TM 5-4310-354-14
Table 3-2. Operator/Crew Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE - continued
8. ENGINE HAS LOW FUEL PRESSURE - continued.
Step 2.
Check fuel pressure hose connections for leaking.
Tighten the connections at fuel pressure gauge and at fuel injection pump.
Step 3.
Inspect fuel pressure gauge for proper operation.
Notify organizational maintenance for gauge replacement.
Step 4.
Check fuel injection pump operation.
Purge the fuel system of air (figure 3-17). If system is not air-bound, notify Di rect or General
Support maintenance.
Step 5.
Inspect for a dirty, clogged fuel filter.
Replace dirty fuel filter.
Step 6.
Check for any other cause.
Notify organizational maintenance.
9. ENGINE EXHAUST EXCESSIVELY BLACK.
Step 1.
Check air cle aner restriction indicator on instrument panel for red color indicating a restricted flow of air
to engine.
Remove the air cleaner element for organizational maintenance cleaning. Install a clean air
cleaner element and reset restriction indicator to green by pressing down on top of the
indicator.
Step 2.
Check for restriction in engine exhaust.
Remove any exhaust obstruction.
Step 3.
Check for the use of proper grade of fuel.
If fuel grade is not correct, drain fuel tank, refill with proper grade, and purge the fuel system of
air.
Step 4.
Check engine operating temperature for overheating.
If engine coolant and oil level is not low causing engine to overheat, notify organizational
maintenance.
Step 5.
Check for any other cause.
Notify organizational maintenance.
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