Holset Air Compressors – 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 OEM service manual or Cummins Engine Oil Recommendations, Bulletin 3810340.

 

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 the OEM service manual.

 

Contaminants are not being drained from the system on a regular basis

Drain the reservoirs daily. Refer to the OEM service manual or Cummins Engine Oil Recommendations, Bulletin 3810340 .

 

E-type system is not plumbed correctly

Install an Econ valve, a check valve, and system hoses. Refer to Procedure 210-001.

 

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 Procedure 210-001.

 

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 the OEM service manual.

 

Engine angularity during operation exceeds specification

Refer to the Engine Specification Data sheet.

 

Engine crankcase pressure is excessive

Check for excessive blowby. Refer to the OEM service manual.

 

Lubricating oil pressure is above specification

Check the oil pressure. Refer to the OEM service manual.

 

Air compressor runs hot

If coolant temperature is above normal, refer to the OEM service manual.

 

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 the OEM service manual.

 

Air compressor is excessively worn or internally damaged

Replace or rebuild the air compressor. Refer to the OEM service manual or the manufacturer’s instructions.

 
Last Modified:  13-Jun-2005