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 TM 9-2320-285-24-1
2-15.
COOLING SYSTEM MAINTENANCE (CONT)
e.
Fan Clutch Control System (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (cont)
11
d. Solenoid (29)
Inspect for
Replace if defects observed
(cont)
cracks
lead insu-
lation
cracked
threads
damaged
e. Remaining parts
Inspect for
Replace if defects observed
cracks
threads
damaged
distortion
TESTING
12
a. Solenoid (29)
a. Connect to a source of clean air; with
air pressure applied, air should vent
from outlet port
b. With air source connected to solenoid,
connect wire leads to 12 volt battery.
Air should not vent from outlet port
c. If above indications are not obtained,
replace solenoid (29)
b. Thermal switch
a. Connect ohmeter across terminals and
(7)
check that ohmmeter indicates zero
ohms; replace thermal switch if proper
indication is not obtained
b. Wrap threads of thermal switch with
Teflon tape and install in water mani-
fold. Fill radiator and engine with
coolant; para 2-15a(l)
c. Connect ohmeter across thermal switch
terminals and start engine. When engine
temperature reaches approximately 190
degrees, ohmeter should indicate open
circuit (infinity). Replace thermal
switch if proper indication is not
obtained. Turn engine off after
completion of test
2-159
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