TM 9-2330-356-14
Table 4-9. Unit Troubleshooting (Con`t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (Con't)
21. BLACK SMOKE EXHAUST OR EXCESSIVE FUEL CONSUMPTION (Con't).
Step 2.
Inspect for proper grade or dirty fuel,
Check fuel specification (para 2-10). Drain, fill with proper grade of fuel. If fuel is dirty, check
fuel filter (para 4-73).
Inspect for dirty air cleaner.
Step 3.
22. PREHEAT INDICATOR LAMP WILL NOT LIGHT.
Step 1.
Check for burned out lamp (para 4-24).
Replace burned out lamp.
Step 2.
Check battery conditions (para 4-23).
a. Clean cables and terminals.
NOTE
Do not slave start or jump start batteries.
Step 3.
Test preheat switch (para 4-24).
Replace if defective.
Step 4.
Remove engine junction box cover. Turn preheater solenoid switch to ON position and listen for
clicking sound.
CENTRIFUGAL PUMP
23. PUMP FAILS TO DELIVER FUEL.
Step 1.
Check if pump either has lost prime or has not been primed.
Prime pump (para 4-90).
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