Symptom Tree t007
| Cause | Correction |
|---|
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Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to the Operation and Maintenance Manual, N14 Plus, Bulletin 3666136. |
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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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|
Contaminants are building up in the system reservoirs |
Drain the reservoirs daily. Refer to the Operation and Maintenance Manual, N14 Plus, Bulletin 3666136. |
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E-type system is not plumbed correctly |
Install an Econ valve, a check valve, and system hoses. Refer to the Master Repair Manual, Holset Air Compressors, Bulletin 3666121. |
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|
Air compressor pumping time is excessive |
Replace the desiccant cartridge on the Turbo/CR 2000 air dryer. Refer to the OEM service manual. Check the air compressor duty cycle. Install a larger air compressor, if necessary. Refer to the Master Repair Manual, Holset Air Compressors, Bulletin 3666121. |
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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, 010-040, and 010-049. |
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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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Lubricating oil pressure is above specification |
Check the oil pressure. Refer to Procedure 007-028. |
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Air compressor runs hot |
If coolant temperature is above normal, refer to the Coolant Temperature Above Normal – Gradual Overheat symptom tree. |
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|
Lubricating oil drain line is restricted |
Remove the air compressor and check the oil drain holes in the air compressor and the accessory drive. Refer to Procedure 012-014. |
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|
Air compressor is excessively worn or internally damaged |
Replace or rebuild the air compressor. Refer to Procedure 012-014 and the Master Repair Manual for Holset Air Compressor, Bulletin 3666121. |
