TM 9-2320-260-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. ENGINE SURGES
Step 1. Check fuel system for contamination and restrictions (malfunction 2, steps 3, 4, and 5).
Step 2. Inspect accelerator linkage for proper operation and adjustment.
Adjust or replace as necessary (para. 3-37).
END OF TESTING!
7. EXCESSIVE OIL LOSS OR CONSUMPTION DURING NORMAL OPERATION AND IDLE
Step 1. Check for overfilling. Check oil level (TM 9-2320-260-10).
Drain crankcase to safe operating level if oil level is too high (LO 9-2320-260-12).
Step 2. Check for external oil leaks at oil pan, drainplug, oil filter housing, oil pump hoses and
tube, oil dipstick tube, and rocker arm cover.
Tighten any loose connections or loose screws that may cause leaks and fill oil to proper
level (LO 9-2320-260-12).
END OF TESTING!
8. ENGINE OIL PRESSURE TOO HIGH OR TOO LOW AT NORMAL OPERATING TEMPERATURE
Step 1. Check engine oil level (TM 9-2320-260-10).
Add or replace oil (LO 9-2320-260-12).
Step 2. Check for external oil leaks (malfunction 7, step 2).
Step 3. Check oil pressure line for bends, obstructions, and damage
Replace if damaged (para. 3-6).
Step 4. Check oil pressure gage for proper operation.
Connect oil pressure gage, which is known to be good, to oil pressure line. If test gage indi-
cates proper pressure, replace oil pressure gage (para. 4-9). If test gage indicates improper
pressure, shut down engine and notify your supervisor.
END OF TESTING!
9. EXCESSIVE FUEL CONSUMPTION
Step 1. Check for air cleaner restriction (malfunction 2, step 2).
Step 2. Inspect fuel lines, hoses, and connections for leaks and damage.
Tighten any loose connections. Replace damaged lines
END OF TESTING!
10. BLACK EXHAUST SMOKE AT IDLE
Step 1. Check fuel for water and dirt contamination (malfunction 2, step 3).
Step 2. Check air cleaner indicator for restriction indication (malfunction 2, step 2).
Step 3. Check cooling system (malfunction 18).
END OF TESTING!
11. EXCESSIVE VIBRATION OR CLUNKING
Check engine mounts and pads for looseness or damage.
If loose or damaged, notify your supervisor.
END OF TESTING!
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