TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONT’D)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 7.
Air in cooling system.
a. Inspect hose clamps for leaks on suction side of the water pump. If OK, do Step 8.
b. Tighten clamps and/or replace hoses as required.
Step 8.
Clogged radiator, cylinder head cooling passages, cylinder block.
a. Flush engine coolant system.
b. Refill with correct coolant. (Refer to TM 5-3810-306-10.)
Step 9.
Defective water pump.
a. Remove and inspect water pump.
b. Replace water pump. (Refer to page 7-21.)
22. COOLANT LOSS
Step 1.
Defective water pump.
a. Remove and inspect water pump. If OK, do Step 2.
b. Replace water pump. (Refer to page 7-21.)
Step 2.
Engine oil cooler leak.
a. Inspect engine oil cooler for leaking coolant. If OK, do Step 3.
b. Contract Direct Support Maintenance to replace oil cooler.
Step 3.
Cylinder head gasket leak.
a. Check head gasket for leaks. If OK, do Step 4.
b. Contact next higher maintenance level to replace cylinder head gasket.
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