TM 9-2320-289-20
Table 2-3. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
C0RRECTIVE ACTION
24. EXCESSIVE OIL LOSS
Step 1.
Step 2.
Step 3.
Step 4.
Check oil level indicator for proper reading. (See TM 9-2320-289-10)
Inspect oil filler cap vent for buildup of sand, dirt, and other foreign material that may
keep oil filler cap vent valve in an open position. If condition exists, remove oil filler
cap, clean, and shake to listen for rattling sound.
If cap rattles, install.
If cap does not rattle, replace.
Remove crankcase depression regulator valve (CDRV) assembly and CDRV hoses.
Clean with a rag and inspect for cracks. Test CDRV for proper operation.
Clear foreign material and test or replace if necessary.
Clean excess oil from exterior of valve cover, oil level indicator tube, oil pan and
plug, oil filter, fuel pump, engine oil cooler lines, and oil pressure sending unit;
check for looseness, damage, and leakage.
If leakage is evident, notify your supervisor.
25. OIL PRESSURE LIGHT ON AT IDLE
Step 1.
Check oil level indicator for proper reading. (See TM 9-2320-289-10)
Step 2.
Check engine idle speed. (See paragraph 3-25)
Step 3.
Check oil pressure sending unit for looseness, damage, or leakage.
Repair as necessary.
Step 4.
If light remains on, replace oil pressure sending unit. (See paragraph 4-14)
26. COOLANT LOSS
Step 1.
Pressurize cooling system and check for leakage on all hoses and components.
(See TM 750-254)
Tighten loose clamps, fasteners, or fittings. Replace leaking hoses and
components. (See paragraphs 3-32, 3-33, and 3-34)
Step 2.
Check radiator cap for proper relief pressure. (See TM 750-254) Relief pressure
should be 15 psi (103 kPa).
Replace if defective.
2-44
Change 2
