50 KENR6933
Troubleshooting Section
•
Fuel rail pump
•
Low compression (cylinder pressure)
•
Individual mal
functioning cylinder
•
Electronic unit injectors
Recommended Actions
Diagnostic Codes
Check for acti
ve diagnostic codes on the electronic
service tool. Troubleshoot any active codes before
continuing with this procedure.
Speed Demand Input
1. Use the electr
onic service tool and observe the
signal for the Speed Demand Input.
2. If the signal
is erratic, refer to Troubleshooting,
“ Speed Demand Circuit (Analog) - Test” or
Troubleshooting, “Speed Demand Circuit (Digital)
-Test”.
3. If the repairs do not eliminate the fault proceed to
“Air Intake a
nd Exhaust System”.
Air Intake and Exhaust System
1. Check the air filter restriction indicator, if equipped.
2. Ensure that t
he air filter is clean and serviceable.
3. Check the air intake and exhaust systems for the
following d
efects:
•
Blockages
•
Restrictions
•
Damage to li
nes or hoses
4. If the repairs do not eliminate the fault proceed to
“Glow Plugs
”.
Glow Plugs
1. Check for proper operation of the glow plugs.
Refer to Testing and Adjusting, “Glow Plugs -
Test” .
2. If the repairs do not eliminate the fault refer to
“Valve Las
h”.
Valve Lash
1. Check the valve lash and reset the valve lash if
it is necessary. Refer to Testing and Adjusting,
“Engine Valve
Lash - Inspect and Adjust”.
2. If the repair does not eliminate the fault proceed to
“Fuel Supply”
.
Fuel Supply
1. Visually check the fuel tank for fuel. The fuel
gauge may be faulty.
2. Ensure that the fuel supply valve (if equipped) is
in the full OPEN position.
3. If the temperature is below 0 °C (32 °F), check
for solidified fuel (wax).
4. Check the primary filter/water separator for water
in the fuel.
5. Check for fuel supply lines that are restricted.
6. Check that th
e low pressure fuel lines are tight
and secured properly.
7. Check the fue
l filters.
8. Check the diesel fuel for contamination. Refer to
Testing and
Adjusting, “Fuel Quality - Test”.
9. Check for air in the fuel system. Refer to Testing
and Adjusti
ng, “Air in Fuel - Test”.
10. Ensure that the fuel system has been primed.
Refer to Tes
ting and Adjusting, “Fuel System -
Prime”.
11. Check the fu
el pressure. Refer to Testing and
Adjusting, “Fuel Syst em Pressure - Test”.
12. If the repai
r does not eliminate the fault refer to
“FuelRailPump”.
FuelRailP
ump
Note: The fuel rail pump that is installed by the
factory on
the 1106C Genset is a nonserviceable
item. If any mechanical fault or any electrical fault
occurs within the fuel rail pump then the fuel rail
pump must
be replaced.
1. Use the electronic service tool to select the
correct s
creen display. Refer to Troubleshooting,
“Troubleshooting with a Diagnostic Code”.
2. If the fau
lt is not eliminated, refer to “Low
Compression (Cylinder Pressure)”.
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