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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 4
Check for external or internal conditions affecting engine crankshaft rotation.
Check engine for ease of crankshaft rotation. Locate problem and correct as required.
30. Excessive crankcase gases (blowby).
STEP 1.
Check for restricted crankcase breather vent tube.
Check breather tube restriction (para. 2-39).
STEP 2.
Check for leaking turbocharger seals.
Replace turbocharger (para. 2-30).
31. Excessive engine vibration.
STEP 1.
Check for loose generator coupling.
Check driveline components and couplings.
STEP 2.
Check for loose mountings.
Replace any broken or missing bolts, washers and nuts. Tighten capscrews to 135 ft-lb.
32. Excessive engine noise.
STEP 1.
Check for accessory noise.
Make sure that engine accessories are not the cause of the noise first.
Check all accessories and brackets for tightness.
33. Excessive white smoke in idle.
STEP 1.
Check if engine coolant heater is not operating.
Check electrical source and wiring to heater. Replace heater as required (para. 2-36).
STEP 2.
Check for low coolant temperature.
Incorrect or malfunctioning thermostat.
STEP 3.
Check for poor fuel quality.
Check, clean, drain and replace.
STEP 4.
Check for raw fuel in intake manifold.
Check intake manifold for fuel. Repair or replace as necessary (para. 2-42).
STEP 5.
Check for damaged injector cups.
Replace injector (para. 2-40).
2-46
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