TM-9-2320-387-24-1
TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1
DECEMBER 1997
CHANGE 1
TM-9-2320-387-24-1 - Page 219 of 1205
TM 9-2320-387-24-l
ENGINE COOLING
I
KNOWN INFO
I
COOLANT
OK
THERMOSTAT
OK
POSSIBLE
PROBLEMS
COOLING COMPONENTS
SERPENTINE
BELT
WATER PUMP & PULLEY
KNOWN INFO
I
COOLANT OK
PRESSURE
CAP OK
THERMOSTAT
OK
POSSIBLE
PROBLEMS
HOSES
SURGE TANK
RADIATOR
THERMOSTAT
ENGINE FAN
WATER PUMP & PULLEY
KNOWN INFO
COOLANT OK
PRESSURE
CAP OK
THERMOSTAT
OK
HOSES OK
SURGE TANK OK
OIL COOLER OK
POSSIBLE
PROBLEMS
RADIATOR
ENGINE FAN
WATER PUMP 8 PULLEY
DIAGNOSTIC
FLOWCHART
fla@
I
TEST OPTIONS
/
INSPECT THE PRESSURE CAP.
PRESSURE
TESTER
IS IT IN GOOD CONDITION?
I
REASON
FOR QUESTION
TEST OPTIONS
INSPECT ALL RADIATOR HOSES,
LOOK.
COOLANT HOSES, SURGE TANK,
RADIATOR, OIL COOLER, AND
FllTlNGS
FOR DAMAGE,
BLOCKAGE, OR LARGE LEAKS. IS
EVERYTHING IN GOOD SHAPE?
REASON
FOR QUESTION
Physical damage and blocked
I
I
passages can cause cooling
IF BLOCKED.
OTHERWISE,
NOTIFY DS MAINTENANCE
-CHAPTER
i
r
-7
6
IS THE ENGINE FAN WORKING
PROPERLY?
I- OPTIONS
LOOK --
SEE DESCRIPTION
OF
OPERATION
AT RIGHT.
REASON
FOR QUESTION
The engine fan helps cool the
engine.
2-162
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