34P-2
TEST EQUIPMENT
EQUIPMENT CONDITION
Multimeter (Appendix B, Item 115)
Engine coolant heater blower motor removed
TOOLS
General mechanic's tool kit
(Appendix B, Item 1)
Tool kit, electrical (Appendix B, Item 106)
a. Removal
NOTE
Tag wires for installation.
1. Disconnect two leads (1) from restriction thermostat (4).
2. Remove two nut-assembled lockwashers (2), washers (3), restriction thermostat (4), and two
spacers (5) from heat exchanger (6).
b. Inspection
1. Inspect restriction thermostat (4) for corrosion and bends. Replace if corroded or bent.
2. Check thermostat continuity at room temperature. If continuity exists, replace restriction
thermostat (4).
CAUTION
Do not place thermostat in liquid for cooling. Placing thermostat in
liquid will cause damage to equipment.
3. Cool restriction thermostat (4) to 20F (-6.7C). Check thermostat continuity. If continuity does not
exist, replace restriction thermostat (4).
c. Installation
1. Install two spacers (5) and restriction thermostat (4) on heat exchanger (6) with two washers (3) and
nut-assembled lockwashers (2).
2. Connect two leads (1) to restriction thermostat (4).
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