Quantcast Table 2-2. Troubleshooting - continued - TM-55-1905-223-24-10042

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TM 55-1905-223-24-1
Table 2-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 4.
Check if combustion gases or intake manifold pressure entering the cooling system.
Check the cylinder head (para. 2-34), gasket (para. 2-34), and aftercooler (para. 2-32) for leaks.
Replace as necessary.
4. Coolant Loss (External).
STEP 1.
Check if hose clamps loose.
Inspect hose clamps. Tighten to 40 in-lb (5 N m) torque.
STEP 2.
Check for leaking hoses.
Inspect hoses. Replace if necessary.
STEP 3.
Check if coolant draincocks leaking.
Tighten or replace as necessary.
STEP 4.
Check coolant expansion plugs, pipe plugs, or fittings for leakage.
Tighten or replace as necessary.
STEP 5.
Check water pump seal for leaking.
Replace the water pump. Refer to para. 2-23.
STEP 6.
Check for incorrect or malfunctioning pressure cap.
Change the pressure cap.
STEP 7.
Check for leaking gaskets.
Inspect gasket sealing surfaces, and install new gaskets if leakages detected.
i
STEP 8.
Check if cylinder head gasket leaking.
Replace gasket. Refer to para. 2-34.
5. Coolant Loss (Internal).
STEP 1.
Pressure test coolant system (para. 2-13).
Check for leaks.
STEP 2.
Inspect aftercooler radiator core for leakage.
Replace radiator core. Refer to para. 2-32.
STEP 3.
Remove cylinder head (para. 2-34).
Evacuate to general support maintenance procedures to test cylinder head for leakage.
6. Lube Oil Pressure Too Low.
STEP 1.
Check if oil level l ow.
Check for oil leaks. Add engine oil as necessary.
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