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![]() TM 5-2420-222-20-1 
THERMOSTAT 
This task covers: 
a. Removal (page 2-396) 
d. 
Testing (page 2-398) 
b. Cleaning (page 2-397) 
e. 
Installation (page 2-398) 
c. Inspection/Replacement (page 2-397) 
INITIAL SETUP: 
Tools 
Materials/Parts 
Handle, ratchet, 3/8-inch drive 
Gasket, thermostat cover 
Heating equipment 
Rags, wiping (item 21, Appendix C) 
Screwdriver, flat-tip, 3/16-inch 
Socket, 3/8-inch drive, 9/16-inch 
Personnel Required 
Thermometer 
Wrench, torque, 3/18-inch drive, 
One 
0 to 60 N.m capacity 
Equipment Condition 
1. Hood removed (page 2-1025) 
2. Radiator drained (page 2-368) 
ACTION 
LOCATION 
ITEM 
REMARKS 
REMOVAL 
1. Upper radiator 
Clamp (2) 
Using 3116-inch flat-tip screwdriver, 
hose (1) 
loosen. 
2. Cover (3) 
Upper radiator 
Pull off. 
hose (1) with 
assembled clamp (2) 
3. Cover (3), clamp 
Two screws (6) 
Using 9/16-inch, 3/8-inch drive socket 
(4), and thermostat 
and ratchet handle, unscrew and take out. 
housing (5) 
4. Cover (3) and 
Clamp (4) 
Take off. 
Injection leakoff 
fuel tube (7) 
5. Thermostat 
Cover (3) and 
a. Take off. 
housing (5) 
gasket (8) 
b. Get rid of gasket (8). 
6. 
Thermostat (9) 
Take out. 
2-396 
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