Symptom Tree t106
| Cause | Correction |
|---|
|
Bulk oil supply is contaminated |
Check the bulk oil supply. Drain the oil and replace with noncontaminated oil. Replace the oil filters. Refer to Procedure 007-025. |
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|
Lubricating oil does not meet specifications for operating conditions |
Change the oil and filters. Refer to Procedure 007-025. Use the oil type recommended in Section V of the operation and maintenance manual. |
|
|
Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to Section V in the Operation an Maintenance Manual M11 Series Engines 1994 Certification Levels, Bulletin 3666072, the Operation and Maintenance Manual Industrial Engines, Bulletin 3666117, or the Operation and Maintenance Manual M11 Plus Series Engines, Bulletin 3666143. |
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|
Fuel grade is not correct for the application or the fuel quality is poor |
Operate the engine from a tank of high-quality fuel. Refer to the Fuel for Cummins Engines, Bulletin 3379001. |
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|
Coolant temperature is below specification or the intake manifold air temperature is below specification |
Refer to the Coolant Temperature Below Normal symptom tree. |
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|
Lubricating oil is contaminated with coolant or fuel |
Refer to the Lubricating Oil Contaminated symptom tree. |
|
|
Crankcase pressure is excessive |
Check for excessive blowby. Refer to the Crankcase Gases (Blowby) Excessive symptom tree. |
|
|
Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. Refer to Procedure 003-002. |
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|
STC oil control valve is damaged |
Remove and inspect the STC valve. Refer to Procedure 006-037. |
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|
Injector cup is damaged or is not correct |
Check the injector cups for damage and for correct part numbers. Refer to Procedure 006-026. |
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|
Static injection timing is not correct |
Check the static injection timing. Refer to Procedure 006-025. |
