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TM 5-4320-308-13
Table 3-2. Unit Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
ENGINE RUNS UNSTEADILY AND POWER OUTPUT IS LOW
CAUTION
A high temperature condition may cause abnormal
engine operation.
Step 1.
Check window of air cleaner restriction indicator for red band indicating blocked air cleaner.
If red band appears in window of air cleaner restriction indicator and rain hood is not blocked and no
damage to system components is found, replace air filter (para 3-22).
Step 2.
See Malfunction 2, step 4.
Step 3.
Notify intermediate maintenance.
4.
DENSE SMOKE FROM EXHAUST AFTER WARMUP
Step 1.
Shut down engine. With engine level, check oil level (para 3-1.). Add oil if necessary.
Step 2.
Check window of air cleaner restriction indicator for red band indicating blocked air cleaner.
If red band appears in window of air cleaner restriction indicator and rain hood is not blocked and no
damage to system components is found, replace air filter (para 3-22).
Step 3.
Notify intermediate maintenance.
5.
ENGINE OVERHEATS
Step 1.
Check cooling air ducting for damage and dirt.
a.
Check cylinder cooling fins for damage or dirt.
b.
Check blower ring blades for damage or dirt.
Remove accumulated dust and dirt with a stiff-bristled brush.
Start engine after cleaning. Allow engine to run until all indications of moisture have evaporated.
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