TM-9-2320-260-34-2

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2

JULY 1994

TM-9-2320-260-34-2 - Page 711 of 863

TM 9-2320-260-34-2

17-5. ENGINE COOLANT HEATER RESTRICTION THERMOSTAT MAINTENANCE

I

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

(para. 17-4).

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 20°F (-6.7°C). 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).

17-10