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 TM 55-1905-223-24-1
Table 3-1. Troubleshooting - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
Rough idle.
STEP 1.
Check if injection timing is wrong.
Correct engine timing. Refer to para. 3-24.
STEP 2.
Check for loose or broken engine mounts.
Secure engine mounts. To replace broken engine mounts, refer to para.3-20.
6.
Engine runs rough or misfires in operating range (warm engine).
STEP 1.
Check for damaged camshaft.
Inspect camshaft and replace if required. Refer to para. 3-2 .
STEP 2.
Check if injection timing is set incorrectly.
Correct injection timing. Refer to para. 3-24.
7.
White smoke at idle excessive.
STEP 1.
Check if injection timing is set wrong.
Correct injection timing. Refer to para. 3-24.
8.
Engine crankcase gases ( lowby) excessive.
b
STEP 1.
Check for broken piston rings.
Replace piston rings. Refer to para. 3-25.
9.
Engine noise excessive.
STEP 1.
Check for excessive gear train backlash or damaged gear teeth.
Correct gear backlash. Refer to para. 3-24.
Replace gear teeth. Refer to para. 3-24.
10. Main bearing noise.
STEP 1.
Check for loose flywheel.
Secure flywheel mounting capscrews. Refer to para. 3-26.
STEP 2.
Check if main bearing capscrews are loose, worn, or not secured.
Secure capscrews. Refer to para. 3-24.
3-5
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