Unit Mechanical Troubleshooting - continued

TM 9-2320-386-24-1-1

0010 00

Unit Mechanical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

13. EXCESSIVE FUEL CONSUMPTION

Step 1. Check for air cleaner indicator restrictions (malfunction 2, step 3).

Step 2. Inspect fuel lines, hoses, and connections for leaks and damage.

a. Tighten any loose connections.

b. If fuel lines, hoses, or connections are leaking or damaged, notify direct support

maintenance.

Step 3. Check maximum engine idle speed is set within specifications. If maximum engine idle

speed is incorrect, adjust (WP 0052 00).

END OF TESTING!

EXHAUST SYSTEM

14. EXHAUST COLOR BLUE DURING NORMAL OPERATION

NOTE

Blue exhaust indicates presence of excess engine oil in cylinder combustion space.

Step 1. Check that engine oil grade is correct for vehicle use and climatic conditions

(WP 0023 00).

If oil grade is incorrect, replace oil and oil filters (WP 0033 00).

Step 2. Check that engine fuel grade is correct for vehicle use and climatic conditions

(TM 9-2320-386-10).

a. If fuel grade is incorrect, drain complete fuel system and replace with correct grade

of fuel (TM 9-2320-386-10).

b. If problem persists, notify direct support maintenance.

END OF TESTING!

15. EXHAUST COLOR WHITE DURING NORMAL OPERATION AND IDLE

CAUTION

Thick white smoke indicates coolant is present in engine combustion

chambers during operation. When this condition is evident, shut engine

down immediately and determine cause. Continued engine operations

may result in permanent engine damage.

Step 1. Check engine temperature. Ensure engine temperature is at specified level.

If engine temperature is above operating level, perform malfunction 19.

Step 2. Check for presence of water in fuel. If water is present, drain fuel system and refill fuel

tanks. Replace fuel filter (WP 0054 00).

Step 3. If problem persists, notify direct support maintenance.

END OF TESTING!

16. EXCESSIVE EXHAUST NOISE

Step 1. Inspect turbocharger for secure mounting and exhaust leaks.

If turbocharger mountings are loose, notify direct support maintenance.

Step 2. Inspect exhaust pipes, stack, and muffler for secure connections, cracks, breaks, and

excessive rust. Replace exhaust pipes if cracked, broken, or rusted (WP 0066 00). Tighten if

loose.

Step 3. Inspect exhaust manifold for leaks. If leaking, notify direct support maintenance.

END OF TESTING!

0010 00-6