TM 5-3895-382-24
wastegate
valve lash
fuel injector nozzles
Troubleshooting The Engine
When
you
are
troubleshooting
the
engine,
refer
to
Specifications, and Testing and Adjusting for additional
information.
1.
The engine will not start.
2.
The engine starts. The engine runs for a brief period of
time. Then, the engine stops.
3.
The engine misfires or the engine runs rough.
4.
The engine runs evenly, but the engine loses power.
5.
The engine does not have enough power.
6.
The engine has excessive vibration.
7.
The engine has excessive combustion noise.
8.
The engine has valve compartment noise.
9.
The engine has oil in the cooling system.
10.
The engine knocks.
11.
The rocker arm has little movement and valve lash
exceeds the specification.
12.
The valve is loose.
13.
Oil condenses at the exhaust.
14.
The valve lash is less than the specification.
15.
Engine components have early wear.
16.
Coolant is in the lubrication oil.
17.
The engine exhausts too much black smoke or gray
smoke.
18.
The engine exhausts too much white smoke or blue
smoke.
19.
The engine has low oil pressure.
20.
The engine uses too much lubrication oil.
21.
The engine coolant is too hot.
22.
The exhaust temperature is too high.
23.
The starting motor does not turn or the starting motor
turns too slowly.
24.
The starting motor turns, but the pinion gear does not
engage flywheel ring gear.
25.
The engine does not crank when the following events
occur:
The starting motor is activated.
The pinion gear engages the ring gear.
The flywheel begins to turn.
26.
The starting motor continues to run after the ignition
switch is released.
27.
The pinion gear does not disengage after the engine
starts to run.
28.
The alternator does not charge the battery.
29.
The rate of charging of the battery by the alternator is
slow or uneven.
30.
The alternator charges the battery at a voltage that is
too high.
31.
The alternator is noisy.
Troubleshooting Problems
Problem 1
The engine will not start.
Probable Cause
1.
The engine starting procedure was incorrectly followed.
Make sure that the engine starting procedure is correctly
followed.
2.
The Fuel Stop Control is in the "NO FUEL" position.
Turn the Fuel Stop Control to the "RUN" position. Make
sure that the linkage of the fuel rack operates correctly.
3.
The fuel level is low in the tank. Air is in the fuel
system.
Fill the fuel tank with fuel. Remove the air from the fuel
system.
4.
The fuel is contaminated.
The fuel contains water, dirt, ice or wax.
5.
The cranking speed is too slow.
The engine oil is too thick. The connections of the
battery cables to the starting motor are loose.
6-39
