TM 5-3810-289-12
Section X. MAINTENANCE OF ENGINE COOLING SYSTEM COMPONENTS
operation.
4-31.
Radiator Test and Replacement
b. Replacement.
Refer to figure 420 and
a. Refer to TB 750-651 and clean and test
replace the fan belt.
radiator.
b. Refer to figure 4-19 and replace the
4-33.
Thermostat and Thermostatic Housing
radiator.
a. Testing. The opening and closing of the
c. Replace cracked or frayed hose and
high range (180/1950 F) thermostat can be checked
defective clamps.
against a thermometer while immersed in water, as the
water is brought up to temperature by heating. See
4-32.
Fan Belt Replacement
figure 4-21.
a. General. When a new belt is installed, it
b. Replacement. Refer to figure 4-22 and
should be tightened until a reading of 90-to 110-lbs
replace the thermostat and thermostat housing.
(pounds) force is obtained as registered on ST-968
gage. All new belts will loosen after running an hour or
4-34.
Fan Blade Replacement
more and may require readjustment. Recheck belt
a. Refer to figure 4-19 and remove the fan
tension with ST-968 gage; if reading is less than 80 lbs,
blade guard.
loosen the fan bracket mounting screws. Turn the
b. Refer to figure 4-23 and replace the
adjusting screw, as required, to obtain a reading of 90 to
110 lbs. Retighten the fan bracket mounting screws.
fanblade.
Belt tension should be checked every 400 to 500 hours
4-26
