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 Procedures 007-037 and 007-013. |
 |
|
Lubricating oil does not meet specifications for operating conditions |
Change the oil and filters. Refer to Procedure 007-013. |
|
|
Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to Procedure 102-002 (Maintenance Schedule) in Section 2 of the Operation and Maintenance Manual, N14 Plus, Bulletin 3666136. |
|
|
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 Fuel for Cummins Engines, Bulletin 3379001. |
|
|
Coolant temperature is below specification |
Refer to the Coolant Temperature Below Normal symptom tree. |
|
|
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 Procedures 003-001. |
|
|
STC system malfunction |
Check the electrical STC oil control valve and circuit. Refer to Procedure 006-037. |
|
|
Injector cup is damaged or is not correct |
Check the injector cups for damage and for correct part numbers. Refer to Procedure 006-026. |
|
|
Static injection timing is not correct |
Check the static injection timing. Refer to Procedure 006-025. |
