TM 9-2320-361-34 17-4. ENGINE COOLANT HEATER RESTRICTION THERMOSTAT MAINTENANCE THIS TASK COVERS: a. Removal c. Installation b. Inspection INITIAL SETUP APPLICABLE MODELS REFERENCES (TM) All TM 9-2320-361-34P TEST EQUIPMENT EQUIPMENT CONDITION Multimeter (Appendix B, Item 3) Engine coolant heater blower motor removed (para. 17-3). TOOLS General mechanic’s tool kit (Appendix B, Item 1) Tool kit, electrical (Appendix B, Item 2) a. Removal NOTE Tag wires for installation. 1. Disconnect two leads (1) from restriction thermostat (3). 2. Remove two nut-assembled lockwashers (2), restriction thermostat (3), and two spacers (4) from two studs (5). b. Inspection 1. Inspect restriction thermostat (3) for corrosion and bends. Replace if corroded or bent. 2. Check thermostat continuity at room temperature. If continuity exists, replace thermostat (3). CAUTION Do not place thermostat m liquid for cooling. Placing thermostat in liquid will cause damage to equipment. 3. Cool thermostat to 20F (-6.7°C). Check thermostat continuity. If continuity does not exist, replace thermostat. I c. Installation 1. Install restriction thermostat (3) and two spacers (4) on two studs (5) with two nut-assembled lockwashers (2). 2. Connect two leads (1) to restriction thermostat (3). 17-8