TM 5-2420-230-24-2
roubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Page TS-26
Section TS - Troubleshooting Symptoms
Engine Acceleration or Response Poor (Continued)
Cause
Correction
Check the fuel lift pump for correct operation.
Check the pump output pressure. Replace the
Fuel lift pump is malfunctioning
.......
fuel lift pump if necessary. Refer to Procedure
005-045.
OK
F
Check the overflow valve. Refer to Procedure
uel pump overflow valve is malfunctioning
.......
006-044.
OK
A
Check for air in the fuel system. Repair source
ir in the fuel system
.......
of leak and bleed air from the system. Refer to
Procedure 006-003.
OK
A
Check the air intake system for restriction.
ir intake system restriction is above specifica-
.......
Clean or replace the air filter and inlet piping
tion
as necessary. Refer to Procedure 010-031.
OK
C
Inspect the CAC for air restrictions or leaks.
harge-air cooler (CAC) is restricted or leaking
.......
Refer to Procedure 010-027.
OK
A
Inspect the air intake and exhaust systems for
ir intake or exhaust leaks
.......
air leaks. Refer to Procedure 010-024.
OK
T
Check the turbocharger part number and
compare it to the Control Parts List (CPL),
Bulletin No. 3379133. Replace the turbo-
urbocharger is not correct
.......
charger if necessary. Refer to Procedure
010-033.
OK
T
urbocharger wastegate is malfunctioning (if
Check the wastegate for correct operation.
.......
equipped)
Refer to Procedure 010-050.
OK
T
(Continued)
L-610
