Change 1
14-5
TM 9-2320-387-24-2
MALFUNCTION
TEST OR INSPECTION
END OF TESTING!
7.
EXCESSIVE ENGINE VIBRATION
Step 1.
Check for air in fuel lines. Bleed air from fuel lines (para. 3-33).
Step 2.
Remove and test fuel injection nozzles. Replace defective fuel injection nozzles (para. 16-3).
Step 2.1. Check defective fuel injection pump. Replace defective fuel injection pump (para. 16-6).
Step 3.
Check for broken engine mounts. Replace broken engine mounts (para. 15-3).
Step 4.
Remove converter housing cover (para. 5-11 or 5-12) and tighten torque converter
capscrews to 32 lb-ft (43 N•m).
Step 5.
Check for loose or damaged torsional damper. Replace if damaged (para. 15-7).
Step 6.
Check for damaged flywheel and missing counterweight on flywheel. Replace flywheel if
damaged or counterweight is missing (TM 9-2815-237-34).
END OF TESTING!
8.
EXCESSIVE EXHAUST SMOKE
a. Black Smoke
Step 1.
Check for restricted exhaust pipe, catalytic converter, muffler, and intake manifold.
Replace exhaust pipe (para. 3-48), catalytic converter, muffler (para. 3-49) or intake
manifold (para. 15-16 or 15-17) if restricted.
Step 2.
Remove and test fuel injection nozzles. Replace worn fuel injection nozzles (para. 16-3).
Step 3.
Check fuel injection pump timing (para. 15-23).
Step 4.
Check for worn or damaged fuel injection pump. Replace worn or damaged fuel injection
pump (para. 16-6).
END OF TESTING!
b. White Smoke
Step 1.
Perform step 2 of malfunction 12.
Step 2.
Remove and test glow plugs. Replace inoperative glow plugs (TM 9-2815-237-34).
Step 3.
Remove and test fuel injection nozzles. Replace worn fuel injection nozzles (para. 16-3).
Step 4.
Check for worn or damaged fuel injection pump. Replace worn or damaged fuel injection
pump (para. 16-6).
END OF TESTING!
c. Blue Smoke
Step 1.
Perform step 3 of malfunction 2.
Step 2.
Check for worn valve oil seals. Replace worn valve oil seals (TM 9-2815-237-34).
Step 3.
Check for worn valve guides. Replace worn valve guides (TM 9-2815-237-34).
Step 4.
Check for worn or damaged pistons and piston rings. Replace worn or damaged pistons
and piston rings (TM 9-2815-237-34).
Step 5.
Check for worn or damaged cylinder block. Replace engine (para. 15-26) if cylinder block
Table 14-1. Mechanical Troubleshooting (Cont’d).
