3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Air Compressor Pumping Excess Lubricating Oil into the Air System
This is symptom tree T007.
Replace the air compressor air cleaner (if
installed). Check the air intake piping. Check
engine air intake restriction if the air compres-
Air intake system restriction to air compressor
sor inlet is plumbed to the vehicle or equip-
ment intake system. Refer to Procedure
Install an Econ valve, check valve, and system
hoses. Refer to the Master Repair Manual,
-type system is not plumbed correctly
Remove the air compressor, and check the oil
drain holes in the air compressor and the
ubricating oil drain line is restricted
accessory drive. Refer to Procedure 012-014.
Check for carbon buildup. Replace the air
compressor discharge line if necessary. Check
arbon buildup is excessive in the air dis-
the turbocharger for oil leaks. Refer to Proce-
charge line, check valve, or cylinder head
If coolant temperature is above normal. Refer
ir compressor runs hot
to the Coolant Temperature Above Normal -
Gradual Overheat symptom tree.
Drain the reservoirs daily. Refer to the Opera-
ontaminants are building up in the system
tion and Maintenance Manual, B Series
Engine, Bulletin No. 3810205.
Check for excessive blowby. Refer to the
rankcase pressure is excessive
ngine angularity during operation exceeds
Refer to the Engine Specification data sheet.