 |
Symptom Tree t102
| Cause | Correction |
|---|
|
Verify the oil consumption rate |
Check the amount of oil added versus the mileage/hours. |
 |
|
Lubricating oil leak (external) |
Inspect the engine for external oil leaks. Tighten the capscrews, pipe plugs, and fittings. Replace gaskets, if necessary. Refer to the OEM service manual. |
|
|
Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. Refer to Procedure 003-001 in Section 3. |
|
|
Air compressor is pumping lubricating oil into the air system |
Check the air lines for carbon buildup and lubricating oil. Refer to the Air Compressor is Pumping Excessive Lubricating Oil into the Air System troubleshooting symptom tree in Section TS. |
|
|
Turbocharger oil seal is leaking |
Check the turbocharger compressor and turbine seals. Refer to Procedure 010-040 and Procedure 010-049 in Section 10. |
|
|
Lubricating oil temperature is above specification |
Refer to the Lubricating Oil Temperature Above Specification troubleshooting symptom tree in Section TS. |
|
|
Lubricating oil cooler is leaking |
Check for lubricating oil in the coolant. Refer to the Lubricating or Transmission Oil in the Coolant troubleshooting symptom tree in Section TS. |
|
|
Lubricating oil is contaminated with coolant or fuel |
Refer to the Lubricating Oil Contaminated troubleshooting symptom tree in Section TS. |
|
|
Lubricating oil dipstick calibration is not correct |
Check the dipstick calibration. Refer to Procedure 007-009 in Section 7. |
|
|
Lubricating oil does not meet specifications for operating conditions |
Change the oil and filters. Refer to Procedure 007-013 in Section 7. |
|
|
Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to Procedure 102-002 in Section 2 of the N14 Plus Operation and Maintenance Manual, Bulletin 3666136. |
|
|
Step timing control system not switching to advanced timing mode |
Inspect step timing control operation. Refer to Procedure 006-045 in Section 6. |
|
|
Piston rings are not seated correctly (after an engine rebuild or piston installation) |
Check blowby. Refer to Section 14. If blowby is excessive, check the piston rings for correct seating. Refer to Procedure 001-043 and Procedure 001-047 in Section 1. |
|
|
Cylinder liner, pistons, or piston rings are worn or damaged |
Check the pistons, piston rings, and cylinder liners. Refer to Procedure 001-043, Procedure 001-047, and Procedure 001-028 in Section 1. |
|
