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TM 10-4320-324-14
Table 4-2. Troubleshooting CONT.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE ASSEMBLY (CONT)
8.
OIL PRESSURE GAUGE READING TOO LOW.
Step 1. Refer to paragraph 3-9 and check engine oil level.
Add oil as required (see LO 10-4320-324-12).
Step 2. Inspect for leaks in lube oil system.
Tighten all connections on pumps, lines, filter, pressure gauge, and cooler.
Notify direct support maintenance to check for excessive play on main bearing.
Step 3. Improper operation of low oil pressure switch.
Refer to paragraph 4-54 and replace switch.
Step 4. Improper operation of oil pressure sending unit.
Refer to paragraph 4-55 and replace oil pressure sending unit.
Step 5. Improper operation of oil pressure gauge.
Refer to paragraph 4-59 and replace gauge.
Step 6. Oil pump malfunction.
Notify direct support maintenance.
9.
AMMETER READING TOO LOW.
Step 1. Check v-belt tension, causing alternator to operate at low output.
Refer to paragraph 4-33 and tighten v-belt.
Step 2. Check for loose connections at alternator, causing insufficient charging of the batteries.
Tighten wiring connections at alternator.
Step 3. Check for defective alternator, causing insufficient charging of the batteries.
Refer to paragraph 4-35 and replace alternator.
4-15
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