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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. Excessive lubricating oil consumption.
STEP 1.
Check for external oil leaks.
Tighten capscrews, pipe plugs, and fittings.
STEP 2.
Check if blowby restriction is causing external oil leaks.
Replace crankcase breather and tube (para. 2-43).
STEP 3.
Check for incorrect oil specifications.
Check oil specifications (L0 55-1905-223-10).
Change oil (PMCS Table 2-1, Item 15).
STEP 4.
Check if oil is contaminated with fuel.
Refer to "Fuel in the Lubricating Oil," Table 2-2, Item 13.
STEP 5.
Check for high oil temperature (above 250 ) (120 ).
F
C
Check engine oil and coolant levels.
STEP 6.
Check if turbocharger seal is malfunctioning.
Replace turbocharger (para. 2-30).
11. Excessive oil sludge in crankcase.
STEP 1.
Check for incorrect lubricating oil specifications.
Check lubricating oil specifications. (Refer to LO 55-1905-223-12.)
STEP 2.
Check for dirty oil filter(s).
Replace oil filter(s). Refer to PMCS Table 2-1, Item 16.
STEP 3.
Check if engine coolant temperature is too low (below 140 ) (60 ).
F
C
Check coolant thermostat operation (para. 2-28).
STEP 4.
Check if internal coolant is leaking.
a.
Pressure test the cooling system as follows:
WARNING
Wait until engine temperature is below 120 (50 ) before removing the coolant system pressure
F
C
cap. Failure to do so can cause personal injury from heated coolant spray.
(1) Check the coolant level and fill if necessary.
(2) If the surge tank is equipped with a pressure relief valve, install a plug in the overflow tube.
2-32
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