TM 5-5420-280-23&P
0012 00
LPU Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. ENGINE STARTER MOTOR DOES NOT OPERATE
Step 1. Check if control box switch is in on position.
Move switch to ON position. Refer to TM 5-5420-280-10.
Step 2. Check if oil pressure and alternator indicator lights have cone on.
a. If lights do not come on, check for low voltage, loose wires or cables.
b. If pallet batteries have low voltage, connect CBT power source to charge batteries.
c. If cables or wires are loose, tighten cables or wires. Refer to WP 0113 00.
Step 3. Check starter motor for loose wires, cables, or damage.
a. Tighten loose wires or cables. Refer to WP 0113 00.
b. If damaged, replace starter motor. Refer to WP 0105 00.
END OF TESTING
4. ENGINE ALTERNATOR INDICATOR LIGHT WILL NOT GO OFF
Step 1. Check if engine has stopped operating.
Start engine. Refer to TM 5-5420-280-10.
Step 2. Check for slipping or missing alternator belt.
a. Tighten slipping alternator belt. Refer to WP 0106 00.
b. Replace missing alternator belt. Refer to WP 0106 00.
Step 3. Check alternator for loose wires or damage.
a. Tighten loose wires. Refer to WP 0106 00.
b. Replace damaged alternator. Refer to WP 0106 00.
5. ENGINE OIL PRESSURE INDICATOR LIGHT WILL NOT GO OFF
Step 1. Check engine oil level.
Fill engine to proper oil level. Refer to WP 0016 00.
Step 2. Check if engine has stopped operating.
Start engine. Refer to TM 5-5420-280-10.
Step 3. Check engine oil pressure sender for loose wires or damage.
a. Tighten loose wires. Refer to WP 0115 00.
b. Replace oil pressure sender if damaged. Refer to TM 9-2815-250-24&P.
6. ENGINE STARTS BUT STOPS RUNNING AS SOON AS STARTER MOTOR IS DISENGAGED
Step 1. Check fuel supply from tank for obstructions.
If obstructed, clean fuel line.
Step 2. Check for clogged fuel tank filter.
If clogged, clean or replace engine fuel tank filter. Refer to WP 0102 00.
END OF TESTING
