| Cause |
Correction |
| Engine overloaded |
Check for added loading from
malfunctioning accessories or driven units, brakes dragging
and other changes in vehicle loading |
| Fuel control lever mis-adjusted |
Check/correct for stop-to-stop
travel |
| Mechanical shutoff lever partially
engaged |
Check/replace shutoff lever in
run position |
| Fuel quality poor of diesel fuel
grade No. 1 used above 32 deg. F |
Verify be operating the engine
from a temporary tank of NO. 2 diesel fuel |
| Slow Throttle response, Air fuel
tube leaking, Wastegate Diaphram ruptured, Wastegate plumbing
damaged |
Tighten the fittings, repair
plumbing or repair wastegate diaphragm |
| High pressure fuel leak |
Inspect the high pressure lines,
fittings, or delivery valve seals for leaks and repair if
necessary |
| Fuel supply inadequate |
Check the flow through the filter
to locate the source of the restriction |
| Air in the fuel system |
Bleed the fuel system and check
for suction leaks |
| Fuel transfer pump malfunctioning |
Check/replace the fuel transfer
pump |
| Malfunctioning fuel return overflow
valve |
Check/replace the return overflow
valve |
| Oil level incorrect |
Check the oil level and correct |
| Intake air inadequate or overheated |
Inspect/replace the air cleaner
element and look for restrictions. * If the vehicle is equipped
with a valve to switch the intake source from under the hood
to outside, position the valve for the season. * Coolant
passages plugged in the aftercooler.* Check the charge air
cooler for internal restriction. Replace the restricted cooler.
* Check and clean the debris from the front of the change
oil cooler. |
| Air leak between the turbocharger
and the intake manifold |
Check for leaks in the air crossover
tube, charge air cooler connections, hoses, or through holes
in the manifold cover and repair or replace |
| Exhaust restriction |
Check for any exhaust restriction
and repair |
| Fuel temperature high (greater
than 160 F) |
Fill the fuel tank. Verify the
fuel heater is off during warm weather. Check for a restricted
fuel drain line. |
| Exhaust leak at the manifold
of turbocharger |
Check and correct any leaks in
the exhaust manifold or turbocharger gaskets. Look for a
cracked exhaust manifold. |
| Fuel injection pump timing is
incorrect |
Check and time the fuel injection
pump |
| Turbocharger worn or malfunctioning |
Check for the specified boost
pressure. Refer to the turbocharger boost pressure specification.
Inspect the turbocharger and replace it necessary. |
| Valves incorrectly adjusted (valves
are not sealing) |
Check and adjust the valves |
| Extra injector sealing washer
installed under injector. This is only applicable to recent
overhaul with injectors replaced. |
Remove the extra injector sealing
washer |
| Injectors worn or malfunctioning |
Check the injectors and replace
any malfunctioning injectors |
| Engine compression is low |
Perform the compression check
to identify the malfunction. Correct as required |
| Fuel injection pump is malfunctioning |
Remove the fuel injection pump
and repair or replace as necessary. |
