TM-9-2320-386-10
2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); OPERATOR’S MANUAL
JANUARY 1996
TM-9-2320-386-10 - Page 157 of 223
TM 9-2320-386-10
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Table 3-1. Troubleshooting (Contd).
5. ENGINE OVERHEATS AS INDICATED BY ENGINE COOLANT TEMPERATURE
GAUGE
WARNING
Extreme care should be taken when removing surge
tank filler cap if temperature gauge reads above
160°F (71°C). Contact with steam or hot coolant
under pressure may result in injury to personnel.
Step 1. Check aftercooler and radiator core for obstructions.
If clogged, remove debris. Refer to table 2-1.
Step 2. Check coolant level (para. 3-7).
If low, add coolant as required.
Step 3. Check for leakage from radiator and surge tank hoses and hose con-
nections.
If loose, tighten. If still leaking, notify unit maintenance.
Step 4. Check engine oil level (para. 3-7).
If low, add oil (table 2-2).
Step 5. Check radiator fan.
If fan is not turning, check for loose or broken engine drivebelt.
If loose or broken, notify unit maintenance.
Step 6. Check for loose or broken water pump drivebelt.
If loose or broken, notify unit maintenance.
END OF TESTING!
6. LOW ENGINE OIL PRESSURE
Check engine oil level (para. 3-7).
a. If low, add oil (table 2-2).
b. If low pressure condition continues, notify unit maintenance.
END OF TESTING!
7. EXCESSIVE EXHAUST SMOKE AFTER ENGINE REACHES NORMAL OPERATING
TEMPERATURE OF 160°F TO 230°F (71°C TO 110°C)
Check for restricted air cleaner.
a. If restricted, clean air cleaner element (para. 3-8).
b. If air cleaner is still restricted, notify unit maintenance.
END OF TESTING!
Change 1
3-7
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