TM 10-4320-344-24
Table 2-4. Unit Troubleshooting Table. (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. AMMETER READING TOO LOW. (Continued)
Step 3.
Test alternator (paragraph 2.21.16).
a .
Replace alternator (paragraph 2.21.16).
b .
Notify direct support maintenance.
6. ENGINE SMOKES.
Step 1.
Check engine exhaust for black or blue color.
Clean or replace air filter as required (paragraph 2.14.1/2.14.2/2.14.3).
Step 2.
Check oil level.
Refer to LO 10-4320-344-12 and drain excess oil.
Step 3.
Disconnect outlet side of fuel filter and start engine. Check fuel for
contamination.
a .
Change fuel filter (paragraph 2.21.4/2.21.5).
b .
Notify direct support maintenance.
7. ENGINE KNOCKS.
Step 1.
Check engine oil level.
Refer to LO 10-4320-344-12 and add oil as required.
Step 2.
Check to see if oil or oil filter requires changing.
a.
Refer to LO 10-4320-344-12 and change oil and/or filter.
b.
Notify direct support maintenance.
8. ENGINE OVERHEATS. (Model 609-A)
Step 1.
Check coolant level.
Add coolant as required (paragraph 2.20.3).
Step 2.
Check radiator for damage.
Replace radiator (paragraph 2.20.4).
Step 3.
Inspect for broken, missing, or loose alternator belt.
a .
Adjust alternator belt tension (paragraph 2.21.13).
b .
Replace alternator belt (paragraph 2.21.13).
Step 4.
Check fan for damage.
Replace fan (paragraph 2.21.42).
Step 5.
Test thermostat (paragraph 2.21.41).
a .
Replace thermostat (paragraph 2.21.41).
b .
Notify direct support maintenance.
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