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 TM 55-1905-223-24-5
Table 2-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 4.
Check to see if starting circuit component is malfunctioning. Refer to para. 2-21.
Replace starter motor as required.
31. Excessive crankcase gases (blowby).
STEP 1.
Check for restricted crankcase breather vent tube. Clear breather tube restriction (para.
STEP 2.
Check to see if turbocharger seals are leaking. Replace turbocharger (para. 2-26).
32. Excessive engine vibration.
STEP 1.
Check to see if engine idle speed too low.
a.
Adjust engine idle speed. (Refer to PMCS Table 2-1, Item 7.)
b.
Secure driveline to bowthruster waterjet and fire pump and couplings.
STEP 2.
Check for loose mountings. Secure mounting capscrews. Torque to 135 ft-lbs.
33. Excessive engine noise.
STEP 1.
Check for accessory noise. Make sure that engine accessories are not the cause of the
noise first. Secure accessories and brackets.
STEP 2.
Check for excessive valve or injector clearance. Adjust valve and/or injectors (para. 2-
34).
34. Excessive white smoke at idle.
STEP 1.
Check for defective engine coolant heater. Replace heater (para. 2-32).
STEP 2.
Check for low coolant temperature. Refer to "Coolant Temperature Below Normal,"
Malfunction 2, Steps 1 and 2.
STEP 3.
Check for poor fuel quality. Drain and clean fuel tank. Replenish fuel.
STEP 4.
Check for raw fuel in intake manifold.
STEP 5.
Check valve or injector adjustment. Adjust valves and/or injectors (para. 2-34).
STEP 6.
Check to see if injector cups are damaged or cracked. Replace injector (Refer to para.
2-52
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