ENGINE OVERHEATS AS INDICATED BY ENGINE COOLANT TEMPERATURE GAUAGE

TM 9-2320-386-10

Table 3-1. Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

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

160F (71C). 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 160F TO 230F (71C TO 110C)

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!

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