TM 9-4940-549-14&P
Table 4-2. Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
Engine Overheats.
Check shutter control for proper operation.
Step 1.
If shutter control is working improperly, clean, adjust or replace
damaged components as required.
If shutter works properly, proceed to step 2.
Step 2.
Check radiator for damage or clogging.
If radiator is damaged, replace or repair radiator as required
If radiator is clogged, unclog radiator (para. 9-3).
If radiator is not clogged or damaged, proceed to step 3.
Check water pump for damage.
Step 3.
If water pump is damaged, replace or repair as required (para.
If water pump is not damaged, check oil pump for damage.
7.
Engine Knocks.
Step 1.
Check valve clearance.
If valves are out of adjustment, adjust valves (para. 12-4).
If valves are not out of adjustment, proceed to step 2.
Check the fuel injection nozzles for damage.
Step 2.
If the fuel injection nozzles are damaged, replace the damaged
nozzles (para. 8-7).
If the nozzles are not damaged, proceed to step 3.
Check the flywheel for damage or looseness.
Step 3.
If the flywheel is damaged, replace flywheel (para. 12-2).
If the flywheel is loose, tighten the flywheel.
If the flywheel is neither loose nor damaged, proceed to step 4.
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