TM 5-2420-230-24-2
Troubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Page TS-40
Section TS - Troubleshooting Symptoms
Engine Noise Excessive -- Piston
This is symptom tree T051.
Cause
Correction
Operate the engine from a tank of high-quality
fuel. Refer to the Operation and Maintenance
Fuel grade is not correct for the application, or
.......
Manual, B Series Engines, Bulletin No.
the fuel quality is poor
3810205.
OK
I
Perform the automated cylinder performance
njector is malfunctioning
.......
test. Replace injectors as necessary. Refer to
Procedure 006-026.
OK
O
Measure and adjust the overhead settings.
verhead adjustments are not correct
.......
Refer to Procedure 003-004.
OK
C
Remove and inspect the connecting rods.
onnecting rod is bent or out of alignment
.......
Refer to Procedure 001-014.
OK
P
Check for air intake system leaks. Refer to
Procedure 010024. Check the pistons and
iston or piston rings are worn, or damaged
.......
piston rings for wear or damage. Refer to
Procedure 001-043 and 001-047.
OK
P
Remove the pistons and inspect the piston pin
iston pin or bushing is loose, worn, or not
.......
and bushing for damage, wear, and correct
installed correctly
installation. Refer to Procedure 001-043.
L-624
