EXCESSIVE FUEL USAGE

10-3930-638-24&P

2-9. ENGINE TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR lNSPECTION

CORRECTIVE ACTION

2. EXCESSIVE FUEL USAGE

Check fuel lines for leakage or damage.

Step 1.

a. If fuel lines are leaking or damaged, repair or replace (para 2-15d(2)).

b. If fuel lines are okay, proceed to step 2 below.

Step 2. Check fuel tank for leakage or damage.

a. If fuel tank leaks or is damaged, notify direct support maintenance.

b. If fuel tank is okay, proceed to step 3 below.

WARNING

If NBC exposure is suspected, all air filter media should be handled by per-

sonnel wearing protective equipment. Consult your unit NBC officer or

NBC NCO for appropriate handling or disposal procedures.

Check if air cleaner indicator red flag is in view.

Step 3.

a. If in view, depress reset button on top of indicator and check that red flag disappears from view. (If

red flag does not disappear from view, replace air cleaner indicator as described in para 2-15c.)

Crank engine and check if red flag is in view; if@ flag is in view, service air cleaner (para 2-15c).

b. If red flag is not in view, notify direct support maintenance.

2-11. EXHAUST SYSTEM TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

EXCESSIVE EXHAUST NOISE

Step 1. Check muffler and exhaust pipe for cracks and holes.

a. If muffler or exhaust pipe are cracked or holes are observed, replace (para 2-16).

b. If muffler and exhaust pipe check okay, proceed to step 2 below.

Step 2. Squirt small amount of oil on muffler gasket area where muffler connects to exhaust manifold. With

engine idling, check if air bubbles can be seen, indicating damaged gasket.

a. If air bubbles are seen, replace gasket (para 2-16).

b. If air bubbles are not seen, proceed to step 3 below.

Step 3. Squirt small amount of oil on exhaust manifold in gasket area where exhaust manifold is mounted to

cylinder head.

With engine idling, check if air bubbles can be seen, indicating damaged gasket.

a. If air bubbles are seen, replace gasket (para 2-14e).

b. If muffler and exhaust pipe check okay, proceed to step 4 below.

Step 4. Check exhaust manifold for cracks or holes.

Replace exhaust manifold (Para 2-14e).

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