TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 106 of 1176
TM 9-2320-361-24-1
0006 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE TEMPERATURE
GAUGE ABOVE 230 °F
(110 °C) (Contd)
4. Inspect drivebelts for damage
and check belt tension.
5. Inspect fan for broken or missing
blades.
6. Inspect radiator for bent fins.
7. Start engine. Remove radiator
cap and visually check coolant
for proper circulation and milky
film.
8. Check for clogged or broken
radiator (TM 750-254).
9. Check operation of temperature
gauge (WP 0014 00, table 1,
malfunction 2).
Replace any damaged parts and
adjust drivebelts (WP 0084 00).
If blades are broken or missing,
replace fan (WP 0075 00).
Straighten bent fins, or replace
radiator (WP 0077 00).
1. If coolant is not circulating
properly, stop engine, remove
thermostat, and test or replace
(WP 0081 00).
2. If milky film is present, check
cylinder head and gaskets for
defects (WP 0027 00).
For cleaning and flushing
instructions, refer to TB 750-651
Replace damaged temperature
gauge (WP 0095 00).
2. ENGINE DOES NOT
REACH NORMAL
OPERATING
TEMPERATURE
1. Start engine. Remove radiator
cap and visually check coolant
for proper circulation. Stop
engine.
2. Test coolant temperature gauge,
sending unit, and electrical
circuits (WP 0014 00, table 1,
malfunction 2).
If coolant is circulating below
100 °F, remove and test thermostat.
Replace if defective (WP 0081 00).
Replace damaged components.
3. COOLANT LOSS DURING
NORMAL OPERATION
1. Pressurize cooling system and
check for leaks.
2. Check radiator cap for proper
relief pressure (TM 750-254).
3. Check for coolant in oil.
1. Tighten loose clamps, fasteners,
or fittings.
2. Replace leaking hoses and/or
water pump (WP 0078 00 or
WP 0082 00).
Relief pressure should be 15 psi
(103 kPa). Replace radiator cap if
defective.
If coolant is found in oil, check
cylinder head and gaskets for
defects (WP 0027 00).
0006 00-10
MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)
Table 4. Cooling System Troubleshooting Procedures (Contd).
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