TM 5-2420-230-24-2
3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-7
Air Compressor Pumping Excess Lubricating Oil into the Air System
This is symptom tree T007.
Cause
Correction
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-
is excessive
ment intake system. Refer to Procedure
010-031.
OK
E
Install an Econ valve, check valve, and system
hoses. Refer to the Master Repair Manual,
-type system is not plumbed correctly
.......
Holset Air Compressor, Bulletin No. 3666121
OK
L
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.
OK
C
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
dure 010-033.
OK
A
If coolant temperature is above normal. Refer
ir compressor runs hot
.......
to the Coolant Temperature Above Normal -
Gradual Overheat symptom tree.
OK
C
Drain the reservoirs daily. Refer to the Opera-
ontaminants are building up in the system
.......
tion and Maintenance Manual, B Series
reservoirs
Engine, Bulletin No. 3810205.
OK
C
Check for excessive blowby. Refer to the
Crankcase Gases (Blowby) Excessive symptom
rankcase pressure is excessive
.......
tree.
OK
E
ngine angularity during operation exceeds
.......
Refer to the Engine Specification data sheet.
specification
OK
B
(Continued)
L-591
