Perkins 1106D Troubleshooting Manual page 60

60
Troubleshooting Section
4. Check that the turbine housing for the turbocharger
is free of dirt, debris and damage.
5. Check that the turbine blades rotate freely in the
turbocharger.
6. Ensure that the wastegate on the turbocharger is
adjusted correctly. Refer to Testing and Adjusting,
"Wastegate - Inspect". If the wastegate actuator
is faulty, replace the wastegate actuator. Refer
to Disassembly and Assembly, "Turbocharger -
Disassemble" and Disassembly and Assembly,
"Turbocharger - Assemble".
7. If necessary, replace the turbocharger. Refer
to Disassembly and Assembly, "Turbocharger
- Remove" and Disassembly and Assembly,
"Turbocharger - Install".
8. Check that the repairs have eliminated the faults.
9. If the repairs have not eliminated the fault proceed
to "Low Compression (Cylinder Pressure)".
Low Compression (Cylinder Pressure)
1. Perform a compression test. Refer to Testing and
Adjusting, "Compression - Test ".
2. If low compression is noted on any cylinders,
investigate the cause and rectify the cause.
Possible causes of low compression are shown
in the following list:
•
Loose glow plugs
•
Faulty piston
•
Faulty piston rings
•
Worn cylinder bores
•
Worn valves
•
Faulty cylinder head gasket
•
Damaged cylinder head
3. Perform all necessary repairs.
4. Ensure that the repairs have eliminated the faults.
5. If the repair does not eliminate the fault refer to
"Individual Malfunctioning Cylinder".
Individual Malfunctioning Cylinder
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated cylinder is not operating under normal
conditions. If the isolation of a particular cylinder
results in a reduction of engine speed that is less
than normal, this may indicate that the cylinder is
operating below normal performance. Investigate
the cause of the fault on any cylinder that is
not operating. Investigate the cause of the fault
on any cylinder that is operating below normal
performance.
2. If all cylinders have been checked and no
problems were detected proceed to "Electronic
Unit Injectors".
Electronic Unit Injectors
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated electronic unit injector is not operating
under normal conditions. If the isolation of a
particular cylinder results in a reduction of engine
speed that is less than normal, this may indicate
that the electronic unit injector is operating below
normal performance.
2. Remove the electronic unit injector from the
suspect cylinder. Refer to Disassembly and
Assembly, "Electronic Unit Injector - Remove".
3. Install a new electronic unit injector. Refer to
Disassembly and Assembly, "Electronic Unit
Injector - Install".
4. Repeat the test in 1. If the fault is still apparent,
remove the replacement electronic unit injector
and install the original electronic unit injector.
Refer to Disassembly and Assembly, "Electronic
Unit Injector - Remove" and Disassembly and
Assembly, "Electronic Unit Injector - Install".
5. If the fault is not eliminated, refer to the
Troubleshooting Manual for your engine
application.
SENR9982