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 TM 55-1905-223-24-3
Table 3-1. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13.
Excessive crankcase gases (blowby).
STEP 1.
Check to see if piston rings are broken or worn.
Refer to Malfunction 7, Step 1 corrective action.
14.
Excessive engine vibration.
STEP 1.
Check for loose or damaged vibration dampener.
Inspect vibration dampener (para. 3-26).
STEP 2.
Check for loose or damaged flywheel.
Repair flywheel (para. 3-25).
15.
Excessive engine noise.
STEP 1.
Check for damaged push rod or cam follower.
Replace push rods or cam followers as required (para. 3-18).
STEP 2.
Check for excessive gear train backlash or damaged gear teeth.
Replace camshaft as required (para. 3-23).
16.
Excessive white smoke at idle.
STEP 1.
Injection timing set wrong.
Check injection timing (para. 3-18).
17.
Main bearing noise.
STEP 1.
Check for loose flywheel.
Check flywheel mounting capscrews. Replace flywheel if required (para.3-25).
18.
Connecting rod bearing noise.
STEP 1.
Check to see if connecting rod capscrews are loose or not tightened
correctly.
Inspect the connecting rod capscrews (para. 3-24).
STEP 2.
Check to see if connecting rod bearings are damaged, worn, not
assembled correctly, or if wrong bearings installed.
Replace connecting rod bearings (para. 3-24).
STEP 3.
Check to see if connecting rods are bent or are out of alignment.
Replace connecting rod assembly (para. 3-24).
STEP 4.
Check for damaged or out of round crankshaft journals.
Replace crankshaft (para. 4-16).
3-6
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