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LPU Engine Troubleshooting.
ENGINE SPEED AND PERFORMANCE DROP OFF AND BLACK SMOKE IS EMITTED FROM EXHAUST

TM-5-5420-280-10 Rapidly Emplaced Bridge (REB) NSN: 5420-01-481-3959 Manual
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TM 5-5420-280-10
0039 00
LPU Engine Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2. Check starter motor cables for corrosion.
If corrosion is present, notify field maintenance.
Step 3. Starter motor malfunctioning.
Notify field maintenance to test starter motor.
END OF TESTING
4. ENGINE STARTS BUT STOPS RUNNING AS SOON AS STARTER MOTOR IS
DISENGAGED
Step 1. Engine speed control lever not located far enough in start direction.
Move engine speed adjustment lever to START position.
Step 2. Fuel filter blocked.
Notify field maintenance to check fuel filter.
END OF TESTING
5. ENGINE SHUTS DOWN DURING OPERATION
Step 1. Check for empty fuel tank.
Fill fuel tank.
Step 2. Fuel filter blocked.
Notify field maintenance to check fuel filter if necessary.
Step 3. Use CBT back-up power to complete launch or retieval. Refer
to WP 0026 00.
END OF TESTING
6. ENGINE SPEED AND PERFORMANCE DROP OFF
Step 1. Check fuel level.
Fill fuel tank.
Step 2. Inadequate fuel tank ventilation.
Check vent in fuel tank cap for obstruction.
Step 3. Fuel filter blocked.
Notify field maintenance to check and replace fuel filter if necessary.
Step 4. Check fuel lines for leaks.
If leaks are found, notify field maintenance.
0039 00-3






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