Symptom Tree t007
| Cause | Correction |
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Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to Procedure 102-002 in Section 2 of the Operation and Maintenance Manual Signature and ISX Engines, Bulletin 3666251, or the Operation and Maintenance Manual Industrial and Power Generation QSX15 Engines, Bulletin 3666423. |
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Air intake system restriction to air compressor is excessive |
Replace the air compressor air cleaner (if installed). Check the air intake piping. Check engine air intake restriction if the air compressor inlet is plumbed to the vehicle or equipment intake system. Refer to Procedure 010-031. |
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|
Air compressor pumping time is excessive |
Check the air compressor duty cycle. Install larger air compressor if available. Check for and repair all air system leaks. Refer to the OEM service manual. |
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Carbon buildup is excessive in the air discharge line, check valve, or cylinder head |
Check for carbon buildup. Replace the air compressor discharge line, if necessary. Check the turbocharger for oil leaks. Check the intake tube for oil. Refer to Procedures 012-003 and 010-033. |
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Engine angularity during operation exceeds specification |
Refer to the Engine Specification data sheet. |
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Crankcase pressure is excessive |
Check for excessive blowby. Refer to the Crankcase Gases (Blowby) Excessive symptom tree. |
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Air compressor runs hot |
If coolant temperature is above normal, refer to the Crankcase Gases (Blowby) Excessive symptom tree. |
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Air compressor is excessively worn or internally damaged |
Replace the air compressor. Replace the desiccant element on the air dryer (if equipped). Refer to the OEM service manual. |
