M11 Series Engines – Air Compressor Pumping Excess Lubricating Oil into the Air System

Symptom Tree  t007

This is symptom tree t007
Cause Correction

Lubricating oil drain interval is excessive

Verify the correct lubricating oil drain interval. Refer to the Operation and Maintenance Manual, ISM and ISMe Engines, Bulletin 3666319.

 

Air intake system restriction to air compressor

Replace the air compressor air cleaner (if installed). Check the air intake piping. Check for air intake restriction. Refer to Procedure 010-031Procedure 010-031.

 

Contaminants are building up in the system reservoirs

Drain the reservoirs daily. Refer to the Operation and Maintenance Manual, ISM and ISMe Engines, Bulletin 3666319.

 

E-type system is not plumbed correctly

Install an Econ valve, a check valve, and system hoses. Refer to Master Repair Manual, Holset® Air Compressors, Bulletin 3666121.

 

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 OEM service manual and the Master Repair Manual, Holset® Air Compressors, Bulletin 3666121..

 

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.

 

Engine angularity during operation exceeds specification

Refer to the engine specification data sheet.

 

Crankcase pressure is excessive

Check for excessive blowby. Refer to Section 14.

 

Lubricating oil pressure is above specification

Check the oil pressure. Refer to Procedure 007-028.

 

Air compressor runs hot

If coolant temperature is above normal, refer to Coolant Temperature Above Normal – Gradual Overheat symptom tree.

 

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.

 

Air compressor is excessively worn or internally damaged

Replace or rebuild the air compressor. Refer to Procedure 012-014 and the manufacturer’s instructions. Replace the desiccant element on the Turbo/CR 2000 air dryer (if equipped). Refer to the manufacturer’s instructions.

 
Last Modified:  30-Jan-2004