TM 5-3895-382-24
Problem 2
The engine exhaust has too much black smoke or
the engine overheats.
Probable Cause
1.
Extra seat washer were not removed from the threaded
recess in the cylinder head for the fuel injector nozzle.
Debris exists on the mating surface of the cylinder head
with the sea washer.
Remove any extra seat washer or debris.
2.
The fuel injector nozzle does not operate correctly.
Refer to Problem 1.
3.
The incorrect fuel injector nozzle is installed.
Make sure that all fuel injector nozzles have the correct
identification
code
for
the
engine.
Refer
to
Specifications, "Fuel Injection Nozzles".
Problem 3
The engine has lost power and the engine uses too much
fuel.
Probable Cause
1.
The fuel injector nozzle does not seal in the cylinder
head.
Refer to Problem 1.
2.
Extra seat washers were not removed from the threaded
recess in the cylinder head for the fuel injector nozzle.
Debris exists on the mating surface of the cylinder head
with the seat washer.
Remove any extra seat washer or debris.
3.
The connections of the high pressure fuel line leak.
Tighten the fittings of the high pressure fuel line.
4.
The fuel injector nozzle does not operate correctly.
Refer to Problem 1.
Test the fuel injector nozzle on a nozzle tester.
5.
The incorrect fuel injector nozzle is installed.
Make sure that all fuel injector nozzles have the correct
code for the engine.
6.
A connection of the fuel return line leaks.
Inspect all connections of the low pressure fuel line for
tightening to the correct torque.
Problem 4
The engine has the following symptoms: knocks, runs
uneven, and misfires.
Probable Cause
1.
The fuel injector nozzle does not seal in the cylinder
head.
Refer to Problem 1.
2.
Extra seat washers were not removed from the threaded
recess in the cylinder head for the fuel injector nozzle.
Debris exists on the mating surface of the cylinder head
with the sea washer.
Remove any extra seat washer or debris.
3.
The connections of the high pressure fuel line leak.
Tighten the fittings of the high pressure fuel line.
4.
The fuel injector nozzle does not operate correctly.
Refer to Problem 1.
Test the fuel injector nozzle on a nozzle tester.
5.
The incorrect fuel injector nozzle is installed.
Make sure that all fuel injector nozzles have the correct
code for the engine.
6.
A restriction exists in the high pressure fuel line.
Inspect all high pressure fuel lines for damage.
Troubleshooting Fuel Injector Nozzles On A Nozzle
Tester
NOTE:
Be careful when you are handling the fuel injector
nozzles in order to prevent damage to the orifices,
threads, and other surfaces. When a fuel injector
nozzle is installed, make sure that all surfaces and
threads are clean.
The procedures which require disassembly or the adjustment
of the fuel injector nozzle only relate to the following engines:
Type 1 Engines and 9RM Engines
6-27
