TM 5-2420-230-24-2
Troubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Page TS-24
Section TS - Troubleshooting Symptoms
Crankcase Gases (Blowby) Excessive
This is symptom tree T027.
Cause
Correction
Isolate the air compressor by disconnecting
the air inlet and outlet lines. Refer to Proce-
Air compressor is malfunctioning
.......
dure 012-003. Check blowby. If blowby is within
specifications, rebuild or replace the air
compressor.
OK
C
Check the valve guides for wear. Replace the
ylinder head valve guides are excessively
.......
cylinder head if necessary. Refer to Procedure
worn
002-004.
OK
P
Check the pistons for correct part numbers.
Refer to Control Parts List (CPL), Bulletin No.
istons or piston rings are worn, damaged, or
3379133. Check the pistons and rings for wear
.......
not correct
and damage. Refer to Procedures 001-043 and
001-047.
OK
T
Check the turbocharger compressor and
urbocharger oil seal is leaking
.......
turbine seals. Refer to Procedure 010-040 and
010-049.
L-608