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

  TM-9-2320-387-24-1 - Page 217 of 1205

TM 9-2320-297-24-1
ENGINE
COOLING
DIAGNOSTIC
FLOWCHART
KNOWN INFO
NONE
POSSIBLE
PROBLEMS
COOLING
COMPONENTS
SERPENTINE
BELT
WATER PUMP 8 PULLEY
KNOWN INFO
COOLANT
QUALITY
OK
POSSIBLE
PROBLEMS
COOLANT
LEVEL
COOLING
COMPONENTS
SERPENTINE
BELT
WATER PUMP 8 PULLEY
I
KNOWN INFO
COOLANT
OK
1
POSSIBLE
PROBLEMS
THERMOSTAT
COOLING
COMPONENTS
SERPENTINE
BELT
WATER PUMP & PULLEY
IS THE COOLANT MIXTURE
CORRECT?
(SEE CHART ON PAGE 2-159.)
IS THE COOLANT AT THE
CORRECT LEVEL?
IS THE THERMOSTAT WORKING
PROPERLY?
;T OPllONS
1 .COOLANT MIXTURE TEST
KIT NSN 6630-0@169-1 SO6
P.CDOlANT
TESTER
REASON
FOR QUESTION
The cooling system will not operate
property if the mixture is incorrect.
r OPTIONS
VISUAL
REASON
FOR QUESTION
Low coolant levels may cause
overheating.
;T OPTIONS
FEEL FOR COOLANT
IN UPPER
RADIATOR
HOSE WHEN ENGINE IS
HOT, OR REMOVE THERMOSTAT,
EXPOSE f-f- TO 190°F (66’ C)
TEMPERATURES.
SEE IF IT OPENS.
REASON
FOR QUESTION
An improperly functioning thermostat
can cause operating temperatures
that are either too hot or too cold.


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